# chemistry

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you heat 4.31 grams of a nickel 2 phosphate hydrate. You heat to a constant mass of 3.09 grams. What is the formula of this hydrate?

• chemistry -

Nickel (II)

• chemistry -

4.31-3.09 = 1.22 = mass H2O driven off.
mols H2O = 1.22/molar mass = ?
mols Ni3(PO4)2 = 3.09/molar mass?
Now find the molar ratio of the Ni(II) phosphate to H2O. It look like 10 to me but check that.

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