Expert Chemistry Tutoring

Q1 (1 mark) Define electrolysis.

Q2 (2 marks) State the products of electrolyzing copper(II) sulfate solution using copper electrodes.

Q3 (3 marks) Explain how electrolysis can be used to extract aluminum from its ore.

Q4 (4 marks) Calculate the number of moles of sodium ions produced when 0.50 moles of sodium chloride are electrolyzed.

Q5 (2 marks) Describe the changes that occur at the electrodes during the electrolysis of molten lead bromide.

Q6 (3 marks) Explain why the reactivity of the products of electrolysis of water depends on the pH of the solution.

Q7 (4 marks) Construct a balanced chemical equation for the electrolysis of potassium chloride solution.

Q8 (2 marks) State the difference between electroplating and electrorefining.

Q9 (3 marks) Explain how the rate of electrolysis is affected by the use of a platinum electrode compared to a carbon electrode.

Q10 (4 marks) Calculate the mass of aluminum produced by passing 5.0 A of current through molten aluminum oxide for 2.0 hours. (Assume Faraday's constant is 96,500 C/mol)