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18 Nov 2019
Questions 17 and 18 refer to the following two half- reactions: O_2 + 4H^+ + 4e^- rightarrow 2H_2O E degree = + 1.23 V PbO_2 + 4H^+ + 2e^- rightarrow Pb^2+ + 2H_2O E degree = + 1.46 V If the two half-reactions combine to form a spontaneous system, what is the net balanced equation of the full reaction? A. 2PbO_2 + 8H^+ rightarrow 2Pb^2+ + O_2 + 4H_2O B. PbO_2 rightarrow Pb^2+ + O_2 + 2e^- C. Pb^2+ + O_2 + 2H_2O rightarrow 2PbO_2 + 4H^+ D. 2PbO_2 + 4H^+ rightarrow 2Pb^2+ + O_2 + 2H+_2O Find the standard potential of the following reaction: Pb^2+ + O_2 + 2H_2O rightarrow 2PbO_2 + 4H^+ A. +0.23 V B. -0.23 V C. -1.69 V D. +2.69 V
Questions 17 and 18 refer to the following two half- reactions: O_2 + 4H^+ + 4e^- rightarrow 2H_2O E degree = + 1.23 V PbO_2 + 4H^+ + 2e^- rightarrow Pb^2+ + 2H_2O E degree = + 1.46 V If the two half-reactions combine to form a spontaneous system, what is the net balanced equation of the full reaction? A. 2PbO_2 + 8H^+ rightarrow 2Pb^2+ + O_2 + 4H_2O B. PbO_2 rightarrow Pb^2+ + O_2 + 2e^- C. Pb^2+ + O_2 + 2H_2O rightarrow 2PbO_2 + 4H^+ D. 2PbO_2 + 4H^+ rightarrow 2Pb^2+ + O_2 + 2H+_2O Find the standard potential of the following reaction: Pb^2+ + O_2 + 2H_2O rightarrow 2PbO_2 + 4H^+ A. +0.23 V B. -0.23 V C. -1.69 V D. +2.69 V
Sixta KovacekLv2
31 Oct 2019