Electrochemical Cells

Reduction happens at the 

• anode
• cathode
• salt bridge
• voltmeter

Oxidation happens at the

• anode
• cathode
• salt bridge
• voltmeter

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-PS1-2

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

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

Tags

NGSS.HS-PS1-2

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

• A
• B
• C
• D

Tags

NGSS.HS-PS3-5

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

Tags

NGSS.HS-PS1-2

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

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

This electrode in a voltaic cell gains mass

• anode
• cathode

Reactions in voltaic cells are

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