# Question #19e89

##### 1 Answer

You divide the actual yield by the theoretical yield and multiply by 100.

**EXAMPLE**

What is the percent yield if 0.650 g of copper are formed when excess aluminum reacts with a 2.00 g of copper(II) chloride dihydrate according to the equation

**Step 1.** Write the balanced chemical equation

3CuCl₂·2H₂O + 2Al → 3Cu + 2AlCl₃ + 2H₂O

**Step 2.** Calculate the theoretical yield of Cu

**(a)** Calculate the moles of 3CuCl₂·2H₂O

**(b)** Calculate the moles of Cu

**(c)** Calculate the theoretical yield

**Step 3.** Calculate the percent yield.

% yield =