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A voltaic cell consists of a Zn/Zn2+ half-cell and a Ni/Ni2+ half-cell at 25 °C. The initial concentrations of Ni2 + and Zn2+ are 1.60 moll-1 and 0.100 moll-1, respectively. Zn2+(aq) + 2e--> Zn(s)E = -0.76V Ni2 + (aq) + 2e--> Ni(s)E • = -0.23V The initial cell potential Ecell = 0.57 V What are the concentrations of Ni2+ and Zn2+ when the cell potential falls to 0.45 V? Express your answers using two significant figures separated by a comma.

A voltaic cell consists of a Zn/Zn2+ half-cell and a Ni/Ni2+ half-cell at 25 °C. The initial concentrations of Ni2 + and Zn2+ are 1.60 moll-1 and 0.100 moll-1, respectively. Zn2+(aq) + 2e--> Zn(s)E = -0.76V Ni2 + (aq) + 2e--> Ni(s)E • = -0.23V The initial cell potential Ecell = 0.57 V What are the concentrations of Ni2+ and Zn2+ when the cell potential falls to 0.45 V? Express your answers using two significant figures separated by a comma.

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
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A voltaic cell consists of a Zn/Zn2+ half-cell and a Ni/Ni2+ half-cell at 25 °C. The initial concentrations of Ni2+ and Zn2+ are 1.60 moll-1 and 0.100 molL-1, respectively. Zn2+(aq) + 2e--> Zn(s) E = -0.76V Ni2 + (aq) + 2e--> Ni(s)E • = -0.23V The initial cell potential Ecell = 0.57 V What are the concentrations of Ni2+ and Zn2+ when the cell potential falls to 0.45 V? Express your answers using two significant figures separated by a comma.
Transcribed Image Text:A voltaic cell consists of a Zn/Zn2+ half-cell and a Ni/Ni2+ half-cell at 25 °C. The initial concentrations of Ni2+ and Zn2+ are 1.60 moll-1 and 0.100 molL-1, respectively. Zn2+(aq) + 2e--> Zn(s) E = -0.76V Ni2 + (aq) + 2e--> Ni(s)E • = -0.23V The initial cell potential Ecell = 0.57 V What are the concentrations of Ni2+ and Zn2+ when the cell potential falls to 0.45 V? Express your answers using two significant figures separated by a comma.
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