Jan 06, 2022 · The reaction of calcium phosphate with hydrochloric acid: Ca3(PO4)2 + 6HCl > 3CaCl2 + 2H3PO4 this reaction shouldn't have an influence on titration that much, because as a result there's the same number of hydrogen ions which can be neutralized, but the second reaction, of magnesium carbonate and hydrochloric acid: MgCO3 + 2HCl > MgCl2 + CO2 ...