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Sulphur dioxide is first oxidised to sulphur tri-oxide using the “contact process”.
The SO3 gas is then dissolved in water to form sulphuric acid.
2SO2(g) + O2 -> 2SO3(g) : A catalyst is required (Platinum)
SO3(g) + H2O -> H2SO4 (aq)
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VOTE
The electrophile that attacks the benzene ring in aromatic nitration is the nitronium
ion, NO2^+.
Concentrated sulphuric acid facilitates easy generation of the nitronium ion by its interaction with nitric acid as per the following equation.
H2SO4 + HNO3 → HSO4^- + NO2^+ + H2O
A mixture of conc.HNO3 and conc.H2SO4, therefore, is usually taken for aromatic nitration.
2026-07-05
Sulphur dioxide is first oxidised to sulphur tri-oxide using the “contact process”.
The SO3 gas is then dissolved in water to form sulphuric acid.
2SO2(g) + O2 -> 2SO3(g) : A catalyst is required (Platinum)
SO3(g) + H2O -> H2SO4 (aq)
Sulphur dioxide is first oxidised to sulphur tri-oxide using the “contact process”.
The SO3 gas is then dissolved in water to form sulphuric acid.
2SO2(g) + O2 -> 2SO3(g) : A catalyst is required (Platinum)
SO3(g) + H2O -> H2SO4 (aq)
More
VOTE
The electrophile that attacks the benzene ring in aromatic nitration is the nitronium
ion, NO2^+.
Concentrated sulphuric acid facilitates easy generation of the nitronium ion by its interaction with nitric acid as per the following equation.
H2SO4 + HNO3 → HSO4^- + NO2^+ + H2O
A mixture of conc.HNO3 and conc.H2SO4, therefore, is usually taken for aromatic nitration.
The electrophile that attacks the benzene ring in aromatic nitration is the nitronium
ion, NO2^+.
Concentrated sulphuric acid facilitates easy generation of the nitronium ion by its interaction with nitric acid as per the following equation.
H2SO4 + HNO3 → HSO4^- + NO2^+ + H2O
A mixture of conc.HNO3 and conc.H2SO4, therefore, is usually taken for aromatic nitration.
More
VOTE