Answer to Question #318502 in General Chemistry for prakash

Question

acetylene is formed by the reaction of water with calcium carbide according to the following eqation CaC2 +2H2O->Ca(OH)2 +C2H2 .how many grams of CaC2 would be needed to produce 10 L (measured at STP) acetylene .

Answer 1

CaC₂ + 2H₂O = Ca(OH)₂ + C₂H₂

n(C₂H₂) = 10 L / 22.4 L = 0.446 mol

1 mol CaC₂ produces 1 mol C₂H₂

n(CaC₂) = 0.446 mol

m(CaC₂) = n(CaC₂) × Mr(CaC₂) = 0.446 mol × 64.099 g/mol = 28.6 g