Regents Prep Electrochem

Which statement is true about oxidation and reduction in an electrochemical cell? (56)

• A) Both occur at the anode.

• B) Both occur at the cathode.

• C) Oxidation occurs at the anode and reduction occurs at the cathode.

• D) Oxidation occurs at the cathode and reduction occurs at the anode.

49. As an electrochemical cell approaches equilibrium, the electrical energy supplied by the cell

• A) decreases

• B) increases

• C) remains the same

• A) reduction of Cu2+ (aq)

• B) reduction of Cu(s)

• C) oxidation of Cr

• D) oxidation of Cr(s)

• A) Mg(s)

• B) Mg2+ (aq)

• C) Ag(s)

• D) Ag+ (aq)

46. In a chemical cell composed of two half-cells, ions are allowed to flow from one half-cell to another by means of

• A) electrodes

• B) a voltmeter

• C) an external conductor

• D) a salt bridge

47. The reaction that takes place in a chemical cell is best classified as

• A) fusion

• B) redox

• C) transmutation

• D) cracking

48. In a chemical cell, electrical energy will be produced when

• A) only oxidation occurs

• B) only reduction occurs

• C) both oxidation and reduction occur

• D) neither oxidation nor reduction occurs

What is reduction?

• It is the gain of electrons.

• It is the loss of electrons.

• It is the creation of electrons.

• It is the destruction of electrons.

What is oxidation?

• It is the gain of electrons.

• It is the loss of electrons.

• It is the creation of electrons.

• It is the destruction of electrons.

What is a galvanic (voltaic) cell?

• It is a cell that destroys electrons on one side and creates electrons on the other side.

• It is a cell that contains only one metal bar and one aqueous ion solution.

• It is a type of battery that drives a redox reaction when electricity is applied.

• It is a type of battery that generates an electrical current from redox reactions.