In the context of balancing redox equations, what does it mean to "balance the charge"?

Ensuring that the same number of electrons is produced and consumed

Making sure the total number of atoms is the same on both sides of the equation

Adjusting the pH of the solution

Adding water molecules to balance the hydrogen atoms

How can the voltage of a galvanic cell be increased?

By decreasing the concentration of the electrolyte

By reversing the direction of electron flow

Which statement best describes the energy conversion in a fuel cell?

Chemical energy to electrical energy

Mechanical energy to electrical energy

Electrical energy to chemical energy

Thermal energy to electrical energy

What is the function of the salt bridge in an electrochemical cell?

To increase the cell's electrical resistance.

To provide a path for electrons to move between the electrodes.

To prevent the electrodes from physically touching each other.

What role does the electrolyte play in a fuel cell?

It provides a medium for ion exchange.

It acts as a barrier to electron flow.

It increases the electrical resistance of the cell.

It stores electrical energy for later use.

Which of the following is a characteristic feature of a redox reaction?

It involves the transfer of electrons between reactants.

It involves the exchange of protons between reactants.

It only occurs in basic solutions.

It results in the formation of a precipitate.

What is the role of inert electrodes in a galvanic cell?

To provide a surface for the redox reaction without undergoing any chemical change themselves.

To participate actively in the chemical reaction and get consumed.

To increase the electrical resistance of the cell.

To act as a source of ions in the electrolyte solution.

How does the electrochemical series help in designing galvanic cells?

By predicting the spontaneity of redox reactions and determining the direction of electron flow.

By providing the color of the electrodes for aesthetic design.

By indicating the solubility of electrolytes in water.

By determining the size of the cell components.

What determines the maximum cell voltage under standard conditions in a galvanic cell?

The difference in standard electrode potentials of the two half-cells.

The difference in concentration of the electrolyte solutions.

The physical size of the electrodes.

The temperature of the electrolyte solutions.

Why are porous electrodes important in fuel cells?

To increase the surface area for reaction, thereby enhancing efficiency

To decrease the overall weight of the cell

To make the cell look aesthetically pleasing

To reduce the cost of fuel cell production

What is the primary function of the electrolyte in a fuel cell?

To facilitate the flow of ions between the anode and cathode

To cool down the cell components

How does increasing the efficiency of a fuel cell impact its operation?

Enhances the conversion of chemical energy to electrical energy

Increases the amount of fuel required

Decreases the electrical output

Reduces the environmental benefits

How is the standard electrode potential of a half-cell measured?

By comparing it to the potential of a standard hydrogen electrode under standard conditions

By measuring the amount of gas produced in the reaction

By calculating the difference in mass of the electrode before and after the reaction

By observing the color change of the solution

What effect does temperature have on the voltage of a galvanic cell?

Increasing the temperature increases the voltage of the cell

Temperature has no effect on the voltage of a galvanic cell

Decreasing the temperature increases the voltage of the cell

Increasing the temperature decreases the voltage of the cell

Which of the following statements is true regarding the calculation of cell potential using the electrochemical series?

The cell potential is the difference between the more positive electrode potential and the more negative electrode potential

The cell potential is the sum of the potentials of the two half-cells

The cell potential can only be calculated when both half-cells have positive electrode potentials

The cell potential is independent of the electrode potentials and depends only on the concentration of the solutions

Reactions in Cells

Authored by Charles Martinez

Chemistry

12th Grade

NGSS covered

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is a redox reaction?

A reaction involving only reduction

A reaction involving the transfer of electrons between two species

A reaction where oxygen is added to a compound

A reaction that can only occur in acidic solutions

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Oxidation

Reduction

Precipitation

Neutralization

Which of the following is the correct half-reaction for the oxidation process in a redox reaction?

What is the purpose of the salt bridge in a galvanic cell?

To increase the voltage of the cell

To allow the flow of electrons between the two half-cells

To prevent the mixing of the solutions in the two half-cells

To maintain electrical neutrality by allowing the flow of ions

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following equations correctly represents a fuel cell operation?

How do fuel cells differ from galvanic cells?

Fuel cells require a continuous supply of reactants

Galvanic cells convert chemical energy into electrical energy more efficiently

Fuel cells do not involve redox reactions

Galvanic cells require an external circuit to operate

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the anode in a galvanic cell?

The electrode where oxidation occurs

The electrode where reduction occurs

The electrode that attracts cations

The electrode that attracts anions

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Reactions in Cells

What is a redox reaction?

Which of the following is the correct half-reaction for the oxidation process in a redox reaction?

What is the purpose of the salt bridge in a galvanic cell?

Which of the following equations correctly represents a fuel cell operation?

How do fuel cells differ from galvanic cells?

What is the anode in a galvanic cell?

In the context of balancing redox equations, what does it mean to "balance the charge"?

Which component is not part of a basic fuel cell?

What is the main chemical reaction occurring in a hydrogen-oxygen fuel cell?

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