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2Al(s)+2Cu^(2+)(aq)rarr2Al^(3+)(aq)+2Cu(...

`2Al(s)+2Cu^(2+)(aq)rarr2Al^(3+)(aq)+2Cu(s)`
What value should be used for n in the Nernst equation to determine the effect of changes in `Al^(3+)`(aq) and `Cu^(2+)` (aq) concentrations in this reaction?

A

6

B

5

C

3

D

2

Text Solution

Verified by Experts

The correct Answer is:
A
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Write Nernst equation for the following cell reaction : Zn(s) | Zn^(2+)(aq)|| Cu^(2+)(aq) | Cu(s)

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Knowledge Check

  • Zn(s) + Cu^(2+)(aq) rarr Zn^(2+)(aq) + Cu(s) The cell representation for the above redox reaction is

    A
    `Cu(s)| Cu^(2+)(aq) || Zn^(2+)(aq) | Zn(s)`
    B
    `Zn(s) | Zn^(2+)(aq) || Cu^(2+)(aq) | Cu(s)`
    C
    `Cu(s) | Cu^(2+)(aq) || Zn(s) | Zn^(2+)(aq)`
    D
    `Zn(s)|Zn^(2+)(aq) || Cu(s) | Cu^(2+)(aq)`

  • The correct representation of Nernst equation for half-cell ,reaction Cu^(2+) (aq) + e^(-) to Cu^(+) (aq) is

    A
    `E_(cu^(+),cu^(2+))^(@) = E_(cu^(+),cu^(2+))^(@) - (0.0592)/(2) log .([Cu^(+)])/([Cu^(2+)])`
    B
    `E_(cu^(+),cu^(2+))^(@) = E_(cu^(+),cu^(2+))^(@) - (0.0592)/(1) log .([Cu^(+)])/([Cu^(2+)])`
    C
    `E_(cu^(+),cu^(2+))^(@) = E_(cu^(+),cu^(2+))^(@) - (0.0592)/(2) log .([Cu^(+)])/([Cu^(2+)])`
    D
    `E_(cu^(+),cu^(2+))^(@) = E_(cu^(+),cu^(2+))^(@) - (0.0592)/(1) log .([Cu^(+)])/([Cu^(2+)])`

  • In the reaction , Cu(s)+2Ag^(+)(aq)rarrCu^(2+)(aq)+2Ag(s) , the reduction half cell reaction is

    A
    `Cu+2e^(-)rarrCu^(2+)`
    B
    `Cu-2e^(-)rarrCu^(2+)`
    C
    `Ag^(+)+e^(-)rarrAg`
    D
    `Ag^(-)e^(-)rarrAg^(+)`

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