Chemical interactions

Chemical interactions

by Richard Johnson
(Havelock, NC)

Using two tablespoons of vinegar, half teaspoon of baking soda, small cup for each child and very dirty pennies.

Each child will put a half teaspoon of baking soda and two tablespoons of vinegar into his small cup. He will then place a dirty penny into the cup and stir it with a stick. The child will watch the penny become clean.

Tell me what happened. Let's do it again with another penny.

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