Question

1- Phosphoric acid is used as a commercial fertilizer and fungicide to treat avocado crops in California, with a coverage rate of 2.50 g/m2. Phosphoric acid can be produced by the reaction between sulfuric acid and calcium phosphate, represented by the unbalanced equation written below. (20 points)

a3(PO4)2 + 3H2SO4 Ã 2H3PO4 + CaSO4

A farmer with a 12,200m^2 avocado farm wants to produce enough phosphoric acid to treat his crop.

a) He combines 39.5 kg calcium phosphate with 40.6 kg sulfuric acid. Which will be the limiting reagent?

b) How much of the excess reagent (in g) will be left over?

c0 Will the farmer produce enough phosporic acid to cover his avocado field?