Physical Science (chemical change (balloon/vinegar/baking soda investigation)

Focus Question:  How can you create a chemical change?

Prediction/ Hypothesis: If we combine vinegar and baking soda, then the two will begin to fizz.

Planning: Baking soda (1 tbsp. in each balloon), vinegar (1/4 cup in each bottle), water bottles, balloons

- Each student will be given a balloon and a bottle. In the bottle there will be vinegar and in the balloon there will be baking soda. When you get your materials, place your balloon opening over your water bottle opening. Carefully pick up your balloon and let the baking soda fall into the bottle.

Data:

What We Tried	What Happened
Balloon filled with baking soda (1 tbsp.) Vinegar (1/4 cup) in the bottom of the bottle Putting the filled balloon on the bottle	The balloon immediately began to inflate. The vinegar and baking soda combining made lots of white fizz that slowly turned into a milky liquid. Balloon slowly began to deflate after a few minutes.

Claims & Evidence: We claim that when you combine a solid and a liquid, a chemical reaction can occur. This was evident when we added vinegar to the baking soda and a gas was formed.

Conclusion: Why did the balloon inflate? We combined our baking soda (solid) and vinegar (liquid) and that made a gas. The gas inflated the balloon. In this investigation could we take this gas and break it apart to make vinegar and baking soda again?

Questions: Do you think the amount of vinegar and baking soda had to do with the balloon filling up with gas? What other substances can you put together to make a gas?