A solution of phosphoric acid,

CHEMISTRY · Multi-part · A Level · Chemistry · Amount of substance · Amount of substance

Problem

A solution of phosphoric acid, H3PO4(aq)H_3PO_4(aq), is mixed with a solution of calcium hydroxide, Ca(OH)2(aq)Ca(OH)_2(aq). The following data are collected at 25 ∘ ⁣C25\,^{\circ}\!\text{C}: • Volume of H3PO4H_3PO_4 solution = 25.0 mL25.0\,\text{mL} • Molarity of H3PO4H_3PO_4 solution = 1.50 M1.50\,\text{M} • Volume of Ca(OH)2Ca(OH)_2 solution = 40.0 mL40.0\,\text{mL} • Molarity of Ca(OH)2Ca(OH)_2 solution = 1.00 M1.00\,\text{M} Assume all reactions go to completion and that the reaction mixture’s final volume is the sum of the initial volumes. (a) Write the balanced molecular equation for the reaction. (b) Write the balanced net ionic equation. (c) Identify the limiting reactant and justify your choice with stoichiometric calculations. (d) Calculate the mass of solid Ca3(PO4)2Ca_3(PO_4)_2 produced. (e) Determine the molarity of any acid species that remains unreacted in the final reaction mixture.

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