Science for Kids: Baking Soda and Vinegar Experiment

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For this week’s science project, we experimented with baking soda and vinegar.

Science Materials Needed

We gathered the materials from home:

  • Baking Soda
  • Vinegar
  • Mixing Cups
  • Spoon
  • Food Coloring

First, we talked about how vinegar is a liquid and baking soda is a solid. Vinegar is also an acid (acetic acid) and baking soda is a base (sodium bicarbonate). I asked WJ what he thought would happen if we mixed them together. He looked at me and said “I don’t know” so I said “let’s find out.”

I had WJ use the spoon to scoop out some baking soda and put it in one of the cups. Next, I had him pour in a little vinegar. Here’s what happened.

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WJ’s immediate reaction was “Wow!” We decided that it would be easier to see the bubbles foam up if we added a little food coloring.

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For the next cup, WJ added a couple of drops of green food coloring and then added a spoonful of baking soda.

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Then, I had him pour the vinegar into the cup. He poured a little too much and a little too fast. We ended up with a green, foamy mess. When I asked WJ what happened he simply declared that we made “a big mess!” I told him that we may have poured the vinegar too fast and he agreed.

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WJ wanted to use red food coloring for the next cup. He added in a little red food coloring and a spoonful of baking soda.

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This time WJ poured much slower. He also added less vinegar. The reaction this time wasn’t quite as exciting. The bubbles didn’t even reach the top of the cup.

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WJ thought that maybe we should add some green food coloring. There wasn’t much of a reaction and the bubbles soon fizzled out.

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For our final cup, WJ wanted to use yellow food coloring. Again, he added a couple of drops of food coloring and one spoonful of baking soda. This time he poured the vinegar slowly and watched as the bubbles started to foam. He added a little more at a time until the bubble reached the top of the cup but didn’t spill over. He was quite proud of this result. So was I!

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Here are Some Science Concepts To Discuss With Your Child
  • chemical reaction (when an acid is mixed with a base, it forms a new chemical, a salt)
  • base (sodium bicarbonate)
  • acid (acetic acid)
  • solid
  • liquid
  • mixing
  • foaming/bubbles

Happy experimenting!

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Comments

  1. says

    This is such a cute and simple idea for kids to learn about baking soda and vinegar. I love this! Thanks for linking up at Mom’s Library last week. I am featuring this science experiment at Pounds4Pennies this week. Stop by to link up this week. I would love to see you there.

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