Electrolysis Flashcards
What is electrolysis?
Electrolysis is a chemical process that uses electrical energy to drive a non-spontaneous reaction.
True or False: Electrolysis can be used to decompose water into hydrogen and oxygen.
True
Fill in the blank: The process of electrolysis occurs in an __________.
electrolytic cell
What are the two types of electrodes used in electrolysis?
Anode and cathode
Multiple Choice: What is the purpose of the anode in electrolysis? A) To supply electrons B) To attract cations C) To produce hydrogen D) To dissolve electrolytes
B) To attract cations
What is produced at the cathode during the electrolysis of water?
Hydrogen gas
True or False: The electrolyte must be a liquid for electrolysis to occur.
False
What is the chemical equation for the electrolysis of water?
2H2O(l) → 2H2(g) + O2(g)
Fill in the blank: The flow of electric current through the electrolyte causes __________ reactions.
redox
Multiple Choice: Which of the following is a common electrolyte used in electrolysis? A) NaCl B) H2O C) C6H12O6 D) O2
A) NaCl
What does the term ‘electrolyte’ refer to?
A substance that conducts electricity when dissolved in water or molten.
True or False: Electrolysis can be used for metal plating.
True
What is the role of the cathode in electrolysis?
It is where reduction occurs, gaining electrons.
Fill in the blank: The process of electrolysis is often used in the __________ of metals.
refining
Multiple Choice: Which of the following is NOT a product of electrolysis of sodium chloride solution? A) Chlorine gas B) Hydrogen gas C) Sodium metal D) Sodium hydroxide
C) Sodium metal
What happens to the anions at the anode during electrolysis?
They lose electrons and are oxidized.
True or False: The amount of substance produced at each electrode is directly proportional to the electric charge passed through the electrolyte.
True
What is Faraday’s first law of electrolysis?
The mass of a substance produced at an electrode is directly proportional to the quantity of electricity that passes through the electrolyte.
What is the standard unit of electric charge used in electrolysis calculations?
Coulomb (C)
Fill in the blank: The __________ is the electrode where oxidation occurs during electrolysis.
anode
