Chemistry Question

I am trying to make a small amount of silver fulminate for throw snaps. I am using a recipe from a very old book and it says I should add 70 minimums of concentrated nitric acid. Any ideas on what a modern measurement of a minimum would be, and where I could buy concentrated nitric acid?

Posted by Sedgewick17 10 years ago


Need help with chemistry? Try this.

Try memorizing it.Also this one. Kiteman suggested this one.

Posted by NYPA 9 years ago


PUNS come to chemistry with CATastophic results.....

Check it out !   You've seen I haz a cheez-burger,  now we have Catty Chemists ! 

Posted by Goodhart 7 years ago


Sodium Hydroxide Question

Does anyone know of an effective way of making sodium hydroxide from salt and electro-chemistry?

Posted by jpark11 6 years ago


where can someone get chemicals for a chemistry instructables? My instructable is on methane to methanol conversion.

Where can someone get chemicals for a chemistry instructables? My instructable is on methane to methanol conversion. It uses a catalist and changes methane to methanol at room temperiture based on a peer reviewed reserch article cited in the instructable.

Posted by josheeg 9 years ago


Looking for chemistry items/vacuums

Hey guys, I just recently got parts to make my own magnetic stirrer and heating plate for organic chemistry! I don't very well plan on getting a glass blower oven so if  you guys have any glassware somehow, please let me know. If you have old vacuums, a vacuum pump (not submersible) let me know too! thanks!!

Posted by GreenD 8 years ago


Dissolve Aluminum - Golden Book Chemistry

In the Golden Book of Chemistry, page 64, there're instructions for dissolving aluminum. The book states that HYDROGEN is released when aluminum strips are dissolved in hydrochloric acid and ALUMINUM CHLORIDE is formed. That's about all we get from the book concerning that particular experiment. Just wondering if this is correct, how to test it, what it should look like and what may we [the kids and myself] may do with it if it's actually aluminum chloride. It's a good book, but quite a bit of theory's lacking. Thanks all.

Posted by Sovereignty 6 years ago


Chemistry set DIY gas mantle?

I'm looking for some help tracking down a chemistry experiment I tried as a child and would like to replicate.  As I recall it involved dissolving a solid (perhaps limestone) in a liquid (possibly vinegar), soaking some cloth in the resulting solution and burning it over a flame when it dried.  The idea was that the cloth would burn away and leave a mesh of whatever it was, probably lime, that acted as a mantle.  I tried it as a child and had limited success (I was too impatient to get some appropriate cloth or wait for it to dry properly) and would like to try it now that I'm older and wiser older. If it does have to be limestone, any ideas how I can hold of small quantities without having to go to the local chalk quarry?

Posted by PKM 7 years ago


Elementeo Chemistry Card Game

14-year-old Anshul Samar has created his own science-based fantasy card combat game Elementeo. Check out the interview with him below.Elementeo is a strategic battle game where you use your elements across the battlefield in reducing opponent's electrons to zero. You do that by harnessing the strength and moving properties of the elements and compounds, and by using their reactionary powers. For example, Oxygen can rust any neighboring metal or Copper Conductor can shock any metals and send them back to the deck. via Wired's Geekdad

Posted by ewilhelm 10 years ago


underwater sparkler

Is this real?CLICK HEREfor some reason i cant add the video if anyone wants to try, calcium chloride is basically water hardener

Posted by budsiskos 10 years ago


Isolate Boron?? Boron Carbide T-Shirt?

How would I isolate elemental boron??  Can I remove it from borax?  Also can anyone tell me the ratio of boron to water to make a boron carbide tshirt.

Posted by Moonman0922 2 years ago


Butane recovery

I have instructions for extracting pure essential oil from plant material using butane. The problem I have with it is that at the end, the butane is vented. I just don't feel right about venting unburned hydrocarbons into the atmosphere. I've been looking at glass lab equipment (distillation tubes, connectors, etc). I have no background in chemistry, but it seems to me it shouldn't be too difficult to put something together using standard glass lab equipment to capture, distill and reuse the butane. Butane boils at 31 degrees Fahrenheit and is heavier than air. At the end of the process, the oil is scraped from the bottom of a drying dish. Does anyone have any suggestions on how to put something like this together? Thanks

Posted by GlobalVillageIdiot 8 years ago


Boring brass spittoons. What to do?

I have 2 very boring old brass spittoons I'm converting into planters. Is there chemical compound or something else I can apply to the brass to change the appearance?  I'd like to jazz them up without using paint. Any ideas?

Posted by bajablue 7 years ago


Info Resource: Periodic Table of Videos

Tables charting the chemical elements have been around since the 19th century - but this modern version has a short video about each one....Soon we'll be updating all the videos with new stories, better samples and bigger experiments.So once you've watched all 118 videos, make sure you come back soon and check on our progress. The sample video below should give you a taste of it :-) The LINK to the site

Posted by Goodhart 10 years ago


Sulfur and Tin did not mix ... (trying to make DIY phosphor)

Hi ...Here is an other "failed experiment" ...I tried to mix Sulfur and Tin with the hope to make a ZnS phosphor ... (Yes, I know ... I confused Sn and Zn)So, indeed, when I poured some Sulfur powder over my melting Tin, the Sulfur melted, boiled and vaporized ...Ok. Now my question : If I pour some Sulfur powder over melting Zinc, will Sulfur vaporize, or will I get some ZnS ?(actual question : is there a simple non industrial mean to make ZnS phosphor ?)=o]

Posted by chooseausername 10 years ago


E-book: Cooking Material. Could molecular gastronomy help discover new matter?

AN INGREDIENT IS A MATERIAL! Using this e-book "Cooking Material", starting from your own familiarity with cooking, you’ll find inspiration to create material from a recipe. Please watch the book trailer (if you don't see the video, please click on this link) Is it possible to make dough with sawdust instead of flour? Caramelize glass crystals like sugar? Freeze-dry a string of wool so it resembles spaghetti? Today, industry innovation has made it possible to transform traditional materials into diverse states. Liquid wood for furniture manufacture, textile spray for auto interiors, and metallic foam for experimental prosthetics are all examples of familiar materials that have been altered into new, more efficient forms. Are these “special” recipes edible? Not at all! What is their use, then? For one, disseminating the elementary knowledge of chemical-physical reactions taking place in different materials, while maybe you will discover a wall plaster or a jewelry clay or something else useful—and allow your imagination to move freely. Molecular gastronomy adds scientific knowledge to our traditional cooking savoir-faire. This science allows to explore matter through new eyes: so grab you mixer and get cooking, get experimenting! E-book: Cooking Material. Could molecular gastronomy help discover new matter? on iTunes Store or Amazon.

Posted by humier 5 years ago


Volume of gas from given weight of dry ice?

I'm rusty on basic chem. specifically, molarity, molecular weight... Dry ice, frozen CO2 is sold by the pound. I'd like to know by working formulas, how much volume a pound of dry ice will fill once it returns to gas. Carbon has molecular weight ~ 12.  Oxygen ~16.  But I don't recall what those numbers represent. One mole of gas occupies 22.4 liters, but how much does a mole of CO2 weigh?

Posted by Toga_Dan 3 years ago


Amateur Chemistry is Dead. :-(

You're now restricted to one pound of fertilizer (or other chemicals that might be usedto make illegal fireworks) per year.Judge's Final OpinionDamn.Background info for Firefox vs CPSC

Posted by westfw 11 years ago


Chemistry equipment list?

Hello Fellow Instructablers!       Its been a while since I have made a post but I am back with a burning question!  I have a great interest in science and chemistry and always wanted to preform experiments seen on page of authors like Nurdrage for example. But I have never had the required equipment or chemicals to do these. I have taken a high school chemistry class and gotten my stuff down and now am prepared to take on the challenge of the lab. I have a birthday coming on on the 24th and my parents said if I wanted to get into chemistry I should ask for equipment and chemicals or what I need for my birthday.      So I will, but I need help. From an experienced chemist or someone who has done this before. Can anyone give me a list of basic-intermediate lab equipment that is needed for most experiments? I don't want to get one of those chemistry kits for kids since those are so restricted and only let you do the experiments given to you, not very fun So I want to get free use equipment and chemicals for any procedure. But I have no idea what is needed most or least and would really appreciate it if someone were able to do this for me. Just in the comments or PM, have a list of stuff I should ask for if I wanted to kick start my chemistry, what that item is used for, the price and its frequency of use to determine what I should decide on if there were to be a conflict. I would really appreciate any help I can get from you guys cause my birthday is coming up soon! Thanks everyone! ~Ostomesto

Posted by ostomesto 5 years ago


Modernist Cuisine: WANT!

Modernist Cuisine is finally going to be published on March 14! As a molecular biology major, chemistry minor, and general molecular gastronomy food geek, this is just about the coolest food book ever.  Of course it's pretty expensive ($625 list, $467 on Amazon), but compare this to the price of five high-level science or engineering textbooks.  It's in the same ballpark. I'd love to get my hands on this just for the excuse to break out the chemistry equipment! Check out the blog for recipes. 

Posted by canida 7 years ago


Electoplating wood. CHEMISTRY QUESTIONS!

Hello guys, Thanks alot for reading. I don't know much about chemistry outside of my one high school class. We electroplated a penny. I have a 1.5ish square-foot piece of wood, and i am wanting to CHROME IT.... chrome paint kits cost hundreds of dollars, and i've before seen chrome-plated wood.. and i want to replicate the results. [img]http://www.eastcoastpowdercoating.com/liquid%20chrome%20guitar.jpg[/img]I'm looking for a cost effective alternative to expensive chrome kits (+300 dollars for a pint)In theory.... my method would involve somehow plating the guitar with some sort of metallic based paint, then submerging it in a chrome bath. [b]IS THIS POSSIBLE??[/b]Is there a metal chemical that can somehow be applied evenly to the entire surface of the wood? (i.e. paint?)What, and how much of the specific chemicals do i need, and where can i find them?I really want this to be mirrored. Thanks so much for your responses to my problem:P

Posted by punx777 10 years ago


Periodic Table of FAILURES

Hello everyone!! It has been a while since I have posted anything but I am back. So, I am currently a freshmen in high school, taking block science. I just started chemistry and was very excited having prior knowledge and love for it. The teacher give  us a paper with the Periodic Table of Elements on it. It was made by the Navy with a bunch of pictures of ships and what-not. So it seems legit. BUT, after closer inspection I discover this is as accurate as a un-modded Nerf gun. Many errors, ranging from spelling of elements to incorrect symbols and more.          So I issue a challenge. Since I have only knowledge of Chemistry I hope that here on Instructable's there are people who know it from the back of their head and can and will find the errors in this catastrophic table. I am posting a picture of it for you to investigate, if you need it to be clearer or anything else just ask. I am very curious to see what else on this is wrong. I have already marked and fixed a few errors with a pen, but I want to see if there are more!

Posted by ostomesto 5 years ago


Glowing Mountain Dew - Chemical Reaction

Check this out:Glowing Mountain Dew on MetacafeDoes anyone know what is reacting with the baking soda and peroxide? We haven't really gotten into the chemistry portion in Science class yet. Thanks!

Posted by Bran 11 years ago


My chemistry textbook was right all along!

As reported in Physics World today, a team of Swiss and Dutch physicists have developed a novel tip for an atomic force microscope (AFM) using a single carbon monoxide molecule. The tip is stable enough to image individual atoms and bonds within molecules.The first image below is from the group's AFM of a single pentacene (C22H14) molecule on a copper (Cu(111)) substrate. The second picture shows the conventional chemical structure diagram (the vertices are carbon, and one hydrogen hangs off of each exterior corner), and the third is a "ball" model, with carbon atoms in black and hydrogen in white. As discussed in the article, the whole molecule is just 1.4 nm long, with a spacing of 0.14 nm between adjacent carbon atoms.The paper is out in today's Science, but it's pay-per-view.

Posted by kelseymh 9 years ago


Help needed for english in a lab

I need some help with english in connection with scientific work in a lab and things like that. I am able to speak english nearly fluent in normal conversation but on special subjects i am lost. I am studying chemistry and a few days ago, when i had to talk to a lab assistant, who didn't speak german(my native language), I thought something like 'WTF is that thing called where you store volatile compounds and where you do the experiments etc.'. It would be nice, if you could tell me some words for common lab equipment and phrases that are essential in a chemistry lab, especialy for the case that something goes wrong. (well of course i also need a short explanation if the meaning isn't obvious) Thanks in advance.

Posted by Arano 7 years ago


Making Copper (II) Chloride From Acid and Copper

Ok, so last 4th I made fireworks for a small- and I mean small- display, and it turned out fairly well. I only had two complaints- a) It wasn't that colorful, as I was only using pine and palm charcoal for color: reddish orange.b)it wasn't electrical, and took alot of visco, as I wanted everything to go off near-instantaneously. Well, I am going to solve problem b by getting e-matches off of Skylighter, but solving a is a little harder. Then, I read that certain copper compounds could be added to create a green to green-blue color in the flame. Well, I like that idea, but I didn't know where to get the copper compounds. So I kinda left it. UNTIL TODAY!I found this page on making copper (II) chloride. Well, it seemed straightforward enough, so I was going to try it. I was only wondering about two things:a) why on the description on this page about it include hydrogen peroxide, but the page does not even mention it?b)is this safe? I guess I should be outside for the hotplate part- I can't imagine boiling/simmering HCI, inside.c) is this even possible? Does it: 1)create a form of copper that could be used with success in pyrotechnics? 2)create copper chloride at all?Any answers are appreciated. Even if they don't directly pertain to the topic, POST ANYWAY! Makes it more interesting.

Posted by John Smith 10 years ago


Organize favorites

I'd love the ability to organize my favorites into categories that I choose.  I'm a science teacher and use instructables for various lesson ideas.  Some are for physics classes, biology classes, chemistry classes, just for fun, etc. This would make finding my favorited instructables easier to find and also convenient for sharing groups of instructables with my students.

Posted by matt.nupen 8 years ago


Ammonia + Aluminum?

I was reading all of the labels on things in my house, mostly spray-able things like spray paint, spray adhesive, spray enamel, etc., etc., to see what's flammable, and on the bottle of ammonia we have it says "Do NOT use to soak aluminum utensils in...." or something like that. What does ammonia + aluminum equal or do? Is it flammable? Thanks all you chemistry-buffs!

Posted by Bran 11 years ago


ZUBBLES!

15 years (and $3M!) in the making, finally the world's first colored bubbles have landed. And popped. And disappeared.Inventor Tim Kehoe spent nearly half his life creating these mesmerizing wonders that are sure to appeal to children and adults alike!Thanks to some seriously novel chemistry, the stain they appear to leave when they break vanishes in seconds.Go blow some up today! They can only be purchased herevia: MAKE

Posted by scoochmaroo 9 years ago


Call of Duty 4 magic spray

I was playing Call of Duty 4, and there was a part in the game where a S.A.S agent used some kind of aerosol spray that made the part of the fence that he sprayed brittle and was easily removed. I have never heard of anything in my comings and goings in chemistry that matches this, but according to the game developers they say every weapon is real. Has anyone heard of a spray or anything like this?

Posted by Sedgewick17 10 years ago


Instructables Podcast 004: A Bit of Chemistry and More Cleanup

Would you like some advice on a project your working on? Perhaps you'd like a few ideas from a new source? You can comment here or email us at howdoi@instructables.com This week we received a really interesting question from Goodhart about where to find, hard to find lab equipment. From there we decided to finish up some of the remaining forum topics left over from last week. You can listen to or download the episode below or over at archive.org: download Resources: I've decided that I only want to have one location for resources, so that I can update them as needed, and I don't have to try to go between three seperate websites and keep them all up to date. From here forward, all the resources for our podcasts will be housed at our website as opposed to the forums. There are additional reasons for this, and if you're curious, I'd be happy to let you know. Otherwise, you should go check out the links, and there's a bunch of good ones this week!

Posted by StumpChunkman 5 years ago


Vanishing forum topic -- created by "add topic" in Group, but not appearing

About 20 minutes ago, I created a forum topic https://www.instructables.com/community/My-chemistry-textbook-was-right-all-along/. I went to the Physics Group and used the + new topic link to create the posting, classifying it in Forums : Science.The topic is not showing up in the Community "recent" listing, even after I added a bump-comment myself. Could Ed, Rachel, or somebody give the database a kick? Thanks!

Posted by kelseymh 9 years ago


Explosions for football game

I am a chemistry teacher and I need to make a set of explosions for the football team to run through. The run on the field and the explosions go off on each side of them Any ideas. I may fill a dozen metal coated baloons with hydrogen and, and ignite them with some sort of electric spark strong enough to pepetrate the baloon. I'll put six of them on each side of the path that the team runs out through under the goal post. And how will I make the system to spark them off (electric plug in?)(capacitors, tesla coils, etc.?) thanks

Posted by ChemNut 11 years ago


"Boy's Life" Archives

 http://boyslife.org/wayback/ I most remember "scouts in action" these were cautionary tales, as well as how to get yourself or a stranger out of a tight spot. They seem to be about page 45 to 65. Common topics: "trapped in quicksand" or " when the cave collapsed" or "the chemistry set explosive went off in his hand!!" But there was so much more, like how to make stuff with sticks, rope and knots. So much of my kidhood was howto based on scout stuff. I'm tryin to figure out how to paste  pics from the mag at the above link.

Posted by Toga_Dan 2 years ago


sodium production

Another way for sodium production heared some where that molten sodium acetate  produces sodium metal, carbon dioxide and ethane Sodium Acetate baking soda and vinagar melting it and doing electrolysis to make sodium Melting point 324 °C, 615.2 °F (anhydrous)<(no water)> 58 °C (trihydrate) still has water Sodium Hydroxide Melting point 318 °C, 591 K, 604 °F ive made sodium with lye very useful thanks alot to this video http://www.youtube.com/watch?v=rL1cKb3_ojE message back on what you think

Posted by symboom 8 years ago


Checking Theories

In this topic, place your theories of some chemistry experiments in the comments section, starting with this one. To start with, Fe + 2H2O --> FeO2 + 2H...Place iron fillings to fill 1/3 of a water bottle. Fill the rest with water, and place a balloon on top. Wait X days/weeks/months. The water reacts with the iron to extract the oxygen from the water, leaving only hydrogen, and rust in the products. In the reactants, the hydrogen was bonded to the oxygen.Will someone tell me if this works? The energy that bonds this is the potential energy in the water.

Posted by PKTraceur 9 years ago


Home-X does Mouse Taxidermy

James Powderley's Home-X class had a mouse taxidermy session using my taxidermy Instructables. They made some great mice! Pictures here and here and here. They also learned to knit, solder, and do some chemistry; textbooks include the Cartoon Guides to Chemistry and Physics. Doesn't this sound like awesome fun? Check out the course description:Welcome to the Disruptive Home Economics class at Parsons New School for Design. To the initiated, the class is called Home X. The goal of this class is to expand our ability to make things at home, whether for entertainment, expression or survival. Home X will take us all through the center and to the fringe of what it means to make-it and do-it-yourself. We will start by making or modifying existing DIY and How-to projects and studying the way other makers solve problems and create documentation. Over the course of the semester, we will get hands-on experience researching, designing, documenting and sharing our own DIY projects. We will take a generalist's approach and gain experience with a wide range of mechanical, electrical, computational and chemical processes. We will combine novel tools and materials with common ones and build projects for ourselves as well as tools for others. Along the way, we will also look at the way cultural and historical contexts influence the technologies we make and use, as well as the implications of open source production by the masses. Students will be encouraged to release their work as openly and widely as possible and to experiment with traditional and contagious distribution of their projects.More info hereAs they say in Home-X: D.I.Y till you R.I.P.

Posted by canida 11 years ago


A Level choices

 I'm not after anything in particular here just want some opinions. After recently applying to my local sixth form college I'm curious as to...well I just want to talk really. My options are: 1.Chemistry 2.Physics 3.Mathematics 4.DT: Product design - Materials Reserve:Computing GCSE: P= predicted grade, C = current grade (Or already gained GCSE), L/10 = how much I enjoy, G/10 = how capable I am. Maths: P= A*, C=V. high A, L8/10, G7/10 Physics: P=A*, C=A*, L9/10, G9/10 ICT: P=D(distinction), C=D, L7/10, G10/10 BPE: P=A*, C=A/A*, L6/10, G8/10 Chemistry: P=A*, C=A*, L9/10, G9/10 DT (Electronics):P=A*, C=A*, L9/10, G9/10 Catering: P=A*, C=A, L5/10, G8/10 Music: P=A/A* , C=B/A, L5/10, G7/10 Biology: P=A/A*, C=A/A*, L8/10, G7/10 English Lit.: P=A*, C=A, L6/10, G6/10 English Lang.: P=A/A*, C= B/A, L6/10, G6/10 PE: No GCSE Anyone else recently applied for sixth form? Currently at sixth form college or university? Any advice? I reckon I am going to end up (sounds so negative) in Engineering or Science, whether I choose University or an apprenticeship etc. ANY advice appreciated.

Posted by DELETED_zoltzerino 8 years ago


Pop Book with lighted popup

My daughter has a project for her 8th grade Chemistry class that involves preparing a picture book on an element that is designed for younger elementary school students.  Her element is NEON.  She'd like to make a popup book, with the title page having a popup of the word NEON that will light up... we were thinking maybe making individual letters for the word NEON, and having them popup -- and perhaps having a light source behind the letters with cutouts in the letters themselves to allow the light to show through... Any ideas on how to accomplish this (easily)?  She will be doing the work HERSELF, with only advice from mom, so it needs to be as simple as possible. Thanks!

Posted by sarajoesmom 8 years ago


Chmistry buffs: IR invisible ink?

Hey all science-type people, I've seen invisible ink pens and things for sale that contain ink that show up in infrared, instead of ultraviolet light.  That's really appealing to me for a number of project ideas because digital cameras pick up IR exteremely well (especially with their filter removed). The problem is I think I'm going to want a lot of it, and those dumb little pens are crazily expensive. So any of you chemistry buffs out there have a secret formula I could make?  I'd prefer something invisible in regular light, but hey, whatever you've got. :) Thanks in advance for your help, -Kurt

Posted by PS118 7 years ago


Lab Equipments

Look at the video attached. Those of you working in biology/chemistry  research labs may be familiar with these. One of them is a rotator (with small tubes fixed in the clips) and the other one is an orbital shaker (well, technically they're both sold as rotators). Can anyone please help me with building either or both of these. I have never done a DIY project before and would love to start with these. It doesn't have to be exact same design. It could be something very simple but functionally similar. It should be able to run for extended periods without overheating (24-48 hours). Also, I would prefer something that can run in a cold room (4 degree Celsius) but I can use anything right now. http://youtu.be/gQvpz3M-WjE Much thanks in advance!

Posted by mranjan2 4 years ago


Am looking for Erector (Meccano) sets or K'nex sets...updated

But haven't a lot of "resources", so mostly unwanted sets that I could pay shipping to take them off your hands. They are for special "classes" /  tutoring segments I am having with an Asperger's Syndrome child.  (NOT the one in the video.... I am working on a wide variety of projects for the youngster.  From "squishy circuits" to robotics, to chemistry and metalurgy, but she has a keen interest in dinosaurs and Roman history, and I am a bit lost on Roman history....any suggestions on how to get THAT worked into an interesting project? Thank you Gmoon for stepping up to the plate and getting me started on this project.  It will mean the WORLD to my wonderfully attentive student :-)

Posted by Goodhart 6 years ago


I have a question about how to organize what I have been doing for the past 8 months. . .

Many of you know I am, part time, mentoring and teaching science to a young lady with Asperger's syndrome.  Partly because I have so much fun with them, and partly from just forgetting, I tend to not use my camera nor camcorder much if at all.  Aside from that, I am NOT sure how to present/organize it all.   Each "session" contains between 5 and 30  different "experiments" some as simple as comparing a rubber ball rolling down an incline to a paper tube doing the same thing up to the making and use of lab equipment. The subject matter is diverse, from physics to chemistry to astronomy. I would appreciate any adive.   Thank you.

Posted by Goodhart 6 years ago


Scientists HELP!!! Ideas/Instructables for installation art celebrating chemistry, new elements, need models of atoms

I am heading a group of teens making ART to be installed in a park in Livermore, CA where the Lawerence Livermore National Lab has commissioned us to celebrate the discovery of the 116th element "Livermorium" - problem is, we artists need help VISUALIZING and making the esoteric idea of atoms into VISUALS that the lay person could enjoy and understand. We have a corner park. We need to make INTERACTIVE science displays that are hardy to the weather and to human touch. -- How to show (the latest ideas) of an atomic model for Livermorium?? -- How to explain/show what that element is for? -- How to display the dynamics of molecules, atoms, electrons, protons, etc. --what machines does a scientist use to discover new elements? Please reply with links to images, explain simply about the structure of atoms/molecules, IDEAS?

Posted by stinastar 6 years ago


Water Release Mechanism - HELP!

I've been racking my brain trying to figure this one out, and thought I'd ask you guys. I'm building a project which requires the release of a tethered "buoy" once this sinkable object hits the water. I know I could use a mechanical release - a water sensing probe that trips a servo release - but I would rather keep it really simple, and use just chemistry and/or physics to do the work, and somewhat quickly, within a minute or two. I'm thinking that something must dissolve, expand or contract quickly when in water so that whatever is holding the buoy to the sinking object releases, and the buoy just floats to the surface. Making a toilet paper "fuse" has come to mind, but I was hoping for something more solid. I considered salt (as formed into a salt lick) but because it's so dense would take a long time to dissolve. Sugar cube seems too fragile? Any thoughts would be appreciated!

Posted by PatrickA117 1 year ago


How to grow a crystals with gypsum and other materials?

Dear: Instructables Just to let you know I am limited to materials in my house. I want to grow a crystal with plaster like plaster of Paris but I am running into a few problems. I know that Gypsum or plaster of Paris is already a crystal but it doesn't have the necessary hardness I want. I want It to have a hardness of a minimum of 6 on the Mohs's scale. I also am limited to chemistry knowledge. I've been trying all day to design a crystal with the specifications I want but I've been having trouble trying to draw a Lewis dot diagram for plaster of Paris. I am not that good at drawing Lewis dot diagrams unfortunately. Here are some materials in my house I think I could use to incorporate with the homemade crystals. Acetone Potassium Chloride Sugar Baking Soda Potassium Nitrate and more... Can I have some help please? Thank you. From: Noah

Posted by nschreiber0813 2 years ago


Periodic table closet

Hi, I'm 22 years old and I am in my master studies of chemistry. I thought would be a good time to start a collection of elements. I also want to display them properly. like in some sort of closet that you can hang to the wall. It is hard to type down where I am thinking of. The added image below is something like what I want (but in this picture they apparently forgot the Lanthanides and Actinides). How would you tackle to make something like that? I think wood is a good choice for material here (but please correct me if I'm wrong). I have a limited amount of experience of working with wood, but I figure the horizontal and vertical walls should slide into each other to make the grid. But I cannot figure out how to attach the grid to a sturdy back plate, or how to have smooth outside edges without wood sticking out to form the grid. I hope my explanations are some what clear. my explanation cortex seems not to be fully up to speed today. thank you in advance for you advice.

Posted by Jakwiebus 3 years ago


Call for Makers for Maker Faire

Entries are now being accepted for the bay area Maker Faire that will be happening on May 3-4 in San Mateo. This is an awesome event and we'll be there to represent, but we'd love to see some of you guys show off your cool ideas as well. You have until March 12 for entries. If you want to show off what you can bring in person, there are tryouts on Feb. 17 at the Exploratorium.Here are a few suggested topics: - Things Made From Recycled Items - Making Musical Instruments - 3D Printers and CNC Milling - Textile Arts - Home Automation - Rockets - Ham Radio - Puzzles, Games and Toys - Cars (hot rods, custom vans, electric vehicles) - Airplanes and Aeronautics (models, etc) - Biology/Biotech - Chemistry - Food Makers - Model Trains and Planes - Green Tech - Sewing and Felting - Kites - Old Farm or Garden Equipment (Tractors, etc.) - Temporary Structures (Tents, Domes, etc.) - Unusual Tools or Machines - How to Fix Things or Take them Apart (Vacuums, Clocks, Washing Machines, etc.) Call for Makers

Posted by fungus amungus 10 years ago


NIckel Acetate Creation from Nickel II Oxide for Nickel Plating

Chemistry question here.  I wanted to play around with some nickel plating, and I started to follow a popular recipe that I saw on YouTube.  It started with Nickel II Oxide, placed in a malt vinegar for a week to create a solution of Nickel Acetate that you could then use as a bath to plate things with Nickel.  I purchased 100 grams of 99% grade Nickel II Oxide, and let it sit in 2L of vinegar for a long time.  After 2 weeks there's no hint of the emerald green Nickel Acetate.  So I purchased some glacial Acetic Acid, and added it to a liter of distilled water to make a 50% weight solution of Acetic Acid to make a stronger solution, and still a week later nothing green.  Solution is in a clean glass vessel.  A local chemist at work said it would be slow, but man, this is taking forever.  What am I doing wrong, or what could I do different? I know Ni Acetate can be achieved with pure nickel and electricity in vinegar, but I really want to try to convert the nickel oxide. 

Posted by monteypython 4 years ago


10-15 AMPs w/ potentiometer.

So, as a chemist I thought it would be fun to save some $ by making my own hot plate & magnetic stirrer. I am using Thermoelectric cooling device (TEC) to heat my stirrer, and a small DC motor to stir. Here's the problem - if you've ever taken highschool chemistry you will know that a hot plate with a stirrer has a potentiometer for Temp & Stirring speed - I'd like to do the same! Problem: the TEC takes anywhere from 5-20 amps in operation @ 12 volts DC. Adding a potetiometer to this in parallel is out of the question - I can't fine a potentiometer that can handle greater than 2 watts. ( i may just be looking in the wrong place)... So.. all in all I'm looking for nearly 140-170 watts of power for my heating plate. (The motor will be using much less, almost negligble to the heating plate) So, if I can't put a potentiometer in series for power regulation, how can I get my temperature to vary? If this is going to require a circuit board, I may need some help with a design :)

Posted by GreenD 8 years ago