When copper is heated with an excess of sulfur, copper(I) sulfide is formed. In a given...
When copper is heated with an excess of sulfur, copper(I) sulfide is formed.
In a given experiment, 2.11 g of copper was heated with excess sulfur to yield 1.76 g of copper(I) sulfide.
What is the percent yield?
Homework Answers
Balanced chemical reaction
2(Cu) + S --> Cu2S
Theoretical yield of Cu2S
= 159.16 g Cu2S x 2.11 g Cu / (2*63.546) g Cu
= 2.642 g
Actual yield = 1.76 g
% yield = 1.76*100/2.642 = 66.62%
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When copper is heated with an excess of sulfur, copper(I)
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