Question

Given that the molar mass of Na2SO4 · nH2O is 305.12 g/mol, calculate the value of n.

Answer 1

Answer:

NaSO4⋅nH2O

Molar mass =(142+18n)

Here number of moles of water= 12.6/26.8

Mass of water = 12.6/26.8×(142+18n)

18n= 12.6/26.8×(142+18n)

n=7