Given- standard reduction potentials for half reactions-A - e- A- E0-veB - e- B- E0 - -veWhich of the following statements is-are true-

Standard reduction potentials (SRP) of the half cell electrodes are calculated and arranged nbsp;in nbsp;a series of increasing order which is known as elec ...

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Standard VII

Chemistry

Gibb's Energy and Nernst Equation

Given, standa...

Question

Given, standard reduction potentials for half reactions:
$A + e^{-} \to A^{-}; E^{0} = - v e$
$B + e^{-} \to B^{-}; E^{0} = + v e$
Which of the following statement(s) is/are true?

For a spontaneous process,
A will act as anode and B will act as cathode

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For a non-spontaneous process,
A will act as anode and B will act as cathode

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A is easily reduced

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None of the above

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Solution

The correct option is A For a spontaneous process,
A will act as anode and B will act as cathode
Standard reduction potentials (SRP) of the half cell electrodes are calculated and arranged in a series of increasing order which is known as electrochemical series.
The standard electrode potential of $H^{+} / H_{2}$ couple is zero.

A positive $E^{0}$ signifies that it has high tendency to get reduced and the redox couple is a stronger oxidising agent than the $H^{+} / H_{2}$ couple.

Negative $E^{0}$ signifies that it has high tendency to get oxidised and the redox couple is a stronger reducing agent than the $H^{+} / H_{2}$ couple.

Thus, A is easily oxidised to $A^{-}$

For a spontaneous process, $E_{c e l l}^{0}$ should be a positive value.
$E_{c e l l}^{\circ} = SRP of substance reduced - SRP of substance oxidised$
(SRP - Standard reduction potential)

$E_{c e l l}^{\circ} = E_{c a t h o d e (r e d)}^{\circ} - E_{a n o d e (r e d)}^{\circ}$
$E_{c e l l}^{\circ} = (+ v e) - (- v e)$
$E_{c e l l}^{\circ} = + v e$

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Similar questions

Q. Given Standard reduction potentials for half reactions:

A + e^{-} \to A^{-}; E^{0} = - v e

B + e^{-} \to B^{-}; E^{0} = + v e

Which of the following statement(s) is/are true?

Q. For

M^{2 +} / M and M^{3 +} / M^{2 +}

systems,

E^{0}

values for some metals are as follows:

C r^{2 +} (a q) + 2 e^{-} \to C r (s); E^{0} = - 0.91 V C r^{3 +} (a q) + e^{-} \to C r^{2 +} (a q); E^{0} = - 0.41 V

M n^{2 +} (a q) + 2 e^{-} \to M n (s); E^{0} = - 1.2 V M n^{3 +} (a q) + e^{-} \to M n^{2 +} (a q); E^{0} = + 1.51 V

F e^{2 +} (a q) + 2 e^{-} \to F e (s); E^{0} = - 0.44 V F e^{3 +} (a q) + e^{-} \to F e^{2 +} (a q); E^{0} = + 0.77 V

Which of the following statement(s) is/are correct regarding the given standard reduction potentials?

Q. Which of the following statement is true regarding the given standard reduction potential?
Given:

A g^{+} + e^{-} \to A g; E^{0} = + 0.8 V N i^{2 +} + 2 e^{-} \to N i; E^{0} = - 0.25 V .

Q. Which of the following statement is true regarding the given standard potential?

A g^{+} + e^{-} \to A g; E^{0} = + 0.8 V S n^{2 +} + 2 e^{-} \to S n; E^{0} = - 0.14 V

Q. Standard reduction potential values for the electrodes are given below

M g^{2 +} + 2 e^{-} \to M g; E^{0} = - 2.37 V

Z n^{2 +} + 2 e^{-} \to Z n; E^{0} = - 0.76 V

F e^{2 +} + 2 e^{-} \to F e; E^{0} = - 0.44 V

Which of the following statements is correct?

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Given, standard reduction potentials for half reactions: A+e−→A−;E0=−ve B+e−→B−;E0=+ve Which of the following statement(s) is/are true?

Given, standard reduction potentials for half reactions:
$A + e^{-} \to A^{-}; E^{0} = - v e$
$B + e^{-} \to B^{-}; E^{0} = + v e$
Which of the following statement(s) is/are true?