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What is the role of SO2,I2, Methanolic hydroxide and any
base in Karlficher titration
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Answer Posted / himal patel
meoH use as a media,when S02+water+MeOH,and base react it
give intermediatealkyl sulphite salt which is oxydised by I2
and give alkyl sulphate in this oxydation reaction water
consume.and water is consume is (1:1) of I2,when all water
consume Excess amount ofI2 detect voltemetrycally by refrence
electrode<and water amount is calculated by consumption of KF
reagent
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