Calculate the theoretical percent of water in copper (II) sulfate pentahydrate.

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Calculate the theoretical percent of water in copper (II) sulfate pentahydrate. Write the formula for this. How do i do this????

Oct 7th, 2015

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The Molecular formula for copper(II) sulfate pentahydrate=CuSO4.5H2O

Molar mass for CuSO4.5H2O=249.685g/mole

Molar mass of anhydous copper (II) sulfate (CuSO4)=159.61g/mole 

Mass of H2O in CuSO4.5H2O=249.685-159.61=90.075g

Mass %age of H2O=(mass of water in1 mole CuSO4.5H2O/mass of 1 mole CuSO4.5H2O)*100

Mass %age of H2O=(90.075/249.685)*100=36.08%

(Note: source for molar mass is wikipedia)

Please let me know if you need any clarification. I'm always happy to answer your questions.
Oct 7th, 2015

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