Chemistry - Electrochemistry Question with Solution | TestHub

ChemistryElectrochemistryMiscellaneous/MixedEasy2 minPYQ_2020
ChemistryEasysingle choice

For the following electrochemical cell at 298 K,

PtsH2g,1 barH+aq,1M|M4+aq,M2+aqPts

Ecell=0.092Vwhen[M2+aq][M4+aq]=10x

Given: E M 4+ | M 2+ 0 =0.151V;2.303 RT F =0.059 V

The value of x is

Options:

Answer:
D
Solution:

Anode:H2s��2H++2e-

Cathode:Mn4++2e-Mn2+

Mn4++H2Mn2++2H+¯

E=E°-0.0592log10Mn2+H+2Mn4+PH2

0.092=0.151-0.0592log10(10x) 

0.092=0.151-0.0592x

x=2

Stream:NTA_ABHYASSubject:ChemistryTopic:ElectrochemistrySubtopic:Miscellaneous/Mixed
2mℹ️ Source: PYQ_2020

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