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  • how is the nitration of benezene using mixed conc. H2SO4 and HNO3. If a large amount of KHSO4 added to mixture, the rate of nitration slow

Consider the nitration of benzene using mixed conc. H2SO4​ and HNO3​. If a large amount of KHSO4​ is added to the mixture, the rate of nitration will be:

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Nitrobenzene is formed in the nitration process of benzene using concentrated H_2SO_4 and HNO_3. The reaction is given by;
HNO_3+H_2SO_4\rightleftharpoons NO_2^++HSO_4^- +H_2O
If a large amount of KHSO_4 is added to the mixture, more HSO_4^- ion furnishes and rate of electrophilic aromatic reaction slow down i.e concentration of electrophile is decreased.
Hence addition of a large amount of KHSO_4  to the mixture tends to slow down the rate of nitration.

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