The calculation for E cell is wrong in part a and b. Map Sapling Learning 100 Fo

Question

The calculation for E cell is wrong in part a and b.

Map Sapling Learning 100 For the following electrochemical cells, calculate the potential and determine if the cell reaction is spontaneous as written at 25°C 100 A) Cu(s) I Cu2 (0.12 M) 11 Fe2 (0.0025 M) I Fe(s) 95 95 Cu2+/Cu=0.339 V Fe2+ / Fe =-0.440 V Number Spontaneous O Not Spontaneous Ecdl801 B) Pt(s) I Sn2 (0.0011 M), Sn4*(0.15 M) I1 Fe? (0.0046 M), Fe (0.14 M) I Pt(s) 0.154 V E SnSn 100 100 100 Number 5 16 1 17 E.660 spontaneous Not Spontaneous There is a hint available View the hint by clicking on the Click on the divider bar again to hide the hint. 18 2 95 O Previous Give Up & View Solution O Check Answer Next El Exit 19 2

Explanation / Answer

A) Since, Ecell = Ecathode - Eanode

= ( - 0.440 - 0.339 ) V

= - 0.779 V

B) Similarly, Ecell = Ecathode - Eanode

  = (0.771 - 0.154) V

  = 0.617 V

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