A small rock of limestone placed into a solution of vinegar will instantaneously react with the acid in this chemical reaction. In this activity, students measure the decreasing mass of the rock as the chemical reaction proceeds over the course of several days. They can actually see bubbles of carbon dioxide! The science behind the mass loss is explained and the chemical formula for the reaction is provided in two formats: general and specific. The activity requires the availability of double pan or triple beam balances.
Two data tables to record the results are included and can be integrated into a laboratory notebook. Two versions of custom graph paper are also provided, one blank and the other with the X and Y axis scales already labeled. This allows you to differentiate the graph. Directions to make small crystals on top of the limestone are described!
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