Find Kc for the reaction- Cu2-aq - Sn2-aq - Sn4-aq-Cus at 25-C Given- E-Cu2-Cu - 0-34V- E-Sn4-Sn2- - 0-15V

The correct option is A 2.618 × 10^6 The expression for the standard cell potential is E^0_cell=E^0_Cu2+|Cu E^0_Sn4+|Sn2+ Substitute values in the ab ...

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Byju's Answer

Standard XII

Chemistry

Equilibrium Constant from Nernst Equation

Find Kc for...

Question

Find $K_{c}$ for the reaction:
$C u^{2 +} (a q) + S n^{2 +} (a q) ⟶ S n^{4 +} (a q) + C u (s)$ at $25^{\circ} C$
(Given: $E_{C u^{2 +} | C u}^{\circ} = 0.34 V; E_{S n^{4 +} | S n^{2 +}}^{\circ} = 0.15 V$ )

2.618 \times 10^{6}

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8.418 \times 10^{6}

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4.618 \times 10^{6}

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None of these

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Solution

The correct option is A $2.618 \times 10^{6}$
The expression for the standard cell potential is $E_{c e l l}^{0} = E_{C u 2 + | C u}^{0} - E_{S n 4 + | S n 2 +}^{0}$
Substitute values in the above expression.
$E_{c e l l}^{0} = 0.34 V - 0.15 V = 0.19 V$
The expression for the equilibrium constant K is $l o g K = \frac{n E^{0}}{0.0592}$
Substitute values in the above expression.
$l o g K = \frac{2 \times 0.19}{0.0592} = 6.418$
Hence, the value of the equilibrium constant is $2.618 \times 10^{6}$

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Similar questions

Q. The electrode potentials for :

C u^{2 +} (a q) + e^{-} \to C u^{+} (a q)

and

C u^{+} (a q) + e^{-} \to C u (s)

are +0.15V and +0.50V respectively. The value of

E_{C u^{2 +} / C u}^{\circ}

will be:

Q. Calculate

E_{C e l l}^{o}

value of the following reactions:

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

[Given:

E_{C u^{2 +} / C u}^{\circ} = 0.34 V, E_{Z n^{2 +} / Z n}^{\circ} = - 0.76 V

]

Q. Approximate

K_{c}

for the reaction at

25^{o} C

will be:

Z n (s) + {C u}^{2 +} (a q) = {Z n}^{3 +} (a q) + C u (s)

E_{{Z n}^{2 +} / Z n}^{o} = - 0.76 V E_{C u / {C u}^{2 +}}^{o} = - 0.34 V

Q. Calculate

E^{\circ}

values of following reactions:

C u_{(s)} + Z n_{(a q)}^{2 +} \to Z n_{(s)} + C u_{(a q)}^{2 +}

[Given:

E_{C u^{2 +} / C u}^{0} = 0.34 V, E_{Z n^{2 +} / Z n}^{0} = - 0.76 V

]

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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Find Kc for the reaction:Cu2+(aq)+Sn2+(aq)⟶Sn4+(aq)+Cu(s) at 25∘C (Given: E∘Cu2+|Cu=0.34V; E∘Sn4+|Sn2+=0.15V)

Find $K_{c}$ for the reaction:
$C u^{2 +} (a q) + S n^{2 +} (a q) ⟶ S n^{4 +} (a q) + C u (s)$ at $25^{\circ} C$
(Given: $E_{C u^{2 +} | C u}^{\circ} = 0.34 V; E_{S n^{4 +} | S n^{2 +}}^{\circ} = 0.15 V$ )