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Chemistry
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Chemistry
Standard Electrode Potential (3)
Chemistry
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Standard Electrode Potential (3)
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The electrode potential of zinc
Since the standard hydrogen potential is 0.00 V, the voltmeter reading of 0.76 V shows the electrode potential of zinc
Tendency of zinc to release electrons compared to hydrogen
Zinc, Zn has a greater tendency to release electrons compared to hydrogen
Half equation at the negative terminal (oxidation reaction)
Zn(s) → Zn2+(aq) + 2e−
Half equation at the positive terminal (reduction reaction
2H+(aq) + 2e− → H2 (g)
A standard electrode potential for zinc half-cell is written as reduction
Zn2+(ak) + 2e− ⇌ Zn(p) E° = -0.76 V
Another name for standard electrode potential, E°
Is also known as the standard reduction potential
E° value
Is a measure of the tendency of a substance to accept or donate electrons
The standard electrode potential value, E° for half-cell equations [Li+(aq) + e− ⇌ Li(s)]
-3.04 V
The standard electrode potential value, E° for half-cell equations [K+(aq) + e− ⇌ K(s)]
-2.92 V
The standard electrode potential value, E° for half-cell equations [Ca2+(aq) + 2e− ⇌ Ca(s)]
-2.87 V
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Standard Electrode Potential (3)
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