Saturday Science Sessions – Reacting Pseudocraters

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The Saturday Science Session this week is super easy and a version of the baking soda and vinegar experiments that everyone knows!

The stuff you need:

1. Baking Soda.
2. Vinegar.
3. Cookie sheet or a tray.
4. Food coloring!
5. Eye droppers.

And the directions are even easier:

1. Cover the cookie sheet or baking tray in a thick layer of baking soda.
2. Depending on how many colors you have, fill that many cups with vinegar (half a glass is probably enough). Add drops of food coloring to the vinegar.
3. Using the eye droppers, get some of the colored vinegar and squeeze anywhere on the baking soda. Then just watch the science happen!

What you see is a multi-step reaction between the vinegar and baking soda. The acetic acid in the vinegar reacts with sodium bicarbonate (baking soda) to form a product called carbonic acid. But carbonic acid is not stable, so it undergoes a second reaction and decomposes into carbon dioxide and water. The air bubbles from the carbon dioxide create the lava-like mini explosions. Think of it also as the bubbles created between the reaction of an acid and a base!


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