Question

chemistry 95no. Mole concept​

Answer 1

CaCO3 + 2HCl → CaCl2 + CO2 + H2O  

1mol CaCO3 reacts with 2mol HCl  

You react 0.5 mol CaCO3 . This will require 1 mol HCl .  

Molar mass HCl = 36.5g/mol  

You require 36.5g HCl  

If solution is 25% HCl by mass  

You require: Mass of solution = 100/25*36.5 = 146g HCl required.

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