Qualitatively explain the effect of changing concentration of Cu2+ on voltage using your experimental observations and the Keq values below.

Question

Qualitatively explain the effect of changing concentration of Cu2+ on voltage using your experimental observations and the Keq values below. (No calculations are required).
(a) Cu^2+(aq) + 4NH3(aq) ⇄ [Cu(NH^3)4]^2+(aq) Keq = 1.2 x 10^12
(b) CuS(s) ⇄ Cu^2+(aq) + S^2-(aq) , Keq = 8.5 x 10^-45
Cu/Zn = 0.525 V
after 1 drop NH3: 0.505 V
after 2 drops NH3: 0.435 V
Cu/Zn = 0.510 V
after 1 drop Na2S: 0.452 V
after 2 drops Na2S: 0.393 V

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Thiên Hương 1 year 2021-07-31T10:43:24+00:00 1 Answers 8 views 0

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    2021-07-31T10:45:12+00:00

    its the second one hope this helps

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