Upon heating 125g MgSO4 • 7 H2O: a) how many grams of water can be obtained?

Answer 1

125g of MgSO4 • 7 H2O*(1 mole/ 246.47g)= moles of MgSO4 • 7 H2O

Moles of MgSO4•7H2O*(7 moles of H2O/1 mole of MgSO4•7H2O)= moles of H2O

Moles of H2O*(18.00g/mole)= mass of H2O in grams

Answer 2

64g