ChemH: Voltaic Cells & Electrical Potential

Which direction do the electrons flow in wire X and which metal is oxidized?

• A
• B
• C
• D

Reduction happens at the 

• anode
• cathode
• salt bridge
• voltmeter

Oxidation happens at the

• anode
• cathode
• salt bridge
• voltmeter

In a voltaic cell, the half cell that receives anions from the salt bridge is

• cathode
• anode

In a voltaic cell, the half cell that receives cations from the salt bridge is

• cathode
• anode

Which species is oxidized in the following reaction?

• Ag

• Ag⁺

• Cu

• Cu²⁺

Tags

NGSS.HS-PS1-2

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

• Electrons flow in the external circuit from A to B
• Positive 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

Tags

NGSS.HS-PS2-5

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 undergo reduction to form copper ions
• Zinc undergo oxidation to form Zinc ions

Tags

NGSS.HS-PS2-5

What reaction occurs at the anode?

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

Tags

NGSS.HS-PS2-5

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