Percent Yield Problem Set

• 1. You baked some oatmeal raisin cookies with your Mum (or Dad, whichever one is the baker in the family)and you made 33 cookies. If you were following a three dozen recipe, what is the percent yield in your making of oatmeal cookies. (Sounds like someone was eating the cookie dough!)

• 2. You perform a chemical reaction and obtain 3.25grams of a solid product. If the theoretical yield (actual mass of solid product if all reactants are converted to desired product)is 3.89grams, what percent yield of product did you obtain?

• 3. Solid magnesium is added to a solution of copper (I)chloride to produce solid copper and magnesium chloride. If you start with 4.54grams of magnesium and obtain 17.9grams of solid copper (after filtering and drying product), what is the percent yield of copper?

• 1. Answer is 92%
• 2. Answer is 83.5%
• 3. Answer is 74.0%