C4 Electrolysis of aqueous solutions Flashcards
What is electrolysis?
The process of using electricity to break down a compound into its elements.
True or False: Electrolysis can only occur in solid substances.
False
What are the two electrodes used in electrolysis?
Anode and cathode.
Fill in the blank: In electrolysis, the anode is the ______ electrode.
positive
What is produced at the cathode during the electrolysis of aqueous solutions?
Hydrogen gas or metal ions.
Multiple Choice: Which of the following ions move to the anode in electrolysis? A) Cations B) Anions C) Neutral atoms
B) Anions
What happens to water during electrolysis?
It can be broken down into hydrogen and oxygen gas.
True or False: The concentration of ions affects the products of electrolysis.
True
What is the role of the electrolyte in electrolysis?
To conduct electricity and provide ions for the reaction.
Fill in the blank: At the cathode, reduction ______ occurs.
reaction
What gas is typically produced at the anode when chloride ions are present?
Chlorine gas.
Multiple Choice: Which of the following is NOT a product of electrolysis of sodium chloride solution? A) Hydrogen B) Chlorine C) Sodium hydroxide D) Oxygen
D) Oxygen
Short Answer: What is the effect of increasing voltage on the rate of electrolysis?
It increases the rate of electrolysis.
What is meant by ‘selectivity’ in electrolysis?
The preference of certain ions to discharge over others.
True or False: Only non-metal ions can be discharged at the anode.
False
