Calculate E°cell and indicate whether the overall reaction shown is spontaneous or nonspontaneous.I2(s) + 2e- ----> 2I-(aq) E° = 0.30 VCd3+(aq) + 3e- -----> Cd(s) E° = -0.50 V E°cell = 0.20 V, spontaneous E°cell = 0.80 V, spontaneous E°cell = - 0.20 V, nonspontaneous E°cell = -0.80 V, nonspontaneous

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Answered: Calculate E°cell and indicate whether…

Calculate E°cell and indicate whether the overall reaction shown is spontaneous or nonspontaneous. I2(s) + 2e- ----> 2I-(aq) E° = 0.30 V Cd3+(aq) + 3e- -----> Cd(s) E° = -0.50 V

Chemistry: Principles and Reactions

8th Edition

ISBN:9781305079373

Author:William L. Masterton, Cecile N. Hurley

Publisher:William L. Masterton, Cecile N. Hurley

Chapter17: Electrochemistry

Section: Chapter Questions

Problem 74QAP: Consider the reaction low at 25°C: 3SO42(aq)+12H+(aq)+2Cr(s)3SO2(g)+2Cr3+(aq)+6H2O Use Table 17.1 to...

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Concept explainers

Potentiometric Titrations

Potentiometric titration is one of the important titration methods and is mainly carried out to characterize acid solutions. It follows a method similar to that of the normal titration technique, but the main difference is that there is no indicator used in the potentiometric titrations. Instead of using an indicator, electrodes are employed for monitoring the whole titration process. A scientist named Robert Behrend did the potentiometric titration for the first time, and it was done using the mercurous solution and potassium chloride.

Question

Calculate E^°_cell and indicate whether the overall reaction shown is spontaneous or nonspontaneous.

I₂(s) + 2e^- ----> 2I^-(aq) E° = 0.30 V

Cd³⁺(aq) + 3e^- -----> Cd(s) E° = -0.50 V

	E°_cell = 0.20 V, spontaneous
	E°_cell = 0.80 V, spontaneous
	E°_cell = - 0.20 V, nonspontaneous
	E°_cell = -0.80 V, nonspontaneous

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