22. H,SO3 is Sulphuric acid
true/false, if false correct the
statement
Answers
Answer:
Compound (A) is a light green crystalline solid.
It is hydrated ferrous sulphate FeSO
4
.7H
2
O
Ferrous sulphate is dissolved in dil.sulphuric acid.
When KMnO
4
is added ferrous sulphate is oxidized to ferric sulphate and Mn(VII) ions are reduced to Mn(II) ions. Hence, the pink colour of KMnO
4
disappears. When ferrous sulphate is strongly heated, sulphur dioxide gas (compound B) , sulphur trioxide gas (compound C) and a residue of ferric oxide (compound D) are obtained.
2FeSO
4
strongheating
Fe
2
O
3
+SO
2
↑+SO
3
↑.
When the mnixture of sulphur dioxide and sulphur trioxide is passed through dichromate solution, sulphur dioxide reduces dichromate ion ions to green coloured Cr(III) ions.
Cr
2
O
7
2−
+2H
+
+3SO
2
→2Cr
3+
+3SO
4
2−
+5H
2
O
This solution containing sulphate ions on treatment with barium nitrate gives white ppt of barium sulphate which is compound E.
Ba(NO
3
)
2
+SO
4
2+
→
whiteppt
BaSO
4
↓
+2NO
3
−
When ferric oxide is heated with charcoal in reducing flame, it is reduced to iron.
Fe
2
O
3
+3C
heat
2Fe+3CO
Explanation:
no it is false sulphuric acid is
H2So4
Hope it helps you