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Preparations and Uses of Caustic Soda

Which of the ...

Question

Which of the following is the cell representation for the given cell reaction?
$Z n (s) + C u^{2 +} (a q) \to Z n^{2 +} (a q) + C u (s)$

Z n (s) | Z n^{2 +} (a q) | | C u^{2 +} (a q) | C u (s)

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C u (s) | C u^{2 +} (a q) | | Z u^{2 +} (a q) | Z n (s)

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C u (s) | Z n^{2 +} (a q) | | Z n (s) | C u^{2 +} (a q)

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C u^{2 +} (a q) | Z n (s) | | Z n^{2 +} (a q) | C u (s)

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Solution

The correct option is A
$Z n (s) | Z n^{2 +} (a q) | | C u^{2 +} (a q) | C u (s)$
In the given cell reaction,
$Z n$ is oxidised to $Z n^{2 +}$ and $C u^{2 +}$ is reduced to $C u$ .

At cathode: $C u^{2 +} (a q) + 2 e^{-} \to C u (s)$

At anode : $Z n (s) \to Z n^{2 +} (a q) + 2 e^{-}$

Rules for Cell representation:
1. Anode half cell should be on left side and cathode half cell should be on right side.

2. Separation of two phase should be shown by vertical line $(∣)$ . This line indicates phase boundary.

3. If various material present in the same phase, it should be shown together with commas (,).

4. The salt bridge is represented by double slash $(∣∣)$ between the two half cells.

5. The significant features of the substance like pressure of a gas, concentration of ions, etc. should be indicated in brackets immediately after writing the substance.

By following the above rules, the cell representation of the given cell reaction is
$Z n (s) | Z n^{2 +} (a q) | | C u^{2 +} (a q) | C u (s)$

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Similar questions

Q. Represent the galvanic cell in which the reaction takes place.

Z n (s) + {C u}^{2 +} (a q) \to {Z n}^{2 +} (a q) + C u (s)

$E^{0}$ for the cell, $Z n | Z n {^{2 +}}_{(a q)} | | C u {^{2 +}}_{(a q)} | C u$ is $1.10 V$ at $25^{0} C$ . The equilibrium constant for $Z n + C u {^{2 +}}_{(a q)} \to Z n {^{2 +}}_{(a q)} + C u$ the cell reaction is of the order of :

E^{\circ}

for the electrochemical cell,

Z n (s) | Z n^{2 +} 1 M (a q .) ∥ C u^{2 +} 1 M (a q .) | C u (s)

1.10 V

25^{\circ} C

. The equilibrium constant for the cell reaction,

Z n (s) + C u^{2 +} (a q .) ⇌ Z n^{2 +} (a q .) + C u (s)

will be:

E^{\circ}

for the cell,

{Zn(s)|Zn}^{2 +} (aq) | | {Cu}^{2 +} (aq)|Cu(s)

1.10

V at

25^{\circ} C

. The equilibrium constant for the reaction,

Zn(s) + {Cu}^{2 +} (aq) \to Cu(s) + {Zn}^{2 +} (aq)

1.94 \times 10^{x}

. The value of

x

E^{\circ}

for the cell is

Z n | Z n^{2 +} (a q) | | C u^{2 +} (a q) | C u

25^{\circ} C

, the equilibrium constant for the reaction

Z n + C u^{2 +} (a q) ⇌ C u + Z n^{2 +} (a q)

is of the order of

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Preparations and Uses of Caustic Soda

Standard XII Chemistry

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Which of the following is the cell representation for the given cell reaction? Zn(s)+Cu2+(aq)→Zn2+(aq)+Cu(s)

Which of the following is the cell representation for the given cell reaction?
$Z n (s) + C u^{2 +} (a q) \to Z n^{2 +} (a q) + C u (s)$