Choose the correct shorthand notation for standard oxidation potential of the given half reactions.

$(a) C H_{3} C O O^{-} (a q) + 4 H_{2} O (a q) ⇌ 2 H C O_{3}^{-} (a q) + 9 H^{+} (a q) + 8 e^{-}$

$(b) C (s) + 2 H_{2} O (a q) ⇌ C O_{2} (a q) + 4 H^{+} (a q) + 4 e^{-}$

a. E_{C H_{3} C O O^{-} (a q) / H C O_{3}^{-} (a q)}^{\circ}

b. E_{C (s) / C O_{2} (g)}^{\circ}

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a. E_{C H_{3} C O O^{-} (a q) / H C O_{3}^{-} (a q)}^{\circ}

b. E_{C O_{2} (g) / C (s)}^{\circ}

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a. E_{H C O_{3}^{-} (a q) / C H_{3} C O O^{-} (a q)}^{\circ}

b. E_{C (s) / C O_{2} (g)}^{\circ}

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a. E_{H C O_{3}^{-} (a q) / C H_{3} C O O^{-} (a q)}^{\circ}

b. E_{C O_{2} (g) / C (s)}^{\circ}

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Solution

The correct option is A $a. E_{C H_{3} C O O^{-} (a q) / H C O_{3}^{-} (a q)}^{\circ}$
$b. E_{C (s) / C O_{2} (g)}^{\circ}$
Electrode potential for oxidation half cell reaction is called oxidation potential. The corresponding electrode is termed as negative electrode.
For a given oxidation half cell reaction,
$M (s) \to M^{n +} (a q) + n e^{-}$

The shorthand notation for oxidation potential is
$E_{M (s) / M^{n +} (a q)}^{\circ}$

In (a), $C H_{3} C O O^{-}$ is oxidised to $H C O_{3}^{-}$

In (b), $C (s)$ is oxidised to $C O_{2}$

Thus, the shorthand notation for standard oxidation potential of the given reaction are
$a. E_{C H_{3} C O O^{-} (a q) / H C O_{3}^{-} (a q)}^{\circ}$
$b. E_{C (s) / C O_{2} (g)}^{\circ}$

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Similar questions

Q. Choose the correct shorthand notation for standard reduction potential of the given reactions.

(a) H g_{2}^{2 +} (a q) + 2 e^{-} ⇌ 2 H g (l)

(b) F e^{3 +} (a q) + e^{-} ⇌ F e^{2 +} (a q)

Q. Given the standard oxidation potentials:

E_{F e (s) / F e^{2 +} (a q)}^{0} = 0.44 V

E_{F e^{2 +} (a q) / F e^{3 +} (a q)}^{0} = - 0.77 V

The standard EMF of the given reaction will be:

F e (s) + 2 F e^{3 +} (a q) \to 3 F e^{2 +} (a q)

Standard electrode potential data are useful for understanding the suitability of an oxidant in a redox Titration. Some half – cell reactions and their standard potential are given below:
$M n O_{4}^{-} (a q) + 8 H^{+} (a q) + 5 e^{-} \to M n^{2 +} (a q) + 4 H_{2} O (I); E^{\circ} = 1.51 V$
$C r_{2} O_{7}^{2 -} (a q) + 14 H^{+} (a q) + 6 e^{-} \to 2 C r^{3 +} (a q) + 7 H_{2} O (I); E^{\circ} = 1.38 V$
$F e^{3 +} (a q) + e^{-} \to F e^{2 +} (a q); E^{\circ} = 0.77 V$
$C l_{2} (g) + 2 e^{-} \to 2 C l^{-} (a q); E^{\circ} = 1.40 V$

Identify the only incorrect statement regarding the quantitative estimation of aqueous $F e (N O_{3})_{2}$ .