Analytical Chemistry Potential cell questions * Calculate the theoretical potent

Question

Analytical Chemistry Potential cell questions

* Calculate the theoretical potential of each of the following cells. Is the cell reaction spontaneous as written or

spontaneous in the opposite direction?

Bi/BiO+(0.0400M) , H+(0.200 M) , I- (0.100 M) , AgI(sat'd)/Ag

* Calculate the theoritical potential of the following cells. ( in each case assume that activities are approximately equal to molar concentration and that the temperature is 25 C.

SCE//Fe3+ (0.0250 M) , Fe2+ (0.0150M)/ Pt

* Calculate the standard potential for the reaction

CuBr(s) + e- -> Cu(s) + Br2

For CuBr , Ksp = 5.2 (multiply) 10-9

* The following cell was used for the determination of pCrO4-

SCE//CrO42- (xM) , Ag2CrO4 (sat'd)/Ag

Calculate pCrO4 if the cell potential is -0.386 V

* Calculate the electrode potentials of the following half cells

a) Fe3+ (6.72 (multiply) 10-4 M) , Fe2+ (0.100M) / Pt

b) IO3- (0.194 M) , I2 (2.00 (mutiply) 10-4 M) , H+ (3.50 (multiply) 10-3 M ) / Pt

* For each of the following half cells, compare the electrode potentials calculated from (1) concentration and (2) activity data.

Sn(ClO4)2 (3.00 (multiply) 10-5 M) , Sn(ClO4)4 (6.00 (multiply) 10-5 M) NaClO4 (0.0800M ) / Pt

Explanation / Answer

1)

- 0.357 and not spontaneous

2)

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