Answer to Question #87255 in General Chemistry for Joy

Question

Phosphorus pentachloride is produced by the reaction between phosphine and chlorine gas. What mass of chlorine gas would be required to produced 0.015kg of phosphorus pentachloride?

Answer 1

2P + 5Cl₂ → 2PCl₅

M(PCl₅) = 31 + 35.5*5 = 208.5 g/mol

n(PCl₅) = m/M = 15g/208.5g/mol = 0.072 mol

n(Cl₂) = 0.072*2.5 = 0.18 mol

m(Cl₂) = n*M = 0.18mol*71g/mol = 12.78 g