# Calculate the molecular weight of Al2(SO4)3.14.3H2O

dss975599

## Homework Statement

Calculate the molecular weight of Al2(SO4)3.14.3H2O

## The Attempt at a Solution

May i know how to do this ? Does it mean 14*3 = 42(H20) , where there re 84H , 42O atoms ?

• NascentOxygen

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## Homework Statement

Calculate the molecular weight of Al2(SO4)3.14.3H2O

## The Attempt at a Solution

May i know how to do this ? Does it mean 14*3 = 42(H20) , where there re 84H , 42O atoms ?
In one molecule there will be always integral number of water molecules, may be either 14 or 15. but 14.3 may be the molecules per molecule on the average. So while calculating you can take care of this.

• dss975599
dss975599
In one molecule there will be always integral number of water molecules, may be either 14 or 15. but 14.3 may be the molecules per molecule on the average. So while calculating you can take care of this.
Does it means there are 14.3 (H20 ) atoms ?
Which means 28.6 H atoms and 14.3 O atoms ?

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Does it means there are 14.3 (H20 ) atoms ?
Which means 28.6 H atoms and 14.3 O atoms ?
yes.

• dss975599
dss975599
yes.
Does it mean there are
2Al
3S
14.3H
4(3) + 14.3(2) = 40.6 O atoms ??

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Does it mean there are
2Al
3S
14.3H
4(3) + 14.3(2) = 40.6 O atoms ??
There is some mistake in calculating O and H atome.

• dss975599
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Which means 28.6 H atoms and 14.3 O atoms ?
That was correct. modify your latest thinking to be in tune with this.

• dss975599