a mixture of CuSO4 and CuSO4-5H2O has a mass of 1.245g, but, after hearing to dr

Question

a mixture of CuSO4 and CuSO4-5H2O has a mass of 1.245g, but, after hearing to drive off all the water, the mass is only 0.832g. what is the weight percent of CuSO4-5H2O in the mixture a mixture of CuSO4 and CuSO4-5H2O has a mass of 1.245g, but, after hearing to drive off all the water, the mass is only 0.832g. what is the weight percent of CuSO4-5H2O in the mixture a mixture of CuSO4 and CuSO4-5H2O has a mass of 1.245g, but, after hearing to drive off all the water, the mass is only 0.832g. what is the weight percent of CuSO4-5H2O in the mixture

Explanation / Answer

The mass of water in the sample is 1.245 - 0.832 = 0.413 g

0.413 g of water is 0.413 / 18.016 = 0.023 mole

1 mole of CuSO4.5H2O has 1 mole of CuSO4 and 5 moles of water .

So number of moles of CuSO4.5H2O = 0.023 / 5 = 0.0046 moles

0.0046 moles of CuSO4 = 0.0046 x 249.677 = 1.148 g

Weight percent of CuSO4.5H2O = (1.148 / 1.245) x 100 = 92.25 %

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