Question

When 42.66 grams of PCL5 react with excess P4O10, the amount of product formed is 47.22 grams of POCl3. What percent yield?

Answer 1

calculate the theoretical yield of P4O10 first

1. write and balance the equation

2. calculate how many moles of PCl5 are in 42.66g

3. according to the stoiquimetry of the reaction calculate how many moles of P4O10 will be formed

4. convert the moles of P4O10 to grams ( this is the theoretical yield

to calculate the percent yield

% yield = real yield x100 / theoretical yield