How many moles of CaCO3 are needed to react with 12.5 mol SO2

Answer;

= 12.5 Moles of CaSO3

Explanation;

The reaction between CaCO3 and SO2 is given by the equation.

CaCO3 (s) + SO2 (g) → CaSO3 (aq) + CO2 (g)

The mole ratio between CaCO3 and SO2 is 1 : 1;

1 mole of CaCO3 reacts with 1 mole SO2 to form CaSO3 and CO2

Therefore;

12.5 moles of SO2 will require 12.5 moles of CaSO3