Reassessment Electrochemical Cells/Redox reactions

What reaction occurs at the anode?

• Ag⁺ + e^- →Ag
• Ag → Ag⁺ + e^-
• Ni²⁺ + 2e^- → Ni
• Ni → Ni²⁺ + 2e^-

The electrode at which reduction occurs

• cathode
• anode
• salt bridge
• electrode

Which statement is correct when the cell produces electricity?

• Magnesium atoms lose electrons
• Mass of the iron electrode decreases.
• Electrons flow from the iron half-cell to the magnesium half-cell.
• Negative ion flow from magnesium half-cell to iron half-cell

What is the function of Y in cell below?

• To complete the circuit
• To allow flow of electrons between both cells
• To allow flow of ions 
• To connect both half cells

Oxidation happens at the

• anode
• cathode
• salt bridge
• voltmeter

Which of the following reactions is balanced by both mass and charge?

• Fe⁺² + Al →Fe + Al⁺³
• Cu + Fe⁺² → Cu⁺¹ + Fe⁺³
• F₂ + Br^- --> F^- + Br₂
• Fe⁺² + 2 Cu --> 2 Cu⁺ + Fe

Electrolytic cell convert_energy to_energy

• electrical_

  chemical

• chemical_

  solar

• electrical_

  solar

• chemical_

  electrical

Answer explanation

electrolytic cell = electrical to chemical

galvanic cell = chemical to electrical

what is an electrolytic cell?

• a cell that produces electrical energy and chemical energy

• a cell that uses electrical energy to produce chemical energy

• a cell that uses up electrical energy and chemical energy

• a cell that uses chemical energy to produce electrical energy

Answer explanation

electrical energy from batteries

in the electrolysis of molten salts, molten NaCl is used as an electrolyte.

state the half equation of reaction that occurs at anode and cathode

• anode -

  Na+ + e- -> Na

  cathode -

  2Cl- -> Cl2 + 2e-

• anode -

  2Cl- -> Cl2 + 2e-

  cathode -

  2H20 + 2e- -> 4OH-

• anode -

  2Cl- -> Cl2 + 2e-

  cathode -

  Na+ + e- -> Na

• anode -

  2H20 + 2e- -> 4OH-

  cathode -

  Na+ + e- -> Na

Answer explanation

ions present = Na+, Cl-

which of the following statement about an electrolyte is correct?

• compound that conduct ion in molten state and aqueous solution

• compound that conduct electricity in molten state and aqueous solution

• compound that conduct ion in molten state

• compound that conduct electricity in molten state