How to get answer chemistry question?

Posted on 2014-12-18 08:18:00 in Chemistry by WATSON

The following method is used to make crystals of hydrated nickel sulphate; An excess of nickel carbonate (12.0g) was added to 40cm^3 of sulphuric acid, 2.0 mol/dm^3. The unreacted nickel carbonate was filtered off and the filtrate evapourated to obtain the crystals.

NiCO3 + H2SO4 -> NiSO4 + H2O
NiSO4 + 7H2O -> NiSO4.7H2O

Mass of one mol of NiSO4.7H2O = 281g
Mass of one mol of NiCO3 = 119 g

Number of moles of H2SO4 in 40cm^3 of 2.0 mol/dm^3 acid = 0.08

1. Find number of moles of NiCO3 reacted
2. Find mass of nickel carbonate reacted
3. Find mass of unreacted nickel carbonate

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