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what is karl fischer principle and reaction ,describe it
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Answer / suresh babu
The fundamental principle behind it is based on the Bunsen
reaction between iodine and sulfur dioxide in an aqueous
medium.
Water and iodine are consumed in a 1:1 ratio in the above
reaction. Once all of the water present is consumed, the
presence of excess iodine is detected voltametrically by
the titrator’s indicator electrode. That signals the end-
point of the titration.
The amount of water present in the sample is calculated
based on the concentration of iodine in the Karl Fisher
titrating reagent (i.e., titer) and the amount of Karl
Fisher reagent consumed in the titration.
B·I2 + B·SO2 + B + H2O → 2BH+I− + BSO3
BSO3 + ROH → BH+ROSO3−
| Is This Answer Correct ? | 28 Yes | 3 No |
Answer / laxman rapolu
A Quantitative chemical reaction between water and
Anhydrous SO2 and Iodine in the presence of Base(buffer)
that reacts H+ ions
SO2+RN+CH3OH------>(RNH)SO3CH3
(RNH)SO3CH3+H20+I2---->(RNH)SO4CH3+2(RNH)I
| Is This Answer Correct ? | 16 Yes | 2 No |
Answer / ajit
basically It is Biampriometric titration.
reaction
SO2+RN+CH3OH------>(RNH)SO3CH3
(RNH)SO3CH3+H20+I2---->(RNH)SO4CH3+2(RNH)I
| Is This Answer Correct ? | 14 Yes | 2 No |
Answer / ramachal yadav
karl-fisher regent contain iodine,sulpher di oxide and methanol ,it is based on fajan,s rule
reaction is given below
SO2 +I2 + 2H2O = H2SO4 +2HI
| Is This Answer Correct ? | 7 Yes | 0 No |
Answer / deepika hemant bankhede
A Quantitative chemical reaction between water and
Anhydrous SO2 and Iodine in the presence of Base(buffer)
that reacts H+.And the amount of water present in the sample is calculated
based on the concentration of iodine in the Karl Fisher
titrating reagent (i.e., titer) and the amount of Karl
Fisher reagent consumed in the titration. and the amount of Karl
Fisher reagent consumed in the titration. Macanism of action- H2O+I2+SO2+CH3OH+3RN=[RNH]SO4CH3+2[RNH]I
| Is This Answer Correct ? | 2 Yes | 1 No |
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Organic Chemistry 
