Zn^2+(aq) + 2e^- implies Zn(s); E degree = -0.76 V Cu2+(aq) + 2e- implies Cu(s);

Question

Zn^2+(aq) + 2e^- implies Zn(s); E degree = -0.76 V Cu2+(aq) + 2e- implies Cu(s); E degree = 0.34 V Cr_2Or^2-(aq) + 14H^+(aq) + 6e^- implies 2Cr^3+(aq) + 7H_2O(l); E degree = 1.33 V Which of the following species is the strongest oxidizing agent? Zn^2+ Zn Cu Cr_2Or^2- Cr^3+ Given: Pb^2+(aq) + 2e^- implies Pb(s); E degree = -0.13 V Mg^2+(aq) + 2e^- implies Mg(s); E degree = -2.38 V Ag^+(aq) + e^- implies Ag(s); E degree = 0.80 V 2H^+(aq) + 2e^- implies H_2(g); E degree = 0.00 V Under standard-state conditions, which of the following species is the best reducing agent? Pb Mg^2+ Ag^+ Ag H+2

Explanation / Answer

35. The strongest oxidizing agent will have highest +ve potential for half cell. Thus,

D) Cr2O7^2-

is strongest oxidizing agent

36. The best reducing agent will have highest -ve potential for the half reaction. thus,

B) Mg2+

Is the strongest reducing agent

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