Chemistry - Electrochemistry Question with Solution | TestHub

ChemistryElectrochemistryGalvanic cells/Nernst Equation/Concentration CellsMedium2 minQB

ChemistryMediummultiple choice

Consider the cell

Cd(s) | Cd²⁺(1.0 M) || Cu²⁺ (1.0 M) | Cu(s)

If we wish to make a cell with a more positive voltage using the same substances, we should

Answer:

B, C

Solution:

For the reaction:

$C d + C u^{2 +} \to C d^{2 +} + C u$

The Nernst equation is given by:

$E = E^{\circ} - \frac{0.0591}{n} lo g \frac{[ C d ^{2 +} ]}{[ C u ^{2 +} ]}$

The voltage increases when $[C d^{2 +}]$ decreases or $[C u^{2 +}]$ increases. Thus, (b) and (c) are correct.

Stream:JEESubject:ChemistryTopic:ElectrochemistrySubtopic:Galvanic cells/Nernst Equation/Concentration Cells

⏱ 2mℹ️ Source: QB

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