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To measure the amount of Calcium carbonate (CaCO3) in a seashell, an analytical chemist crushes a 3.60 g sample of the shell to a fine powder and titrates it to the endpoint with 202 mL of 0.2800 M hydrogen chloride (HCl) solution. The balanced chemical equation for the reaction is: 2HCl(aq) + CO3^2-(aq) -> H2CO3(aq) + 2Cl^-(aq)