Answer to Question #87304 in Inorganic Chemistry for Abasiofon

Question

If 10g of phosphine is made to react with 15g of chlorine gas , calculate the percentage yield if 5.5g of phosphorous pentachloride was experimentally produced

Answer 1

2 PH₃ + 8 CL₂ = 2 PCL₅ + 6 HCL

M(Cl₂) = 71 g/mol

M(PCL₅) = 208.24 g/mol

M(PH₃) = 40.0 g/mol

For equation we can see, that PH₃ is an excess. So the calculations are carried out on chlorine.

568 g (CL₂) = 416.48 g (PCL₅)

15 g (Cl₂) = x g (PCL₅)

x = 416.48*15/568 = 11.0g (PCL₅)

For experiment yield is 5.5g

Percentage yield = 5.5/11.0*100% = 50%

Answer: 50%