I have seen mothballs that move up and down in water. I would like to make this for a Christmas display. Does anyone know how to do this?
Nina from Snow Camp, NC
Equipment: A glass, mothballs, baking soda, vinegar, teaspoon.
Method: Fill the glass almost to the top with water. Add four teaspoons of baking soda and stir well
until it is completely dissolved. Add four teaspoons of vinegar to the mixture and stir well. Carefully
put four mothballs into the mixture and watch carefully.
Expected Result: You will see the mothballs moving up and down the glass.
Explanation: You will see bubbles of gas forming on the mothballs and this will make them float to
the surface. Some of the bubbles will burst when they reach the top. Then you will see the mothballs
sink slowly. The vinegar and baking soda when mixed together produce carbon dioxide. Bubbles of
this gas stick to the rough surface of the mothballs and act as floats.
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What is the proportion of vinegar, to bicarbonate of soda, to water?
By Ann F
First of all mothballs alone are highly toxic to living beings and the environment in general and secondly they are highly volatile (look up the ingredients they are made of)! It's bad enough to use them at all but mixing them with any other chemicals, including vinegar, is like playing Russian Roulette. :-o
Yet another thing we lived through in the '50s.