Question

Epsom salt, a common hydrate, has the formula shown below. If I measure out 80 g of epsom salt to add to my foot soak, what mass of the epsom salt is H2O? Please show work!!

MgSO4 x 7H2O​

Answer 1

MgSo4 : 7H2O

Mr 120 : Mr 126

mass 80: x

then cross multiply

Step-by-step explanation:

making x the subject of the formula then you will get 84 as the mass of water