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@fatimai7 • 1 day ago • Chemistry

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Popular Chemistry Practice Problems

Exercise 41. Sketch the galvanic cells based on the following half-reactions. Show the direction of electron flow, show the direction of ion migration through the salt bridge, and identify the cathode and anode. Give the overall balanced equation, and determine ε° for the galvanic cells. Assume that all concentrations are 1.0 M and that all partial pressures are 1.0 atm.

b. MnO4 - + 8H + 5e-  → Mn 2+ + 4H2O      ε° = 1.51 V 

    IO4 - + 2H + + 2e- → IO3 - + H2O              ε° = 1.60 V

Calculate ΔG° and K at 25°C for the reaction above.

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Exercise 41. Sketch the galvanic cells based on the following half-reactions. Show the direction of electron flow, show the direction of ion migration through the salt bridge, and identify the cathode and anode. Give the overall balanced equation, and determine ε° for the galvanic cells. Assume that all concentrations are 1.0 M and that all partial pressures are 1.0 atm.

a. Cl2 + 2e- → 2Cl -        ε° = 1.36 V 

    Br2 + 2e- → 2Br -       ε° = 1.09 V

Calculate ΔG° and K at 25°C for the reaction above.

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Exercise 37. Sketch the galvanic cells based on the following overall reactions. Show the direction of electron flow, and identify the cathode and anode. Give the overall balanced equation. Assume that all concentrations are 1.0 M and that all partial pressures are 1.0 atm.

b. Cu 2+(aq) + Mg(s) ⇌ Mg 2+(aq) + Cu(s)

Calculate ΔG° and K at 25°C for the reaction above.

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Exercise 42. Sketch the galvanic cells based on the following half-reactions. Show the direction of electron flow, show the direction of ion migration through the salt bridge, and identify the cathode and anode. Give the overall balanced equation, and determine ε° for the galvanic cells. Assume that all concentrations are 1.0 M and that all partial pressures are 1.0 atm.

b. Mn 2+ + 2e- → Mn                   ε° = —1.18 V
    Fe 3+ + 3e- → Fe                     ε ° = —0.036 V

Calculate ΔG° and K at 25°C for the reaction above.

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76

Exercise 38. Sketch the galvanic cells based on the following overall reactions. Show the direction of electron flow, the direction of ion migration through the salt bridge, and identify the cathode and anode. Give the overall balanced equation. Assume that all concentrations are 1.0 M and that all partial pressures are 1.0 atm.

b. Zn(s) + Ag +(aq) ⇌ Zn 2+(aq) + Ag(s)

Calculate ΔG° and K at 25°C for the reaction above.

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