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serious [3.7K]
3 years ago
15

4. A student started with a 0.032 g sample of copper which he took through the series of reactions described in this experiment.

At the end of the experiment he obtained 0.038 g of a black product. What was his percent yield
Chemistry
1 answer:
Elodia [21]3 years ago
6 0

Answer:

Y=48.6\%

Explanation:

Hello,

In this case, we can consider the following chemical reaction for the oxidation of copper which only occurs at high temperatures:

2Cu+O_2\rightarrow 2CuO

In such a way, for 0.032 grams of copper, the following grams of copper (II) oxide (black product) are yielded:

m_{CuO}=0.032gCu*\frac{1molCu}{63.546gCu} *\frac{2molCuO}{2molCu}*\frac{79.546gCuO}{1molCuO}  =0.078gCuO

Therefore, the percent yield is:

Y=\frac{0.038g}{0.078g}*100\%\\ \\Y=48.6\%

Best regards.

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