Question

An antacid tablet weighing 0.943g contained calcium carbonate as the active ingredient, in addition to an inert binder. When an acid solution weighing 56.398 g was added to the tablet, carbon dioxide gas was released, producing a fizz. The resulting solution weighed 57.136 g. How many grams of carbon dioxide were produced?

Answer 1

Consider the general reaction between antacid and an acid,

Antacid + acid solution -----> Solution + CO₂ (g)

The weights of respective solutions are as follows:-

Antacid + acid solution -----> Solution + CO₂ (g)

0.943 g + 56.398 g -----> 57.136 g + CO₂ (g)

By law of conservation of mass, total mass of reactant is equal to total mass of product. In product we need to find mass of CO₂ gas. For this add the both mass of reactants and from this subtract the mass of solution.

Therefore, (0.943+56.398) g = 57.136 g + Mass of CO₂ (g)

57.341 g = 57.136 g + Mass of CO₂ (g)

Mass of CO₂ (g) = (57.341 - 57.136) g

Mass of CO₂ (g) = 0.205 g of CO₂

Therefore carbon dioxide (CO₂) produced in the reaction is 0.205 g.