Mastering Redox and Electrolysis Concepts

Which of the following is the correctly balanced chemical equation for the reaction between hydrogen gas and oxygen gas to form water?

Tags

NGSS.HS-PS1-7

NGSS.HS-PS1-2

In a redox reaction, which species is reduced?

• The species that gains electrons

• The species that loses electrons

• The species that gains protons

• The species that loses protons

• +2

• +4

• +6

• -2

Tags

NGSS.HS-PS1-2

During the electrolysis of water, what gas is produced at the anode?

• Hydrogen

• Oxygen

• Nitrogen

• Chlorine

In the electrolysis of salt (NaCl), what is the primary product formed at the cathode?

• Sodium metal

• Chlorine gas

• Hydrogen gas

• Oxygen gas

Which of the following correctly describes the role of the cathode in an electrolysis cell?

• It is the site of oxidation

• It is the site of reduction

• It is positively charged

• It is where electrons are removed

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

• To allow the flow of electrons between electrodes

• To maintain electrical neutrality by allowing the flow of ions

• To separate the anode and cathode physically

• To increase the voltage of the cell

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

• Only oxidation occurs

• Only reduction occurs

• Both oxidation and reduction occur simultaneously

• Neither oxidation nor reduction occurs

In an electrolysis lab setup, which component is responsible for providing the electrical energy needed for the reaction?

• Electrolyte

• Power supply

• Salt bridge

• Electrode

Tags

NGSS.HS-PS2-5