Gamma Question Bank for Medical Chemistry>Chapter 17 - Electrochemistry>EXERCISE>Q 22

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Consider the following equations for a cell reaction:

$A + B ⟶ C + D; E ° = x volt, ΔG = {ΔG}_{1}$

$2 A + 2 B ⟶ 2 C + 2 D; E ° = y$ volt, $ΔG = {ΔG}_{2}$

Then,

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Important Questions on Electrochemistry

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Gamma Question Bank for Medical Chemistry>Chapter 17 - Electrochemistry>EXERCISE>Q 23

Zn |{Zn}_{(C_{1})}^{2 +}| |{Zn}_{(C_{2})}^{2 +}| Zn (s)

. The

ΔG

is -ve if

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Gamma Question Bank for Medical Chemistry>Chapter 17 - Electrochemistry>EXERCISE>Q 24

Calculate the half cell potential at

298 K

for the reaction,

{Zn}^{+ 2} + 2 e^{-} ⟶ Zn

if

[{Zn}^{+ 2}] = 2 M

,

E_{{Zn}^{n + 2} / Zn} ° = - 0.76 V

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Gamma Question Bank for Medical Chemistry>Chapter 17 - Electrochemistry>EXERCISE>Q 25

For the reaction

{Fe}^{+ 2} (aq) + {Ag}^{+} (aq) ⟶ Ag (s) + {Fe}^{+ 3} (aq)

. Predict which change will decrease the cell voltage?

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Gamma Question Bank for Medical Chemistry>Chapter 17 - Electrochemistry>EXERCISE>Q 26

Calculate $ΔG °$ for the galvanic cell:

$2 Cr (s) + 3 {Cd}^{+ 2} (aq) ⟶ 2 {Cr}^{+ 3} (aq) + 3 Cd (s)$

$E_{{Cr}^{+ 3} / Cr}^{0} = - 0.74 V, E_{{Cd}^{+ 2} / Cd}^{0} = - 0.40 V$

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Gamma Question Bank for Medical Chemistry>Chapter 17 - Electrochemistry>EXERCISE>Q 27

Nernst equation is useful in determining

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Gamma Question Bank for Medical Chemistry>Chapter 17 - Electrochemistry>EXERCISE>Q 28

If the standard electrode potential of

{Cu}^{2 +} / Cu

electrode is

0.34 V

, what is the electrode potential of

0.1 M

concentration of

{Cu}^{2 +} ?

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Gamma Question Bank for Medical Chemistry>Chapter 17 - Electrochemistry>EXERCISE>Q 29

If

\frac{{Cu}^{2 +}}{Cu}

electrode is diluted

100

times, then the change in emf is

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Gamma Question Bank for Medical Chemistry>Chapter 17 - Electrochemistry>EXERCISE>Q 30

For a spontaneous reaction

ΔG,

equilibrium constant

(K)

and

{E^{o}}_{cell}

will be respectively: