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Calculate the value of Eocell for the following reaction: 2Co3+(aq) + 3Ca(s) --> 2Co(s) + 3Ca2+(aq)...

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Chemistry

Calculate the value of Eocell for the following reaction:2Co3+(aq) + 3Ca(s) --> 2Co(s) + 3Ca2+(aq) Co3+(aq) + 3e– -->Co(s) Eo = 1.54 V Ca2+(aq) + 2e– --> Ca(s) Eo = –2.87 V.

A. –1.33 V

B. +1.33 V

C. –4.41 V

D. –11.6 V

E. +4.41 V

Answer & Explanation Solved by verified expert
4.2 Ratings (712 Votes)

Since the reduction potential of Co3+ is more it is the cathodic reaction,so the

Standard potential of the cell , Eo = Eocathode - Eoanode

                                                  = EoCo3+/Co - EoCa2+/Ca

                                                  = +1.54 - (-2.87) V

                                                  = +1.33 V

Therefore the correct option is (B)
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