Formative Assessment 4.4 Instruction: Clearly show all the necessary solutions. 1. When cadmium metal reduces Cu2+ in solution, Cd²+ forms in addition to copper metal. Given that AG°= – 142 kJ, calculate Kat 25 °C. What is Ecell of a voltaic - cell that uses this reaction? 2. Consider a voltaic cell based on the following reaction: Fe(s) + Cu(aq) + Fe2*(aq) + Cu(s) If [Cu2*] = 0.3 M, what must [Fe2*] be to increase Ecell by 0.25 V above Ecll %3D 25 °C?

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Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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Chapter1: Chemical Foundations
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Formative Assessment 4.4
Instruction: Clearly show all the necessary solutions.
1. When cadmium metal reduces Cu2+ in solution, Cd2+ forms in addition to copper
metal. Given that AG°= – 142 kJ, calculate Kat 25 °C. What is Eell of a voltaic
cell that uses this reaction?
2. Consider a voltaic cell based on the following reaction:
Fe(s) + Cu(aq) → Fe2*(aq) + Cu(s)
If [Cu2+] = 0.3 M, what must [Fe2+] be to increase Ecell by 0.25 V above Erell at
25 °C?
%3D
Transcribed Image Text:Formative Assessment 4.4 Instruction: Clearly show all the necessary solutions. 1. When cadmium metal reduces Cu2+ in solution, Cd2+ forms in addition to copper metal. Given that AG°= – 142 kJ, calculate Kat 25 °C. What is Eell of a voltaic cell that uses this reaction? 2. Consider a voltaic cell based on the following reaction: Fe(s) + Cu(aq) → Fe2*(aq) + Cu(s) If [Cu2+] = 0.3 M, what must [Fe2+] be to increase Ecell by 0.25 V above Erell at 25 °C? %3D
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