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Chemistry 13 Online

OpenStudy (anonymous):

Blue crystals of copper(II) sulphate have the formula: Cu(SO4)·5H2O. What is the percentage by mass of water in this substance? The answer I got was 1.773%

11 years ago

OpenStudy (zale101):

Know the molar mass of Cu(SO4) 5H2O. Use the molar mass of water (5H20) and divide by the molar mass of Cu(SO4) 5H2O then times the result by a hundred. Did you do that?

11 years ago

OpenStudy (anonymous):

I did.

11 years ago

OpenStudy (anonymous):

But a question, When finding the molar of 5H20 would the calculation be like 10(H)+5(O) ? Like, is the 5 multiplying into the H and the O?

11 years ago

OpenStudy (anonymous):

36.04%

11 years ago

OpenStudy (anonymous):

@Yondaime

11 years ago

OpenStudy (zale101):

@Yondaime that's how you do it.

11 years ago

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