Voltaic Cell Basics BC

A voltaic cell is producing the redox reaction below.

Mg(s) + Fe²⁺(aq) → Mg²⁺(aq) + Fe(s)

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.

Metal A is more reactive than metal B. Which statement is correct?

• Electrons flow in the external circuit from A to B

• Negative ions flow through salt bridge from A to B

• Positive ions flow in external circuit from B to A.

• Electrons flow through salt bridge from B to A

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

Below shows a cell diagram for voltaic cell. Which of the following is FALSE?

• electrons flow from anode to cathode

• oxidation happens in anode

• copper undergoes reduction to form copper ions

• zinc undergoes oxidation to form zinc ions

In an operating cell, reduction occurs at the

• anode

• cathode

• salt bridge

• voltmeter

Reactions in voltaic cells are

• spontaneous, redox reactions
• non-spontaneous, redox reactions
• spontaneous, non-redox reactions
• non-spontaneous, non-redox reactions

This electrode loses mass 

• anode
• cathode

In which direction does electricity (electrons) flow in a voltaic cell?

• electrons flow from the cathode to the anode

• electrons flow from left to right

• electrons flow from anode to cathode

• electrons flow from right to left

What reaction occurs at the anode?

• Ag⁺(aq) + e^- → Ag(s)

• Ag(s) → Ag⁺(aq) + e^-

• Ni²⁺(aq) + 2e^- → Ni(s)

• Ni(s) → Ni²⁺(aq) + 2e^-

• a

• b

• c

• d