Phosphoric acid can be made by reaction of sulfuric acid with "phosphate rock" according to the equation
Ca3(PO4)2 + 3 H2SO4 -> 3 CaSO4 + 2 H3PO4
Presume the reaction is carried out starting with 103 g ofCa3(PO4)2 as well as 75.0 g of H2SO4. Which substance is the limiting reactant?