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Physical Chemistry

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20 Feb 2007 20:16:12 IST

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843

REACTION PROBLEM

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PLZ TELL ME WEN WE ADD MOHR'S SALT TO KMnO4 WAT TYPE OF RXn OCCURS .PLZ REPLY & EARN A SALUTE

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Himanshu

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20 Feb 2007 20:19:42 IST

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i think its oxidation

Asvin Vaidyanath

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20 Feb 2007 20:23:42 IST

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its a redox reaction...

MnO^₄ ^- + 5Fe²⁺+ 8H⁺ ---------------> 5Fe³⁺+ Mn²⁺+ 4H₂O.

in Mn OS changes from +7 to +2.... reduction..

in Fe OS changes frm +2 to +3 ..... oxidation..

vishnu vishnu

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20 Feb 2007 20:30:02 IST

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2KMnO4+8H2SO4+10FeSO4-------K2SO4+2MnSO4+5Fe2(SO4)3+8H2O

THIS IS A REDOX REACTION.

Mn from +7 to +2

Fe from +2 to +3

vir sharma

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20 Feb 2007 21:03:59 IST

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but can't it be neutralization reaction

Asvin Vaidyanath

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20 Feb 2007 21:07:16 IST

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neutralization?? why??

Asvin Vaidyanath

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20 Feb 2007 21:07:32 IST

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neutralization?? why??

vir sharma

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20 Feb 2007 21:14:34 IST

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because end pt is pink to colourless hence its a neutralization rxn

Asvin Vaidyanath

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20 Feb 2007 21:28:20 IST

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Yea....bcoz when endpt is reached the pH of the solution just abt equals 7 for a strong base-strong acid titration.....Yea so it neutralizes

arun-rashi

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25 Feb 2007 17:52:22 IST

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mohrs salt is Fe2(SO4)3 .(NH4)2SO4.6H2O so iron in +2 oxidation state when it reacts with KMnO4 IT oxidise into +3 state.here redox titration occurs where neutralisation of an oxidising agent with redusing agent.potassiumpermagnate works as self indicator purple colour canges into colourless.

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