Mrs. Doza’s second grade class has been studying the different states of matter.  Their most recent experiment was interesting and very smelly, just the way they like them. They took two uncooked eggs and placed them into vinegar. They watched these eggs for several days.  They observed many little bubbles rising from the eggs!
After four days of sitting in the vinegar they took the eggs out, and you’re not going to believe this, but the egg shells had disappeared and the eggs were rubbery!! They looked like opaque water balloons!
This is what happened.  Eggs contain something called “calcium carbonate.”  This is what makes the shells hard. Now vinegar is an acid known as acetic acid. When the calcium carbonate (the egg) and acetic acid (the vinegar) combine, a chemical reaction takes place and carbon dioxide (a gas) is released. This is what the bubbles are made of.
The chemical reaction keeps happening until all of the carbon in the egg is used up. When you take the egg out of the vinegar, it is soft because all of the carbon floated out of the eggs in those little bubbles!
We are going to continue this experiment by leaving one egg in the open air and putting the other egg into an H20 solution. We’ll let you know what happened soon