Electrochemistry Basics

What is an electrochemical cell?

• An electrochemical cell is a device that converts heat energy into electrical energy.

• An electrochemical cell is a device that converts mechanical energy into electrical energy.

• An electrochemical cell is a device that converts light energy into electrical energy.

• An electrochemical cell is a device that converts chemical energy into electrical energy through redox reactions.

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Explain the working principle of a galvanic cell.

• A galvanic cell operates by utilizing redox reactions to produce an electric current as electrons flow from the anode to the cathode through an external circuit.

• A galvanic cell operates by utilizing sound waves to produce an electric current.

• A galvanic cell operates by utilizing gravitational force to produce an electric current.

• A galvanic cell operates by utilizing heat energy to produce an electric current.

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Describe the components of an electrolytic cell.

• Electrodes, electrolyte solution, external power source, wires

• Electrodes, salt, power outlet, plastic tubing

• Cathode, anode, water, light bulb

• Cathode, anode, salt bridge, voltmeter

What is the purpose of a salt bridge in an electrochemical cell?

• To maintain electrical neutrality in the two half-cells of an electrochemical cell.

• To increase the voltage output of the cell

• To prevent the flow of electrons between the two half-cells

• To regulate the temperature of the cell

What is the main difference between a galvanic cell and an electrolytic cell?

• Galvanic cell requires an external electrical energy source, while an electrolytic cell converts chemical energy into electrical energy spontaneously.

• Galvanic cell converts chemical energy into electrical energy spontaneously, while an electrolytic cell requires an external electrical energy source.

• Galvanic cell and electrolytic cell both require an external electrical energy source.

• Galvanic cell and electrolytic cell both convert chemical energy into electrical energy spontaneously.

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How does a galvanic cell generate electricity?

• The galvanic cell generates electricity by emitting light

• Redox reactions at the anode and cathode release and accept electrons, respectively, generating an electric current.

• The galvanic cell generates electricity through mechanical rotation

• The galvanic cell absorbs electricity from the environment

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In an electrolytic cell, which electrode is connected to the positive terminal of the battery?

• positive electrode

• anode

• cathode

• negative electrode

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What is the role of the electrolyte in an electrochemical cell?

• Stores electrical charge

• Generates heat in the cell

• Prevents the flow of electrons

• Facilitates the flow of ions between electrodes

What happens at the anode and cathode in a galvanic cell?

• No reaction at either the anode or cathode

• Oxidation at both the anode and cathode

• Oxidation at the anode and reduction at the cathode

• Reduction at the anode and oxidation at the cathode

How does the flow of electrons occur in an electrochemical cell?

• Electrons flow from the cathode to the anode through the electrolyte.

• Electrons flow from the anode to the cathode through the electrolyte.

• Electrons flow from the cathode to the anode through an external circuit.

• Electrons flow from the anode to the cathode through an external circuit.