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What is entire principle involved in karl fischer titration
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Answer / anil shoukat ali
the actual principle is depend on tow mothod of detection
this is
1,coulometary method
2,volumatry method
both method are differ only in the delivary of iodine and
detection of water
since we know one iodine molecules is consumed by one one
molecule of water so if
we calculate how much iodine is reacted with water in
sample then we can easily
calculatethe amount of water(this is the principle of
volumatry method)
the second method is differ that we provide iodine molecule
by oxidation of 2 iodide ions by electric method.and the
reaction is same as in above equation.
we calculate iodine by the faraday principle that is
amount of iodine that is oxidised is directly proprtional
to the amount of charge or electricity is consumed to
conver iodide ions in to iodine
| Is This Answer Correct ? | 109 Yes | 15 No |
Answer / shoukatalli
Determination water content by using Bunsen reaction
between iodine and sulphur dioxide in an aqueous medim.
| Is This Answer Correct ? | 84 Yes | 23 No |
What anil shoukhat had told is good.
The rxn is based on the bunsen reaction between iodine and
sulphur dioxide in presence of a base.Oxidation of sulphur
dioxide by iodine.The rxn is same as that of iodometry
titration.
I2+So2+2H2O--->2HI+H2So4.
Alcohol reacts with sulphur dioxide and a base to form an
intermediate alkyl suphite salt,which is then oxidised by
iodine to alkyl sulphate salt.
H2O+I2+SO2 + 3 C5H5N �� 2(C5H5N+H)I- + C5H5N��SO3
C5H5N��SO3 + CH3OH �� (C5H5N+H)O-SO2��OCH3.
Pyridine is used as a neutrilizing base.In order to shift
the equilbrium to the right of the rxn and to neutralise
the acids produced pyridine is used as the neutralizing
base.
| Is This Answer Correct ? | 21 Yes | 4 No |
water content in sample react with kf reagent to form a stable complex end point is determined conductometrically. with known weight or volume of the sample at particular concentration of the kf reagent.
| Is This Answer Correct ? | 18 Yes | 6 No |
Answer / atul patel
Karl Fischer titration is a widely used analytical method
for quantifying water content in a variety
of products. The fundamental principle behind it is based
on the Bunsen Reaction between iodine
and sulfur dioxide in an aqueous medium. Karl Fischer
discovered that this reaction could be
modified to be used for the determination of water in a non-
aqueous system containing an excess of
sulfur dioxide. He used a primary alcohol (methanol) as the
solvent, and a base (pyridine) as the
buffering agent.
| Is This Answer Correct ? | 12 Yes | 3 No |
Answer / abhishek goir
ons behind Karl Fischer titration are as follows:
CH3 OH + SO2 + RN → [RNH]SO3CH3
H2O + I2 + [RNH]SO3CH3 + 2 RN → [RNH]SO4 CH3 + 2 [RNH]I
(RN = Base)
| Is This Answer Correct ? | 6 Yes | 0 No |
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