In a galvanic cell, one half cell consists of a tin strip dipped into a 1.00 M s

Question

In a galvanic cell, one half cell consists of a tin strip dipped into a 1.00 M solution of Sa(NO,)h. In the second half-cell, solid thallium is in contact with a 1.00 M solution of TINO, Sn is observed to plate out as the galvanic cell operates, and the initial cell voltage is measured to be 0.196 V at 25°C (a) Write balanced equations for the half-reactions at the anode and the cathode. Show electrons as e. Use the smallest integer coefficients possible and the pull-down boxes to indicate states. If a box is not needed, leave it blank Half-reaction at anode (do not multiply by factor): Half-reaction at cathode (do not multiply by factor) (b) Calculate the standard reduction potential of a TI TI half-cell. The standard reduction potential of the Sa?" Sa electrode is -0.140 V

Explanation / Answer

Oxidation Half Reaction :
Tl (s) ---------> Tl+ (aq.) + e-

Reduction Half Reaction :

Sn2+ (aq.) + 2 e- ---------> Sn (s)

E0cell = E0Sn2+/Sn - E0Tl+/Tl

0.196 = - 0.140 - E0Tl+/Tl

E0Tl+/Tl = - 0.336 V

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