How will you prepare SO2 from H2SO4
Srijan , 12 Years ago
Grade Upto college level
Physical Chemistry> How will you prepare SO2 from H2SO4...
1 Answers
Sunil Kumar FP
Sulphur dioxide is usually made in the laboratory by heating concentrated sulphuric acid with copper turnings.
Cu + 2 H2SO4 ==> CuSO4 + SO2 + 2 H2O
Sulphur dioxide is also reduced when heated with mercury, silver or charcoal, C. Reduction with Sulphur, S, is very slow.
Sulphur dioxide is released by the action of acids on sulphites or acid sulphites (e.g. by dropping concentrated sulphuric acid into a concentrated solution of sodium hydrogen sulphite)
.NaHSO3 + H2SO4 ==> NaHSO4 + SO2 + H2O
Cu + 2 H2SO4 ==> CuSO4 + SO2 + 2 H2O
Sulphur dioxide is also reduced when heated with mercury, silver or charcoal, C. Reduction with Sulphur, S, is very slow.
Sulphur dioxide is released by the action of acids on sulphites or acid sulphites (e.g. by dropping concentrated sulphuric acid into a concentrated solution of sodium hydrogen sulphite)
.NaHSO3 + H2SO4 ==> NaHSO4 + SO2 + H2O
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