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5 cards from this section. Quick, good the night before a test.
A reaction has a theoretical yield of 50.0 g, and 42.0 g of product is collected. What is the percent yield?
Divide the actual yield by the theoretical yield, then multiply by 100.
A process has a percent yield of 90.0% and a theoretical yield of 20.0 g. What mass of product is actually obtained?
Turn the percentage into a decimal first.
Which reactant determines the theoretical yield of a reaction?
Think about which reactant runs out.
A reaction has a theoretical yield of 12.0 g and an actual yield of 9.0 g. What is the percent yield?
Actual yield goes on top.
A medicine is made in two steps. Step 1 has a yield of 80.0% and step 2 has a yield of 75.0%. What is the overall percent yield, and what mass of final product can be expected from an amount of starting material that would give 50.0 g of product at 100% yield in both steps?
Convert both yields to decimals and multiply them.
In a model of the Haber process, 28.0 g of nitrogen reacts with 9.0 g of hydrogen: N₂ + 3H₂ → 2NH₃. Identify the limiting reactant, calculate the theoretical yield of ammonia, and find the percent yield if 5.1 g of ammonia forms in one pass. (N = 14.0, H = 1.0)
Check which reactant runs out first using the 1 : 3 ratio.
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