AP Chem Voltaic Cells Practice

Which species is oxidized in the following reaction?

2 Ag⁺(aq) + Cu(s) ⟶ 2 Ag(s) + Cu²⁺(aq)

• Ag

• Ag⁺

• Cu

• Cu²⁺

What is the role of the salt bridge in a voltaic cell? (Check all that apply)

• To allow the movement of water molecules between the two half cells

• To allow the movement of electrons between the half cells

• To allow the movement of ions to maintain charge neutrality

Tags

NGSS.HS-PS2-5

What happens to the cell voltage when the salt bridge is removed>

• The cell voltage drops to zero.

• The cell voltage increases.

• The cell voltage becomes negative.

• The cell voltage is unchanged.

Tags

NGSS.HS-PS3-1

Reduction happens at the ____.

• anode

• cathode

• salt bridge

• voltmeter

Oxidation happens 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 in a voltaic cell becomes more massive as the cell operates.

• anode

• cathode

This electrode becomes less massive as the cell operates.

• anode

• cathode

Tags

NGSS.HS-PS1-7

Which of the following statements correctly describes the movement of electrons in a voltaic cell.

• Electrons flow through the salt bridge from the cathode to the anode

• Electrons flow from left to right as the cell operates.

• Electrons flow through the external wire from the anode to cathode

• Electrons flow from right to left as the cell operates.

Reduction happens at the (anode or cathode)