Electrolysis of Brine

Suppose you are given brine to separate by electrolysis. What will you predict as the likely products?

• Hydrogen and chlorine

• Oxygen and hydrogen

• Sodium and chlorine

• Sodium hydroxide and oxygen

Suppose you are given brine to separate by electrolysis. Which of the following diagrams correctly shows the electrolysis setup?

• Diagram A

• Diagram B

• Diagram C

• Diagram D

Suppose you are given brine to separate by electrolysis. What is the half equation for the reaction at the cathode?

• 2H2O + 2e- → H2 + 2OH-

• Cl2 + 2e- → 2Cl-

• Na+ + e- → Na

• O2 + 4e- → 2O2-

Suppose you are given brine to separate by electrolysis. What is the half equation for the reaction at the anode?

• 2Cl⁻ → Cl₂ + 2e⁻

• 2H₂O + 2e⁻ → H₂ + 2OH⁻

• Na⁺ + e⁻ → Na

• O₂ + 4H⁺ + 4e⁻ → 2H₂O

Suppose you are given brine to separate by electrolysis. What is the overall balanced equation?

• 2NaCl + 2H2O → Cl2 + H2 + 2NaOH

• NaCl + H2O → NaOH + Cl2 + H2

• 2NaCl + H2O → NaOH + Cl2 + H2

• NaCl + 2H2O → Cl2 + H2 + NaOH