Question

CHEMISTRY 1220L ELECTROCHEMISTRY 2. Complete the following table for the indicated half-cell combinations at standard conditions: Couples | Which metal is the anode? | Which metal is the cathode? | Toward which metal do the electrons flow? | What would the potential be under standard conditions? --- | --- | --- | --- | --- Cu/Cu2+, Ag/Ag+ | | | | Zn/Zn2+, Pb/Pb2+ | | | | Pb/Pb2+, Mg/Mg2+ | | | | Mg/Mg2+, Ag/Ag+ | | | | 3. Compare the potentials you measured between the Ag/Ag+ and Cu/Cu2+ half-cells before and after adding excess NH3(aq) to the Cu/Cu2+ half-cell. Did the potential increase or decrease? Explain the result in terms of the Nernst equation. 4. Compare the potentials you measured between the Zn/Zn2+ and Cu/Cu2+ half-cells before and after adding excess NH3(aq) to the Cu/Cu2+ half-cell. Did the potential increase or decrease? Explain the result in terms of the Nernst equation.

          CHEMISTRY 1220L
ELECTROCHEMISTRY
2. Complete the following table for the indicated half-cell combinations at standard conditions:

Couples | Which metal is the anode? | Which metal is the cathode? | Toward which metal do the electrons flow? | What would the potential be under standard conditions?
--- | --- | --- | --- | ---
Cu/Cu2+, Ag/Ag+ | | | | 
Zn/Zn2+, Pb/Pb2+ | | | | 
Pb/Pb2+, Mg/Mg2+ | | | | 
Mg/Mg2+, Ag/Ag+ | | | | 

3. Compare the potentials you measured between the Ag/Ag+ and Cu/Cu2+ half-cells before and after adding excess NH3(aq) to the Cu/Cu2+ half-cell. Did the potential increase or decrease? Explain the result in terms of the Nernst equation.

4. Compare the potentials you measured between the Zn/Zn2+ and Cu/Cu2+ half-cells before and after adding excess NH3(aq) to the Cu/Cu2+ half-cell. Did the potential increase or decrease? Explain the result in terms of the Nernst equation.

CHEMISTRY 1220L
ELECTROCHEMISTRY
2. Complete the following table for the indicated half-cell combinations at standard conditions:

Couples | Which metal is the anode? | Which metal is the cathode? | Toward which metal do the electrons flow? | What would the potential be under standard conditions?
— | — | — | — | —
Cu/Cu2+, Ag/Ag+ | | | |
Zn/Zn2+, Pb/Pb2+ | | | |
Pb/Pb2+, Mg/Mg2+ | | | |
Mg/Mg2+, Ag/Ag+ | | | |

3. Compare the potentials you measured between the Ag/Ag+ and Cu/Cu2+ half-cells before and after adding excess NH3(aq) to the Cu/Cu2+ half-cell. Did the potential increase or decrease? Explain the result in terms of the Nernst equation.

4. Compare the potentials you measured between the Zn/Zn2+ and Cu/Cu2+ half-cells before and after adding excess NH3(aq) to the Cu/Cu2+ half-cell. Did the potential increase or decrease? Explain the result in terms of the Nernst equation.

Added by Carlos L.

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