Electrochemical Cells
Chemistry ⇒ Redox Reactions and Electrochemistry
Electrochemical Cells starts at 11 and continues till grade 12.
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A cell is constructed with the following half-cells: Fe2+/Fe (E° = -0.44 V) and Ag+/Ag (E° = +0.80 V). Which metal will be deposited at the cathode?
Describe the construction and working of a Daniell cell.
Describe the function of the salt bridge in a galvanic cell.
Describe the role of inert electrodes in electrochemical cells.
A cell is constructed with the following half-cells: Fe2+/Fe (E° = -0.44 V) and Ag+/Ag (E° = +0.80 V). Which metal will be deposited at the cathode?
Calculate the cell potential at 25°C for the cell: Zn(s) | Zn2+(1.0 M) || Cu2+(0.01 M) | Cu(s). E°cell = 1.10 V. (Use the Nernst equation: Ecell = E°cell - (0.059/2) log([Cu2+]/[Zn2+]))
Calculate the standard cell potential for a cell with the following half-reactions: Zn2+ + 2e- → Zn(s) E° = -0.76 V; Cu2+ + 2e- → Cu(s) E° = +0.34 V.
Calculate ΔG° for a cell reaction where n = 2, E°cell = 1.10 V, and F = 96500 C/mol.
In a cell, if the concentration of ions in the cathode compartment is increased, what happens to the cell potential? (1) Increases (2) Decreases (3) Remains the same (4) Becomes zero
In a Daniell cell, which metal acts as the anode? (1) Zinc (2) Copper (3) Silver (4) Iron
The standard electrode potential of a cell is measured under which conditions? (1) 1 M concentration, 1 atm pressure, 25°C (2) 0.1 M concentration, 1 atm pressure, 0°C (3) 1 M concentration, 2 atm pressure, 25°C (4) 1 M concentration, 1 atm pressure, 100°C
Which of the following is a primary cell? (1) Lead-acid battery (2) Nickel-cadmium cell (3) Dry cell (4) Fuel cell
Fill in the blank: In a galvanic cell, the _______ is negative and the _______ is positive.
Fill in the blank: The _______ equation relates the cell potential to the concentrations of the reactants and products.
Fill in the blank: The _______ is the device used to measure the potential difference between two electrodes in a cell.
Fill in the blank: The _______ is the electrode where oxidation occurs in both galvanic and electrolytic cells.
True or False: In a galvanic cell, the anode is always the site of oxidation.
True or False: In a galvanic cell, the flow of electrons is from the cathode to the anode.
True or False: The cell potential becomes zero when the cell reaches equilibrium.
True or False: The cell potential depends on the nature of the electrodes and the concentration of the electrolytes.
