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Electrochemistry question

2018 · Shift 1 · Q8

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PYQ Library
JEE Advanced
Chemistry
Electrochemistry
2018 · Shift 1 · Q8

Electrochemistry question

2018 · Shift 1 · Q8

JEE AdvancedChemistryElectrochemistryNumerical+3 / −1

For the electrochemical cell,

\left. {Mg\left( s \right)} \right|M{g^{2 + }}\left( {aq,1\,M} \right)\left\| {C{u^{2 + }}} \right.\left( {aq,1M} \right)\left| {Cu\left( s \right)} \right.

the standard

emf

of the cell is

2.70V

at

300K.

When the concentration of

M{g^{2 + }}

is changed to

xM,

the cell potential changes to

2.67V

at

300K.

The value of

x

is

\underline{\hspace{2cm}}

. (given,

{F \over R} = 11500\,K{V^{ - 1}},

where

F

is the Faraday constant and

R

is the gas constant, In

(10=2.30)

Numerical answer

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