Electrochemical Cells

Charge of the anode

• Positive

• Negative

Charge of the cathode

• Positive

• Negative

Flow of electrons

• From cathode to anode

• From anode to cathode

Oxidation occurs at the

• anode

• cathode

Reduction occurs at the

• anode

• cathode

Which would be an accurate half-equation at the cathode for aluminum?

• Al³⁺ + 3e^- --> Al

• Al --> Al³⁺ + 3e^-

• Al³⁺ --> Al + 3e^-

• Al + 3e^- --> Al³⁺

Which would be an accurate half-equation at the anode for aluminum?

• Al³⁺ + 3e^- --> Al

• Al --> Al³⁺ + 3e^-

• Al³⁺ --> Al + 3e^-

• Al + 3e^- --> Al³⁺

What is an electrolyte?

• The liquid part of the electrochemical cell

• The metal part of the electrochemical cell

• The part that measures the voltage in an electrochemical cell

How do you complete the circuit when using 2 half-cells?

• acid bridge

• base bridge

• salt bridge

Different pairs of metals produce different voltages.

• True

• False