Question

0.2422g of organic compound gives 0.3269g of barium sulphate. Find percentage of sulphur in the compound.

Answer 1

Atomic mass of BaSO4=137+32+4×16=233g

233gBaSo4gives32g of sulphur

1gBaSO4 gives 32/233g sulphur

.°.0.3269BaSO4 gives 32/233×0.3269g of sulphur

That comes out 0.045 (apx)

Now %of sulphur=0.045/0.2422×100g

=18.53%