Year 11 Electrolysis Flashcards
(25 cards)
What is electrolysis?
The process of using electricity to break down a compound into its elements.
What are the two electrodes used in electrolysis called?
Anode and cathode.
True or False: The anode is the negative electrode.
False.
Fill in the blank: In electrolysis, the positive ions move towards the ______.
cathode.
What is produced at the cathode during the electrolysis of molten sodium chloride?
Sodium metal.
What is produced at the anode during the electrolysis of molten sodium chloride?
Chlorine gas.
What is the electrolyte in the electrolysis of water?
Acid or salt solution.
What gas is produced at the anode when water is electrolyzed?
Oxygen.
What is the chemical equation for the electrolysis of water?
2H2O → 2H2 + O2.
True or False: Electrolysis can be used to purify metals.
True.
What happens to the ions in the electrolyte during electrolysis?
They move towards the electrodes.
What is the role of the power supply in electrolysis?
To provide the electrical energy needed for the reaction.
What type of reaction occurs at the anode?
Oxidation.
What type of reaction occurs at the cathode?
Reduction.
Fill in the blank: The process of electrolysis requires a ______ solution.
conducting.
True or False: Electrolysis can only be performed on ionic compounds.
False.
What do we call the substance that conducts electricity in electrolysis?
Electrolyte.
What is the main use of electrolysis in the industry?
Metal extraction and purification.
What is the electrode reaction for chlorine production at the anode during brine electrolysis?
2Cl- → Cl2 + 2e-.
What is the electrode reaction for hydrogen production at the cathode during brine electrolysis?
2H2O + 2e- → H2 + 2OH-.
Which metal is commonly extracted using electrolysis?
Aluminum.
Fill in the blank: In the electrolysis of copper(II) sulfate solution, ______ is deposited at the cathode.
Copper.
What happens to the concentration of the electrolyte during electrolysis?
It decreases.
What is the significance of using a diaphragm in electrolysis?
To separate products and prevent recombination.
