Chemistry Question?

Consider the following reaction at 298K.

Ni2+ (aq) + Hg (l) Ni (s) + Hg2+ (aq)

Which of the following statements are correct?

Choose all that apply.

a) The reaction is reactant-favored.

b) ΔGo < 0

c) K > 1

d) Eocell < 0

e) n = 2 mol electrons

1 Answer

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  • 1 year ago
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    Ni²(aq) + 2e⁻ → Ni(s) …… E₁°

    Hg²(aq) + 2e⁻ → Hg(s) …… E₂°

    The overall equation:

    Ni²(aq) + Hg(l) → Ni(s) + Hg²(aq) …… E°(cell)

    The reaction involves 2 mol electrons …… e) is true

    As Ni is more reactive than Hg, E₂° > E₁°

    Hence, E°(cell) = E₁° - E₂° < 0 …… d) is true

    E°(cell) = (RT/nF) ln(K)

    As E°(cell) < 0, K < 1 …… (c) is false

    As K < 1, the reaction lies to the reactant side …… a) is true

    ΔG° = -n F E°(cell)

    As E°(cell) < 0, ΔG° > 0 …… b) is false

    The answers: a), d), e)

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