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Which half equation is used as the standard for the electrode potentials? From the table identify: Strongest oxidizing agent Strongest reducing agent

Chemistry

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Answer

a

2H+(aq)+2e−⇌H2(g)2\text{H}^+(\text{aq}) + 2\text{e}^- \rightleftharpoons \text{H}_2(\text{g})

Haya hapa majibu kwa maswali yako:

a) Which half equation is used as the standard for the electrode potentials?
Mlinganyo wa nusu-mmenyuko unaotumika kama kiwango (standard) kwa uwezo wa elektrodi ni ule wa Standard Hydrogen Electrode (SHE), ambao una uwezo wa elektrodi wa 0.00 V.

2H+(aq)+2e−⇌H2(g)\boxed{2\text{H}^+(\text{aq}) + 2\text{e}^- \rightleftharpoons \text{H}_2(\text{g})}

b) From the table identify:

i) Strongest oxidizing agent
Wakala wa oksidesheni wenye nguvu zaidi ni spishi iliyo upande wa kushoto wa mlinganyo wa nusu-mmenyuko yenye thamani ya E° chanya zaidi.
Kutoka kwenye jedwali, thamani chanya zaidi ya E° ni +1.61 V, inayolingana na Ce4+(aq)+e−⇌Ce3+(aq)\text{Ce}^{4+}(\text{aq}) + \text{e}^- \rightleftharpoons \text{Ce}^{3+}(\text{aq}).
Kwa hivyo, wakala wa oksidesheni mwenye nguvu zaidi ni Ce4+(aq)\text{Ce}^{4+}(\text{aq}).

ii) Strongest reducing agent
Wakala wa upunguzaji (reducing agent) mwenye nguvu zaidi ni spishi iliyo upande wa kulia wa mlinganyo wa nusu-mmenyuko yenye thamani ya E° hasi zaidi.
Kutoka kwenye jedwali, thamani hasi zaidi ya E° ni -0.76 V, inayolingana na Zn2+(aq)+2e−⇌Zn(s)\text{Zn}^{2+}(\text{aq}) + 2\text{e}^- \rightleftharpoons \text{Zn}(\text{s}).
Kwa hivyo, wakala wa upunguzaji mwenye nguvu zaidi ni Zn(s)\text{Zn}(\text{s}).

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