The following reactions happen simultaneously when HCl is added to a mixture of Mg(OH)2 and MgCO3: Mg(OH)2 + 2HCl → MgCl2 + 2H2O MgCO3 + 2HCl → MgCl2 + H2O + CO2 What volume (in mL) of 37 wt.% HCl solution (density = 1.2 g/mL) is needed to completely react a 25-g mixture of 35.2% MgCO3 and 64.8% Mg(OH)2 by weight?

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Stoichiometry

Stoichiometry is a chemical division that evaluates the quantitative content of the chemical process with the help of the reacting molecules or products taking part in the reaction. The term “stoicheion” in “Stoichiometry”, is an old Greek term for "element" whereas “metron” means "measure".