Gce Model Questions Vol1 2018 Chemistry Question 10
Practice objective / multiple choice question 10 from the 2018 Gce Model Questions Vol1 Chemistry examination.
Solid zinc is placed in a 0.010 M solution of copper(II) nitrate that also contains 0.10 M ammonia. The reaction is \(\ce{Zn(s) + Cu^{2+}(aq) -> Zn^{2+}(aq) + Cu(s)}\). Standard reduction potentials are \(E^{\circ}_{\ce{Cu^{2+}/Cu}} = +0.34\) V and \(E^{\circ}_{\ce{Zn^{2+}/Zn}} = -0.76\) V. Ammonia complexes copper(II) according to \(\ce{Cu^{2+} + 4NH3 <=> [Cu(NH3)4]^{2+}}\) with a formation constant \(K_f = 1.0\times10^{13}\). Assuming the total copper(II) concentration remains 0.010 M, calculate the cell potential under these conditions at 25 °C (ignore activity coefficients).
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This is Gce Model Questions Vol1 2018 Chemistry Question 10. It is one of the objective questions from the 2018 Gce Model Questions Vol1 Chemistry examination.
Difficulty level: Hard .
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