Instructables

How to: Set off the Barking Dog Chemical Reaction

Picture of How to: Set off the Barking Dog Chemical Reaction
HEY YOU! EVEN IF YOU JUST SKIM OVER THIS PART (which is a bad idea) AT LEAST PAY ATTENTION TO THE DISPOSAL PROCEDURES AT THE BOTTOM OF THIS SECTION!
We would like to warn you that trying to complete the "barking dog" chemical reaction is very dangerous if the necessary safety precautions are not taken properly. We are dealing with several dangerous chemicals which can irritate your skin or eyes, and even sometimes permeate your skin, or corrode your various body parts. To make sure this doesn't happen, you should do the following.
-Always wear goggles or safety glasses.
-Use either a gas mask or a fume hood to draw dangerous gasses away from you. Inhalation can be dangerous.
-Make sure to comply with waste management procedures as shown on the MSDS for each chemical.
-Cover yourself. Use a lab apron or lab coat, or just wear a long-sleeve or something. If something spills on you, get rid of the clothing it spilled on, wash whatever so the burning stops, etc. (You should know chemistry lab safety procedures prior to attempting this reaction.)
-Be careful. Make sure things work right before beginning your chemical reactions. If something isn't attached right, and chemicals start pouring out, you're gonna have a bad day. It should be pretty easy to set these things up, given the proper materials, but double check, just to be safe. 
-We'll go over this on the proper slide, but I want to say it here, too. BE VERY CAREFUL WITH THE AMMONIUM NITRATE. If heated above 240°c, ammonium nitrate could combust and explode.

MSDS Links and Disposal Guidelines:

Ammonium Nitrate -- Soluble in cold OR hot water. Pour excess down sink with plenty of either one.

Nitrous Oxide -- Suck up gas and dispose with fume hood.

Sulfur Dioxide -- “It may be necessary to contain and dispose of Sulfur Dioxide as a HAZARDOUS WASTE. Contact your state Department of Environmental Protection or your regional office of the federal Environmental Protection Agency for specific details.”

Sulfuric Acid -- Easily soluble in COLD water. Soluble in water with liberation of much heat. THIS MEANS IT CAN'T BE HOT WATER.
 
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