A student constructed an electrochemical cell by using two electrodes- Zn-Zn -8203-2-1M- and Mg-Mg2-1M- and represented it as Zn-Zn2-1M-Mg2-1M-Mg-Is the representation correct- Justify- Given E0Mg2-Mg-2-37V-E0 -8203-Zn2-Zn -8203-0-76V

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Electric Potential and Potential Difference

A student con...

Question

A student constructed an electrochemical cell by using two electrodes: Zn/Zn²⁺(1M) and Mg/Mg²⁺(1M) and represented it as Zn/Zn²⁺(1M)||Mg²⁺(1M)/Mg.
Is the representation correct? Justify. Given E⁰_Mg2_+/Mg=-2.37V;E⁰_Zn2+/Zn=-0.76V

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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

Below given are emf of three galvanic cells, represented by $E_{1}$ , $E_{2}$ and $E_{3}$ . Which of the following is true?

I. $Z n | Z n^{2 +} (1 M) | | C u^{2 +} (1 M) | C u$

II. $Z n | Z n^{2 +} (0.1 M) | | C u^{2 +} (1 M) | C u$

III. $Z n | Z n^{2 +} (1 M) | | C u^{2 +} (0.1 M) | C u$

C u | C u^{2 +} (1 M) | | A g^{+} (1 M) | A g, E^{0} = 0.46 V

Z n | Z n^{2 +} (1 M) | | C u^{2 +} (1 M) | C u, E^{0} = 1.10 V

Z n | Z n^{2 +} (1 M) | | A g^{+} (1 M) | A g

E^{o}

M g^{2 +} / M g = - 2.37 V, Z n^{2 +} / Z n = - 0.76 V

F e^{2 +} / F e = - 0.44 V

E_{1}, E_{2}

E_{3}

Z n | Z n^{2 +} (1 M) | | C u^{2 +} (1 M) | C u

Z n | Z n^{2 +} (0.1 M) | | C u^{2 +} (1 M) | C u

Z n | Z n^{2 +} (1 M) | | C u^{2 +} (0.1 M) | C u

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