Question 1: Oxygen evolution in industry often involves the electrolysis of water, where electricity is used to split water molecules into oxygen and hydrogen gases. This process is vital for producing pure oxygen for medical, industrial, and environmental applications.

Answer: Electrolysis of water

Question 1: Define electrolysis and explain how it leads to oxygen production.

Answer: Electrolysis is a process that uses electricity to split compounds into their elements; in water, it splits into oxygen and hydrogen gases.

Question 2: Describe the role of electrodes in the electrolysis of water for oxygen evolution.

Answer: Electrodes conduct electricity; the anode attracts oxygen ions where oxygen gas is produced.

Question 1: If 2 liters of water are electrolyzed at standard conditions, how much oxygen gas (in liters) is produced? (Assume 100% efficiency and that water splits into equal volumes of hydrogen and oxygen gases).

Answer: 1 liter of oxygen

Question 2: Calculate the amount of electricity (in Coulombs) needed to produce 10 grams of oxygen gas. (Molar mass of O2 = 32 g/mol, 1 mol of O2 at STP occupies 22.4 L, 1 Faraday = 96485 C).

Answer: Approximately 85,000 Coulombs

Question 1: List three safety precautions that must be taken when performing electrolysis of water in an industrial setting.

Answer: Use proper protective equipment, ensure proper ventilation, and handle electrical equipment carefully to prevent shocks.

Question 2: Identify the main variables that affect the rate of oxygen evolution during electrolysis.

Answer: Electric current, temperature, and concentration of the electrolyte.

Question 1: An industrial process produces 500 liters of oxygen per hour via electrolysis. If the efficiency of the process improves by 20%, how much additional oxygen can be produced per hour?

Answer: An additional 100 liters of oxygen per hour

Question 2: Explain how advancements in electrolysis technology could impact industries that rely on oxygen, such as healthcare or metal manufacturing.

Answer: Advancements can increase oxygen production efficiency, reduce costs, and enable more sustainable and large-scale oxygen supply, benefiting healthcare, metal processing, and environmental management.

Question 1: Describe the chemical reaction that occurs during the electrolysis of water to produce oxygen and hydrogen gases.

Answer: 2H2O(l) → 2H2(g) + O2(g)

Question 2: Why is pure oxygen important in medical applications?

Answer: Pure oxygen ensures effective treatment without contaminants that could harm patients.