1. In the reaction below, 30g CaC2 is reacted with 90g H2O.

CaC2 + H2O  C2H2 + Ca(OH)2

a) What coefficients would be used to balance the reaction?

b) Which is the limiting reactant for C2H2?(show your work for each reactant)

Question

1.	In the reaction below, 30g CaC2 is reacted with 90g H2O.

CaC2   +    H2O         C2H2     + Ca(OH)2

a)	What coefficients would be used to balance the reaction?

b)	Which is the limiting reactant for C2H2?(show your work for each reactant)

anonymous · Answer

c)	What is the percentage yield (%) if only 5g of C2H2 were created?

btaylor · Answer

a) CaC2 + 2H2O --> C2H2 + Ca(OH)2
b) The limiting reactant is CaC2, since you have less than half a mole. It would be all used up before 1 mole of H2) is used up.
c) You are expecting 12.19 g of C2H2, but you only get 5. so 5/12.19 = 41% yield.