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Chemistry Question Answered

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?

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Kiteman

10 years ago

The word is minim:

# a British imperial capacity measure (liquid or dry) equal to 1/60th fluid dram or 0.059194 cubic centimeters
# a United States liquid unit equal to 1/60 fluidram

70 minims = 4.14cm3

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Sedgewick17Kiteman

Reply 10 years ago

Do they mean dry cells or somthing like a car battery that has electrolites?Because I thought that the electrolites in a car batterywere made of hydracloric acid.

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GoodhartSedgewick17

Reply 10 years ago

Sulfuric acid. At least the one's here in the states.

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KitemanGoodhart

Reply 10 years ago

Could there be a reaction 'twixt battery acid and KNO3 to produce nitric acid and a different salt (K2SO4? KCl?)

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GoodhartKiteman

Reply 10 years ago

Hmmm, H2SO4 + (2)KNO3 --> H2 + (4)O2 + K2SO4

Check me out...does that balance ?

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GoodhartKiteman

Reply 10 years ago

Let me talk it out to myself....we start with O4 and O3...in order to balance the equation, I doubled the KNO3 so we now have O3 * 2 and O4 giving us a total of 10 as it were.

We end up with.......yep, you are correct ! it balanced with --> (3)O2

That often happens when I rush though something :-)

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GoodhartGoodhart

Reply 10 years ago

Opps, I forgot about the Nitrogen, ... that is what you referred to when asking about it.....hmmm How about this ?

H2SO4 + (2)KNO3 --> (2)HNO3 + K2SO4

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KitemanGoodhart

Reply 10 years ago

A-ha, yes.

Note to self: never try making nitric acid when it's late at night and you're low on iron

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GoodhartKiteman

Reply 10 years ago

And I am a wee bit out of practice LOL

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KitemanKiteman

Reply 10 years ago

(You'll never be able to buy it unless you can get somebody to "lend" you their business credentials.)

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Goodhart

10 years ago

Are you going for silver or:

how to extract pure sodium from coins ?

In US coins, if there is any silver left, it is very minute.

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Sedgewick17Goodhart

Reply 10 years ago

Sorry about thats I mean silver minute do you mean?

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GoodhartSedgewick17

Reply 10 years ago

minute, as in very small (pronounced my - nute).

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Sedgewick17Goodhart

Reply 10 years ago

Dang it! I should not have written that when I was writing a paper for my German class. I meant to say how minuet is the amount of silver is in a U.S coin?

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GoodhartSedgewick17

Reply 10 years ago

I am sorry ? I don't understand. A minuet is an elegant ballroom dance common in the 18th century, characterized by small, dainty steps danced in leisurely, triple meter.

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KitemanGoodhart

Reply 10 years ago

The small, tailed amphibian that lives in a tank in my lab is called Titch....

... because he's my newt!

(Strangely, the kids don't get it)

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GoodhartKiteman

Reply 10 years ago

Ah that elusive creature who's tail comes off to allow him to escape predators.

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Sedgewick17

10 years ago

Thanks very much. There was also a part in the book that tells how to extract pure silver from coins. Do you have any idea if coins still contain silver or anything you know of has silver in it? I remember reading something about drug addicts using nitric acid to make crack or something.That must be why it is so hard to get.

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KitemanSedgewick17

Reply 10 years ago

It's hard to get because it is dangerous - highly corrosive and its reactions can often be explosive.

As to the question of sulphuric acid:

[http://In laboratory, nitric acid can be made from Copper(II) nitrate or by reacting approximately equal masses of potassium nitrate (KNO3) with 96% sulfuric acid (H2SO4), and distilling this mixture at nitric acid's boiling point of 83 °C until only a white crystalline mass, potassium hydrogen sulfate (KHSO4), remains in the reaction vessel. The obtained red fuming nitric acid may be converted to the white nitric acid. Note that in a laboratory setting, it is necessary to use all-glass equipment, ideally a one-piece retort, because anhydrous nitric acid attacks cork, rubber, and skin, and leaks can be extremely dangerous. http://en.wikipedia.org/wiki/Nitric_acid].