Electrochemical Cells

Which of the following processes occurs at the anode of an electrolytic cell?

• Reduction

• Oxidation

• Ionization

• Precipitation

Which of the following is NOT a characteristic of galvanic cells?

• They generate electrical energy.

• They are spontaneous.

• They require an external power source.

• They involve redox reactions.

Which energy conversion shown below takes place in a voltaic cell?

• Electrical to chemical

• Mechanical to chemical

• Mechanical to electrical

• Chemical to electrical

Tags

NGSS.HS-PS3-2

NGSS.HS-PS3-3

Reactions in voltaic cells are

• spontaneous, redox reactions

• non-spontaneous, redox reactions

• spontaneous, non-redox reactions

• non-spontaneous, non-redox reactions

Which of the following is not a similarity between voltaic and electrolytic cells?

• electrons flow from anode to cathode

• reduction occurs at cathode

• oxidation occurs at anode

• charges on anode and cathode are the same

Applications of electrochemical cells include...

• Rechargeable batteries in phones and laptops

• Hydrogen fuel cells in electric cars

• Energy storage systems in the Whitelee Windfarm

• Single-use batteries in TV remotes

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NGSS.HS-PS3-3

NGSS.HS-PS3-5

The following cell has an EMF of +0.46 V.

Cu | Cu²⁺ || Ag⁺ | Ag

Which statement is correct about the operation of the cell?

• Metallic copper is oxidised by Ag⁺ ions.

• The silver electrode has a negative polarity.

• The silver electrode gradually dissolves to form Ag⁺ ions.

• Electrons flow from the silver electrode to the copper electrode via an external circuit.

Tags

NGSS.HS-PS2-5

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

• A

• B

• C

• D

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

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