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Topic: Plz Answer 2 my followinf Questionz/Reasons:  (Read 3984 times)

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Offline KK

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Plz Answer 2 my followinf Questionz/Reasons:
« on: May 25, 2009, 10:54:56 AM »
GIVER REASONS THAT WHY:


a)   In the titration of KMnO4 solution only H2SO4 is used while
other mineral acids are avoided

b)   after reduction the hot solution of Fe2+ ions is not titrated with KMnO4 solution.

c)   a hot solution of C2O42- ions is titrated with KMnO4.

d)   KMnO4 is better oxidizing agent than K2Cr2O7.

e)   in the titartion of Fe2+ ions with K2Cr2O7 solution H3PO4 is added.

f)   by the additiion of AgNO3 solution to Cr ions solution,
while ppt. of AgCl is formed but not a clear solution is obtained.

g)   for the dertermination of Cr ions by volhard's method dil. HNO3
 is added to the contents of conila flask.

h)   AgCL ppts. are washed with 1:100 HNO3 and H2O solution.

i)   H2SO4 is added to KIO3 and KI solution in iodemtric titration

j)   the addition of solid Na2S to the contents of conical flask is
complexometric titration.

Offline Borek

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Re: Plz Answer 2 my followinf Questionz/Reasons:
« Reply #1 on: May 25, 2009, 12:15:52 PM »
Please read forum rules.

Especially point 4.
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Offline KK

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Re: Plz Answer 2 my followinf Questionz/Reasons:
« Reply #2 on: May 26, 2009, 01:30:05 AM »
Okiii i'll show my attemptz.
but for few reasons bcz i dont undrstnd some reasons
as we hav done theze labz ,
but some thingz r not told us by the teachrz....
which cauz many confuzion 2 undrstnd
so kindly help me,
thnkzz

Offline Borek

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Re: Plz Answer 2 my followinf Questionz/Reasons:
« Reply #3 on: May 26, 2009, 04:00:40 AM »
Reading point 5 of the rules won't hurt either.
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