Solving a chemistry problem

Solving a chemistry problem

3(3). Determine the mass fraction (%) of indifferent impurities in a sample of copper sulfate if, after dissolving a sample of mCuSO4*5H2O g in nitric acid and electrolysis of the resulting solution, X copper is isolated on the platinum cathode:
Options 1 2 3 4
mCuSO4*5H2O, g 0.4556 0.5237 0.6274 0.5807
ХCu, g 0.1145 0.1322 0.1586 0.1463
SOLUTION FOR OPTION NUMBER 3

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