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Standard VII

Chemistry

Conductance and Conductivity

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Question

How would you determine the standard electrode potential of the system ${Mg}^{2 +} | Mg$ ?

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Solution

Standard electrode potential of ${Mg}^{2 +} | Mg$

The standard electrode petential of ${Mg}^{2 +} | Mg$ can be measured with respect to the standard hydrogen electrode, represented by $H^{+} (a q, 1 M) | P t (s) | H_{2} (g), 1 bar$ .

A cell, consisting of ${Mg}^{2 +} | Mg (a q, 1 M)$ as the anode and the standard hydrogen electrode $H^{+} (a q, 1 M) | P t (s) | H_{2} (g), 1 bar$ as the cathode.

The cell represented as
$M g | m g (a q, 1 M) | | H^{+} (a q, 1 M) | P t (s) | H_{2} (g), 1 bar$

Thus, emf of cell, $E_{c e l l}^{\circ} = E_{r i g h t}^{\circ} - E_{l e f t}^{\circ}$

The potential of standard hydrogen electrode is always zero.

Therefore,

$E_{r i g h t}^{\circ} = 0$

Hence,
$E_{c e l l}^{\circ} = - E_{{Mg}^{2 +} | Mg}^{\circ}$
$E_{{Mg}^{2 +} | Mg}^{\circ} = - E_{c e l l}^{\circ}$

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Similar questions

Q. Electrode potential for Mg electrode varies according to the equation

E_{M} g^{2} + | M g

E_{M} g^{2} + | M g^{Θ}

\frac{0.059}{2} l o g \frac{1}{[M g^{2 +}]}

. The graph of

E_{M g^{2 +} | M g}

l o g [M g^{2 +}]

Given the standard electrode potentials,

$\frac{K^{+}}{K} = - 2.93 V,$

$\frac{A g^{+}}{A g} = 0.80 V$

$\frac{H g^{2 +}}{H g} = 0.79 V,$

$\frac{M g^{2 +}}{M g} = - 2.37 V$

$\frac{C r^{3 +}}{C r} = - 0.74 V$

Arrange these metals in their increasing order of reducing power.

Q. Given the standard electrode potentials,

K^{+} / K = - 2.93 V, A g^{+} / A g = 0.80 V,

H g^{2 +} / H g = 0.79 V, M g^{2 +} / M g = - 2.37 V, C r^{3 +} / C r = - 0.74 V

Arrange these metals in their increasing order of reducing power.

How would you determine the standard electrode potential of the systemMg²⁺| Mg?

In the answer why SHE is only taken as cathode,why not anode?

Electrode potential for Mg electrode varies according to the equation:

$E_{M g^{2 +} / M g} = E_{M g^{2 +} / M g}^{0} - \frac{0.059}{2} log \frac{1}{[M g^{2 +}]}$

The graph of $E_{M g^{2 +} / M g}$ vs $log [M g^{2 +}]$ is

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Conductance and Conductivity

Standard VII Chemistry

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How would you determine the standard electrode potential of the system Mg2+|Mg ?

How would you determine the standard electrode potential of the system ${Mg}^{2 +} | Mg$ ?