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This quiz contains 5 questions from a mix of 1 subtopics.
What is the percentage yield of a reaction?
The actual yield of a reaction compared to the maximum theoretical yield
The number of atoms that do not end up as useful products
A measure of the amount of starting materials that end up as useful products
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CH4 + O2 ➔ CO2 + H2O
While preparing to carry out the reaction shown above, a student calculated the maximum theoretical mass of carbon dioxide (CO2) she could produce to be 12 g.
However, during the experiment, only 9.6 g of carbon dioxide (CO2) was produced.
What was the percentage yield of the reaction?
%
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CaO + 2HCl ➔ CaCl2 + H2O
While preparing to carry out the reaction shown above, a student calculated the maximum theoretical mass of calcium oxide (CaO) he could produce to be 300 g.
However, during the experiment, only 66 g of calcium oxide (CaO) was produced.
What was the percentage yield of the reaction?
%
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Suggest 3 reasons why the percentage yield of a chemical reaction may be less than 100%.
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2Na + Cl2 ➔ 2NaCl
While preparing to carry out the reaction shown above, a student calculated the maximum theoretical mass of sodium chloride (NaCl) she could produce to be 1.6 g.
However, during the experiment, only 1.3 g of sodium chloride (NaCl) was produced.
What was the percentage yield of the reaction?
(Give your answer to 3 s.f.)
%
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