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11 Dec 2019

2 What is the emf of a cell consisting of a Pb2+/Pb half cell and a Pt/H+/H2 half cell if [Pb2+] = 0.10 M, [H+] = 0.050 M and pH2 = 1.0 bar?

3 Calculate the Cu2+/Zn2+ ratio at which the following reaction is spontaneous at 298.15K Cu(s) + Zn2+(aq) Cu2+(aq) + Zn(s)

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Write the overall reaction and the half-cell reactions of the following cells, and clearly indicate the anode and the cathode for each cell.

a) Zn|Zn2+(0.10 M)||Cu2+(0.10 M)|Cu

b) Fe|Fe2+(0.10 M)||Cu2+(0.10 M)|Cu

c) Pb|Pb2+(0.10 M)||Cu2+(0.10 M)|Cu

d) Pb|Pb2+(0.10 M)||Zn2+(0.10 M)|Zn

e) Zn|Zn2+(0.10 M)||Fe2+(0.10 M)|Fe

f) Pb|Pb2+(0.10 M)||Fe2+(0.10 M)|Fe

Consider the following table of standard reduction potentials.

Half-reaction	E ^o (V)
Cu²⁺(aq) + 2e^? ? Cu(s)	+0.34
Pb²⁺(aq) + 2e^? ? Pb(s)	-0.126
Cd²⁺(aq) + 2e^? ? Cd(s)	-0.403
Zn²⁺(aq) + 2e^? ? Zn(s)	-0.76

Based on these values, which of the following choices represents the correct combination of cell reaction and standard cell potential?

	Cu²⁺(aq) + Cd(s) ? Cu(s) + Cd²⁺(aq), +0.06 V
	Cu²⁺(aq) + Zn(s) ? Cu(s) + Zn²⁺(aq), ?0.42 V
	Pb²⁺(aq) + Cd(s) ? Pb(s) + Cd²⁺(aq), +0.53 V
	Pb²⁺(aq) + Zn(s) ? Pb(s) + Zn²⁺(aq), +0.63 V

what is the emf of a cell consisting of a pb2+/pb half-cell and a pt/h+/h2 half cell if [Pb2+]= 0.49 M, [H+] = 0.036 M and P_H2=1.0 atm?

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2 What is the emf of a cell consisting of a Pb2+/Pb half cell and a Pt/H+/H2 half cell if [Pb2+] = 0.10 M, [H+] = 0.050 M and pH2 = 1.0 bar?

3 Calculate the Cu2+/Zn2+ ratio at which the following reaction is spontaneous at 298.15K Cu(s) + Zn2+(aq) Cu2+(aq) + Zn(s)

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2 What is the emf of a cell consisting of a Pb2+/Pb half cell and a Pt/H+/H2 half cell if [Pb2+] = 0.10 M, [H+] = 0.050 M and pH2 = 1.0 bar? 3 Calculate the Cu2+/Zn2+ ratio at which the following reaction is spontaneous at 298.15K Cu(s) + Zn2+(aq) Cu2+(aq) + Zn(s)

Related textbook solutions

Basic Chemistry

Principles of Chemistry Molecular Approach

Principles of Chemistry Molecular Approach

Chemistry: Structure and Properties

Chemistry: A Molecular Approach

Chemistry: A Molecular Approach

Principles of Chemistry: A Molecular Approach

Chemistry: The Central Science

Related questions

Weekly leaderboard

2 What is the emf of a cell consisting of a Pb2+/Pb half cell and a Pt/H+/H2 half cell if [Pb2+] = 0.10 M, [H+] = 0.050 M and pH2 = 1.0 bar?

3 Calculate the Cu2+/Zn2+ ratio at which the following reaction is spontaneous at 298.15K Cu(s) + Zn2+(aq) Cu2+(aq) + Zn(s)