electrolysis Flashcards
What is electrolysis?
The process of using an electric current to drive a non-spontaneous chemical reaction.
True or False: Electrolysis is a spontaneous reaction.
False
What is an electrolyte?
A substance that conducts electricity when molten or in solution.
In electrolysis, where do positive ions move towards?
The negative electrode (cathode).
What is the name of the electrode connected to the positive terminal of the power supply in electrolysis?
Anode
What is the purpose of a salt bridge in an electrolytic cell?
To maintain electrical neutrality and complete the circuit.
What is the product of electrolysis of water?
Hydrogen gas and oxygen gas.
What is the half-reaction that occurs at the anode during the electrolysis of water?
2H2O(l) -> O2(g) + 4H+(aq) + 4e-
What is the half-reaction that occurs at the cathode during the electrolysis of water?
2H2O(l) + 2e- -> H2(g) + 2OH-(aq)
What is the process called when an ionic substance is broken down into its elements using electricity?
Electrolysis
What is the purpose of using an inert electrode in electrolysis?
To prevent unwanted side reactions.
What type of electrode is commonly used as the cathode in electrolysis?
Platinum
What is the term for the movement of ions towards the electrodes during electrolysis?
Electromigration
What is the standard electrode potential for the reduction of water to hydrogen gas at 25°C?
0.00 V
What is the standard electrode potential for the oxidation of water to oxygen gas at 25°C?
+1.23 V
