Question

An antacid tablet weighing 0.943 g contained calcium carbonate as the active ingredient, in addition to an inert binder. When an acid solution weighing 56.402 g was added to the tablet, carbon dioxide gas was released, producing a fizz. The resulting solution weighed 57.135 g. How many grams of carbon dioxide were produced? ______:g

Answer 1

0.21 g CO₂

Procedure

The Law of Conservation of Mass states that mass is neither created nor destroyed in chemical reactions. If we account for all reactants and products in a chemical reaction, the total mass will be the same at any point in time in any closed system.

Based on the previous if we add 0.943 + 56.402 = 57.345 g however the total mass of the solution is lower. This leads us to understand that this is an open system and mass has been lost in the form of CO₂.

To determine the grams of CO₂ we will subtract the final measured mass from the total mass after mixing the tablet and the acid :

Mass of CO₂=57.345g - 57.135g = 0.21 g