Mohr`s salt shubham kamboj 1248
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Transcript of Mohr`s salt shubham kamboj 1248
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7/25/2019 Mohr`s salt shubham kamboj 1248
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Assay of Mohr`s Salt( Ferrous Ammonium Sulphate)
AIM : To perform the assay of the given sample of mohr`ssalt .
APPARATS :(!). Mohr`s salt.("). #.! $ %Mno&
('). il."so&(&). #.! $ o*ali+ a+i, solution
(For stan,ar,isation of %Mno&solution ). Prepare, -y,issolving '# mg of o*ali+ a+i, in !## ml of ,istille, /ater.
PRI$0IP12 :Titrations /hi+h involve the pro+ess of
o*a,ition an, re,u+tion are +alle, re,o* titrations. The assayof Mohr`s salt is an e*ample of re,o* titration
( permanganametry).In the presen+e of ,il."so&3%Mno&o*i,isesFeso&of Mohr`s salt to ferri+ sulphate in +ol,+on,ition .The follo/ing rea+tions ta4es /hen mohr`s salt is
-titrate, /ith %Mno&in the presen+e of ,il."so&
R2A0TI5$S :
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In this titration %Mno&3 a+ts as a self6in,i+ator.
PR502R2: (a).For Stn,ar,isation of %Mno& Solution :
!. Pipette out !# ml of #.! $ o*ali+ a+i, into a +on+ialflas4 an, a,, !# ml of ,il."so&.
". 7arm the +ontents of the flas4 8# 0 an, titrate /ith%Mno&solution.'. 0ontinue the titra+tion until a faint pin4 +olour is
pro,u+e, . Repeat the titrations for +on+or,ant values.
&. 2nter the values in a ta-ular form.
(-).For Assay :!. 7eigt a++urately a-out ! gm of Mohr`s salt an,
,issolve in a mi*ture of "# ml of ,istille, /ater an, "#
ml of ,il."so&.". Titrate the +ontents of the flas4 /ith o.!$ %Mno&
solution until a permanent pin4 +olour is o-taine,.
'. Repeat the titration for +on+or,ant-values. 2nter thevalues in a ta-ular form.
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29IA12$T 5R I.P. FA0T5R :2a+h ml of #.! n %Mno&; #.#'