Understanding Galvanic Cells

What is the primary function of a galvanic or voltaic cell?

• To convert chemical energy into electrical energy

• To create a magnetic field

• To convert electrical energy into chemical energy

• To store chemical energy

In a redox reaction, what does the mnemonic 'LEO the lion says GER' help us remember?

• Loss of energy is reduction, gain of energy is oxidation

• Loss of energy is oxidation, gain of energy is reduction

• Loss of electrons is oxidation, gain of electrons is reduction

• Loss of electrons is reduction, gain of electrons is oxidation

How can we harness electrical energy from a redox reaction?

• By allowing the reaction to occur in a single container

• By separating the reaction into two half-reactions and forcing electrons to travel over a wire

• By mixing all reactants in a closed system

• By using a magnetic field to direct electron flow

What is the role of the anode in a galvanic cell?

• It is positively charged

• It is the site of oxidation

• It attracts electrons

• It is the site of reduction

What happens to the zinc electrode as the galvanic cell operates?

• It becomes positively charged

• It gains mass

• It loses mass

• It remains unchanged

What is the charge of the cathode in a galvanic cell?

• Neutral

• Variable

• Positive

• Negative

What happens to the copper electrode as the galvanic cell operates?

• It remains unchanged

• It loses mass

• It becomes negatively charged

• It gains mass

Why is a salt bridge important in a galvanic cell?

• It increases the voltage of the cell

• It separates the anode and cathode

• It maintains electrical neutrality by allowing ions to move between solutions

• It provides a path for electrons to flow

What is a cell diagram used for?

• To measure the current in a galvanic cell

• To provide a written representation of the reactions occurring in a galvanic cell

• To visually represent the physical setup of a galvanic cell

• To calculate the voltage of a galvanic cell

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

• Galvanic cells require an external power source

• Electrolytic cells convert chemical energy into electrical energy

• Galvanic cells involve spontaneous reactions, while electrolytic cells involve non-spontaneous reactions

• Electrolytic cells do not involve redox reactions