1.
What mass of 95\% pure CaCO3\text{CaCO}_3 will be required to neutralise 50 mL of 0.5 M HCl solution according to the following reaction?

CaCO3(s)+2HCl(aq)CaCl2(aq)+CO2(g)+H2O(l)\text{CaCO}_3(s) + 2\text{HCl}(aq) \rightarrow \text{CaCl}_2(aq) + \text{CO}_2(g) + \text{H}_2\text{O}(l)

[Calculate upto second place of decimal point]