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The standard electrode potentials for th...

The standard electrode potentials for the reactions
`Ag^(+)(aq)+e^(-)rarrAg(s)`
`Sn^(2+)(aq)+2e^(-)rarrSn(s)`
at `25^(@)C` are 0.80 V and -0.14 V respectively The emf of the cell `Sn|Sn^(2+)(1 M)|| Ag^(+)(1 M)|Ag` is

A

0.48 V

B

0.80 V

C

1.08 V

D

0.94 v

Text Solution

Verified by Experts

The correct Answer is:
C
EMF of the cell =0.80 V-(-0.14)V
=0.80 V+ 0.14 V=1.75 v`
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The standard electrode potential for the reactions, Ag^(+)(aq)+e^(-) rarr Ag(s) Sn^(2+)(aq)+2e^(-) rarr Sn(s) at 25^(@)C are 0.80 volt and -0.14 volt, respectively. The emf of the cell Sn|Sn^(2+)(1M)||Ag^(+)(1M)Ag is :

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Use the standard reduction potentials: Sn^(2+)(aq) + 2e^(-) rightarrow Sn(s) E^(@) = -0.141V Ag^(+)(aq) + e^(-) rightarrow Ag(s) E^(@) = 0.800V To calcultate E^(@) for the reaction: Sn(s) + 2Ag^(+)(aq) rightarrow Sn^(2+)(aq) + 2Ag(s)

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MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS-ELECTROCHEMISTRY-Exercise 1
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