Fe2(SO4)3 is used in water and sewage treatment to aid the removal of suspended impurities. Calculate the mass percentage of iron, sulphur and oxygen in this compound.
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Step-by-step explanation:
Step 1: Molecular weight of Fe2(SO4)3 = (56 × 2) + (32 × 3) + (16 × 12) = 400
step 2:
% of Fe = weight of the Fe x 100
____________________
Mol. Wt. of Fe2o3
=56×2×100
_________ = 28 %
400
%of S = weight of the S x 100
________________
Mol. Wt. of Fe2o3
= 32 × 2 × 100
_________ 24 %
400
% of o = weight of the o x 100
____________________
Mol. Wt. of Fe2o3
= 16 × 2 × 100
___________ 48 %
400
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