Item 18 A voltaic cell is constructed that is based on the following reaction: S

Question

Item 18

A voltaic cell is constructed that is based on the following reaction:
Sn2+(aq)+Pb(s)?Sn(s)+Pb2+(aq).

Part A

If the concentration of Sn2+ in the cathode compartment is 1.40M and the cell generates an emf of 0.22V , what is the concentration of Pb2+ in the anode compartment?

Express your answer using two significant figures.

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Part B

If the anode compartment contains [SO2?4]= 1.40M in equilibrium with PbSO4(s), what is the Ksp of PbSO4?

Express your answer using two significant figures.

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Item 18

A voltaic cell is constructed that is based on the following reaction:
Sn2+(aq)+Pb(s)?Sn(s)+Pb2+(aq).

Part A

If the concentration of Sn2+ in the cathode compartment is 1.40M and the cell generates an emf of 0.22V , what is the concentration of Pb2+ in the anode compartment?

Express your answer using two significant figures.

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Incorrect; Try Again; 28 attempts remaining

Part B

If the anode compartment contains [SO2?4]= 1.40M in equilibrium with PbSO4(s), what is the Ksp of PbSO4?

Express your answer using two significant figures.

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Incorrect; Try Again; 27 attempts remaining

Explanation / Answer

0.22 = -0.13 - ( - 0.14 ) + (RT/2F) ln (1.40/x)

x = 1.10*10^-7

Ksp = [Pb2+][SO42-]= [1.10*10^-7] *[1.40] =1.54*10^-7

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