Calculate the mass of phosphoric acid that can be obtained by treating

Calculate the mass of phosphoric acid that can be obtained by treating 310 kg of phosphorite containing 75% calcium phosphate with sulfuric acid.

1. We make a chemical equation, not forgetting to put down the coefficients:

Ca3 (PO4) 2 + 3H2SO4 = 3CaSO4 + 2H3PO4.

2. Find the mass of pure CaPO4:

m (CaPO4) = 310 * 0.75 = 232.5kg.

3. Find the amount of substance Ca3 (PO4) 2:

n (Ca3 (PO4) 2) = m / M = 232.5 / 310 = 0.75 kmol.

4. Find the amount of substance H3PO4:

n (H3PO4) = 2n (Ca3 (PO4) 2) = 1.5 kmol.

5. Find the mass of H3PO4:

m (H3PO4) = n * M = 1.5 * 98 = 147kg.

Answer: m (H3PO4) = 147kg.