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# Calculate the E.M.F of the Following Cell Reaction at 298 K: Mg_(S) + Cu^(2+) (0.0001 M) -> Mg^(2+) (0.0001m) + Cu_(S) The Standard Potential (E^@)Of the Cell Is 2.71 V - ISC (Arts) Class 12 - Chemistry (Theory)

ConceptGalvanic Cells, Mechanism of Current Production in a Galvanic Cell; Mechanism of Production of Electric Current in a Galvanic Cell

#### Question

Calculate the e.m.f of the following cell reaction at 298 K:

Mg_(s) + Cu^(2+) (0.0001 M) -> Mg^(2+) (0.0001M) + Cu_(s)

The standard potential (E^@)of the cell is  2.71 V

#### Solution

Mg  + Cu^(2+) -> Mg^(2+) + Cu

Q = [Mg^(2+)]/[Cu^(2+)] = (10^(-3))/(10^(-4)) = 10

n = 2

E_"cell" = E_"cell"^0 - 0.0592/n log_10 Q

= 2.71 - 0.0592/2 log_10 10

= 2.71 - 0.0296

E_"cell" = 2.68 V

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#### APPEARS IN

2014-2015 (March) (with solutions)
Question 4.2.1 | 2.00 marks
Solution Calculate the E.M.F of the Following Cell Reaction at 298 K: Mg_(S) + Cu^(2+) (0.0001 M) -> Mg^(2+) (0.0001m) + Cu_(S) The Standard Potential (E^@)Of the Cell Is 2.71 V Concept: Galvanic Cells, Mechanism of Current Production in a Galvanic Cell; - Mechanism of Production of Electric Current in a Galvanic Cell.
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