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why are not used methonol in kf titrator to find out water
content in ketones?
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aldehydes and
ketones,
interfere with
the
normal Karl
Fischer
titration as
they react with
methanol to form
water which is
also titrated.
The
Karl Fischer
titration shows
an
incorrect, too
high water
content
or vanishing end
points with
classical
reagents
| Is This Answer Correct ? | 13 Yes | 0 No |
Answer / madhukar tayade
Aldehyde and ketones are react with the methanol to form the Ketal formation so that aldehyde and ketone cant give the moisture in methanolic medium.
| Is This Answer Correct ? | 5 Yes | 0 No |
Answer / jagadeeshchandra
Generally methanol is not used as a solvent for carbonyl
compounds.Usage of methanol for ketones will produce ketals
and water which gives false result.And aldehydes gives acetals
and water.
pyridine can be used in place of methanol.Halogenated
alcohols,long chain alcohols,Dimethyl formamide can also be
used.
Another thing methanol is reaction part.It forms methyl
sulphite with kf reagent.Whare base will acts as a buffering
agent.
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| Is This Answer Correct ? | 5 Yes | 0 No |
Answer / padmarao
methonl is reacts with ketones to form water so wecare used to
pyridine as a solvent
| Is This Answer Correct ? | 3 Yes | 1 No |
methanol react with ketones and forms ketoxals + water.
so we will get more % of water content which is present in
compound
| Is This Answer Correct ? | 2 Yes | 0 No |
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