Sulphuric acid is not used in …
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Posted by Aman Kumar 8 years, 5 months ago
- 3 answers
Aniket Garg 8 years, 5 months ago
Amar Kumar 8 years, 5 months ago
In the presence of sulphuric acid (H2SO4), KI produces HI as
2KI + H2SO4 → 2KHSO4 + 2HI
Since H2SO4 is an oxidizing agent, it oxidizes HI (produced in the reaction to I2).
2HI + H2SO4 → I2 + SO2 + H2O
As a result, the reaction between alcohol and HI to produce alkyl iodide cannot occur. Therefore, sulphuric acid is not used during the reaction of alcohols with KI. Instead, a non-oxidizing acid such as H3PO4 is used.
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Mansi Kaushal 8 years, 5 months ago
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