The Student Room Group
Uni students - Complete our survey >>
Uni students - Complete our survey >>
Uni students - Complete our survey >>

Moles

In the evaporation of a solution MgSo4, when you know the moles of MgSO4, how do you work out the moles of magnesium in the magnesium sulfate?


Posted from TSR Mobile
Reply 1
Avatar for batoot
batoot
11
FM of magnesium / FM of MgSO4: 24.3 / 72.4 = 0.335
0.335 x 100 = 33.5% of MgSO4 is magnesium


so 33.5% of the moles of MgSo4 = moles of Mg in MgSO4
Original post by batoot
FM of magnesium / FM of MgSO4: 24.3 / 72.4 = 0.335
0.335 x 100 = 33.5% of MgSO4 is magnesium


so 33.5% of the moles of MgSo4 = moles of Mg in MgSO4


This is unfortunately incorrect.

You have 1 particle of magnesium per 1 formula unit of magnesium sulfate.

Hence, moles of magnesium = moles of magnesium sulfate
You work out the ratio of the Mg in the MgSO4.

So, just an understanding of the stoichiometry of the compound, really.

Quick Reply

Related discussions

Latest

Trending

Trending

Articles for you