Chemical Reactions

Blow up balloon

Blow up balloon with baking soda and vinegar When vinegar is mixed with baking soda, a double replacement reaction takes place. The end result is carbon dioxide but behind the scenes, there is more than one reaction taking place. Put a tablespoon of backing soda on to the center of a paper towel. Fold the paper towel over the baking soda a few times. The objective is to create a “time release” mechanism for our reaction. Pour ½ cup vinegar into a plastic bag. Pour ¼ cup warm water into the back with the vinegar. Hold the baking soda filled paper towel in the mouth of the plastic bag by pinching the sides to hold it. Don’t let the paper towel touch the solution yet.…
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Chemical Reactions

Amazing melting properties of salt

How and why salt melts ice Ever wonder why people pour salt on icy sidewalks to make the snow melt? Usually the result is a big pile of slush made of melted snow and ice crystals. And why do the lakes and streams freeze over solid while the ocean always remains flowing? Is there something magical about salt? Are there other uses for salt other than flavoring our food and raising our blood pressure? Let's try this experiment and see for ourselves. Test #1: Take 2 cups of water. Place about a tablespoon of salt in one of the cups. Place both cups in the freezer. Check each cup about every 10 minutes. Can you guess which one will freeze first?   Test #2: Now…
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