# 6 - Redox Reactions and n factor Questions Answers

k 4 [Fe(cn)6 ] n factor find

Asked By: AJAY GUPTA 4 year ago
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what is oxidation state of Na2S4O6?

Asked By: ANMOL SINGH 4 year ago
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what is oxidation state of Na2S4O6?

Asked By: ANMOL SINGH 4 year ago
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In the previous question (FROM REDOX TOPIC) delta G (free energy ) = -- nFE , so answer comes in -ve , but the given answer ( final delta G) is +ve I  want to know WHY THE FORMULA USED IS delta G = + nFE IS USED  IN THE SOLUTn ??

Asked By: SARIKA SHARMA 7 year ago
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Answer Strategies and trick by Manish sir (it will help you to solve it by yourself)

I think all numrical data are not given correctly.

Formula is correct.

THE E0 VALUES OF FOLLOWING REDUCTn  Rxn  R GIVEN

Fe 3+ (aq ) + e ----> Fe3+ (aq)  E0= 0.771V

Fe2+(aq)  + 2e----> Fe (s) E0 =0.447V

WHAT WILL BE THE FREE ENERGY CHANGE FOR D Rxn ?

Fe3+(aq) + 3E----> Fe(s)

ans +11.87kJ/MOL.

Asked By: SARIKA SHARMA 7 year ago
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Answer Strategies and trick by Manish sir (it will help you to solve it by yourself)

Third reaction is the sum of 1st and 2nd so energy of 3rd will be the sum of energies of 1st and 2nd.

delta G = n1FE1 + n2FE2 = 1F(0.771) + 2F(0.447) = F(0.771+0.894) = 1.665F = 1.665*96368 = 160452.7 J = 38203.03 cal = 38.20303 cal

so total energy of the reaction

Fe3+(aq) + 3e- -------> Fe(s) is 38.203 cal

and value of n = 3 so per mole energy = 38.203/3

oxide of E react with KOH & give compd like KMnO4 WHAT IS THE FORMULA OF OXIDE OF E

EO

E2O3

E2O7      OR ANY OTHER ANS (& IF ANY OTHER ONE THEN GIVE THAT ANS WITH SOLn)

Asked By: SARIKA SHARMA 7 year ago
is this question helpfull: 2 1 read solutions ( 1 ) | submit your answer
Answer Strategies and trick by Manish sir (it will help you to solve it by yourself)

2 EO2 + 4 KOH + O2 → 2 K2EO4 + 2 H2O
and
3 K2EO4 + 2 CO2 → 2 KEO4 + 2 K2CO3 + EO2

so oxide will be EO2

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