11-04: Electrolytic Cells

When comparing voltaic cells to electrolytic cells, oxidation occurs at the

• anode in both types of cells

• cathode in both types of cells

• anode in voltaic cells, only

• cathode in voltaic cells, only

Which device requires electrical energy to produce a chemical change?

• electrolytic cell

• salt bridge

• voltaic cell

• voltmeter

An electrolytic cell differs from a voltaic cell because an electrolytic cell

• generates its own energy from a spontaneous physical reaction

• generates its own energy from a nonspontaneous physical reaction

• requires an outside energy source for a spontaneous chemical reaction to occur

• requires an outside energy source for a nonspontaneous chemical reaction to occur

Where do reduction and oxidation occur in an electrolytic cell?

• Both occur at the anode.

• Both occur at the cathode.

• Reduction occurs at the anode, and oxidation occurs at the cathode.

• Reduction occurs at the cathode, and oxidation occurs at the anode.

At which electrode does oxidation occur in a voltaic cell and in an electrolytic cell?

• the anode in a voltaic cell and the cathode in an electrolytic cell

• the cathode in a voltaic cell and the anode in an electrolytic cell

• the anode in both a voltaic cell and an electrolytic cell

• the cathode in both a voltaic cell and an electrolytic cell

What type of electrochemical cell is shown?

• oxidation cell

• electrolytic cell

• reduction cell

• voltaic cell

Tags

NGSS.HS-PS2-5

Write the balanced half-reaction for the reduction that occurs in this electrolytic cell.

• Cl₂ + 2e⁻ → 2Cl⁻

• Cl₂ → 2Cl⁻ + 2e⁻

• 2Na⁺ + 2e⁻ → 2Na

• 2Na⁺ → 2Na + 2e⁻

Tags

NGSS.HS-PS2-5

The diagram shows a key being plated with copper in an electrolytic cell. Given the reduction reaction for this cell:

Cu²⁺(aq) + 2e⁻ → Cu(s)

this reduction occurs at

• A, which is the anode

• A, which is the cathode

• B, which is the anode

• B, which is the cathode

Tags

NGSS.HS-PS1-2

Which energy transformation occurs when an electrolytic cell is in operation?

• chemical energy → electrical energy

• electrical energy → chemical energy

• light energy → heat energy

• light energy → chemical energy

Which atom forms an ion that would migrate toward the cathode in an electrolytic cell?

• F

• I

• Na

• Cl

Tags

NGSS.HS-PS2-5