One of the commercial uses of sulfuric acid is in the production of calcium sulfate and phosphoric acid. If 32.3 g of Ca₃(PO₄)₂ reacts with an excess of H₂SO₄, what is the percent yield if 14.3 g of H₃PO₄ are formed in the following UNBALANCED chemical equation? Ca₃(PO₄)₂ (s) + H₂SO₄ (aq) → H₃PO₄ (aq) + CaSO₄ (aq)

Answer:             1.0  × 10⁻⁵ msolution:                     as we know ph is given as,                                    ph  = -log [h⁺]and,                                    [h⁺]  =  10^-ph    (1)putting value of ph in eq. 1,                                    [h⁺]  =  10⁻⁵                                    [h⁺]  =  1.0  × 10⁻⁵ m

This is called a hybrid.