Electrochemical Cell and Electrode Potential

The half-cells are connected by a ......................................., which is a tube containing a strong electrolyte, often potassium sulfate

• metallic wire

• salt bridge

• magnetic bridge

Which of the following is not a characteristic feature of a salt bridge?

• Salt bridge joins the two halves of an electrochemical cell

• It completes the inner circuit.

• It is filled with a salt solution (or gel).

• It does not maintain the electrical neutrality of the electrolytic solutions of the half-cells

What is an electrochemical cell?

• A device that produces electrical energy from chemical reactions
  

• A device that converts mechanical energy into electrical energy

• A device that produces chemical energy from electrical reaction

• A device that converts light energy into electrical energy

What is the unit of electrode potential in electrochemistry?

• Amps

• Joules

• Volts

• Coulombs

Which of the following is a standard half-cell potential under standard conditions?

• 0.1 V

• 1.0 V

• 0.5 V

• 0.0 V

Which metal is commonly used as the anode in a sacrificial anode system to prevent corrosion?

• Iron

• Zinc

• Copper

• Aluminum

Which of the following does not constitute the standard conditions for measuring standard electrode potential?

• Temperature of 0^oC

• Pressure of 1 Atm

• Concentration of 1 M

• Temperature of 25 ^oC

Ag+ + e --> Ag E⁰ = +0.80 V

Cr³⁺ +3e --> Cr E⁰ = -0.74V

Based on the standard reduction potential for silver and chromium, what is the cell potential for the following reaction?

3 Ag⁺ + Cr --> 3 Ag + Cr³⁺

• 0.06 V

• 1.54V

• 1.66V

• 3.14V

The reaction taking place at cathode is

• hydrolysis

• neutralization

• oxidation

• reduction

The lead-acid cell is an example of which of the following types of cells

• The dry cell

• The primary cell

• The voltaic cell

• The secondary cell