Experiment: limestone you have learned that limestone is formed from a special mineral called lime. in this experiment, you will see what happens when limestone is mixed with vinegar. this experiment uses a knife. you will need an adult to you. you will need the following materials. piece of limestone pocket knife vinegar eyedropper follow these directions. 1. ask an adult to scrape the limestone with the pocket knife. this will loosen some of the grains. 2. gather the grains into a small pile on the top of the stone. 3. using the eyedropper, drop some vinegar on the grains. 4. watch and listen to what happens. answer these questions. what happened when you put the vinegar on the limestone grains?