Vinegar

In our initial investigation we wondered //What happens if we freeze the vinegar or baking soda or both?// Here’s the setup:

**Materials:**

 * vinegar
 * baking soda
 * water
 * freezer trays or molds {in star shapes for a patriotic theme}
 * food coloring {optional}
 * pan/containers for play

**Instructions:**
 Invite your child to add the frozen vinegar to the baking soda and water. As the ice melts, the baking soda and vinegar will react. {If you did not add water to your vinegar before freezing, you will see more bubbles.}  Pour more baking soda and water solution onto the frozen vinegar. You’ll notice the food coloring starts to leave the ice.  Try adding baking soda directly to the frozen vinegar.  <span style="background-color: #ffffff; font-family: Arial,Helvetica,sans-serif; font-size: 14px;">Not only will you see bubbles on the ice, you will see bubbles in the water. <span style="background-color: #ffffff; font-family: Arial,Helvetica,sans-serif; font-size: 14px;"> <span style="background-color: #ffffff; font-family: Arial,Helvetica,sans-serif; font-size: 14px;">For questions to ask that go along with this activity, check out the frozen vinegar hearts post.
 * 1) <span style="background-color: #ffffff; font-family: Arial,Helvetica,sans-serif; font-size: 14px;">Pour some vinegar into a container with a spout. {I used a liquid measuring cup.}
 * 2) <span style="background-color: #ffffff; font-family: Arial,Helvetica,sans-serif; font-size: 14px;">Add a few drops of food coloring until you like the color of the vinegar. {Aiden was responsible for this step. He wanted dark blue.}
 * 3) <span style="background-color: #ffffff; font-family: Arial,Helvetica,sans-serif; font-size: 14px;">Pour the colored vinegar into your freezer trays or molds. {We used small star ice cube molds. Larger molds will make the play last longer. You can dilute the vinegar with water – half water, half vinegar works well.}
 * 4) <span style="background-color: #ffffff; font-family: Arial,Helvetica,sans-serif; font-size: 14px;">Freeze your colored vinegar.
 * 5) <span style="background-color: #ffffff; font-family: Arial,Helvetica,sans-serif; font-size: 14px;">Add some baking soda to a pan of water. {1 tsp of baking soda to 1 cup of water works well.}