Reactions in Cells

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

• Oxidation

• Reduction

• Precipitation

• Neutralization

Tags

NGSS.HS-PS1-2

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

Tags

NGSS.HS-PS1-7

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

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

Tags

NGSS.HS-PS1-4

NGSS.HS-PS1-7

NGSS.HS-PS3-1

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

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

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

Which component is not part of a basic fuel cell?

• Anode

• Cathode

• Salt bridge

• Electrolyte

Tags

NGSS.HS-PS3-3

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

Tags

NGSS.HS-PS1-4

NGSS.HS-PS1-7