Electrolysis Flashcards
What is electrolysis?
Electrolysis is a chemical process that uses electricity to break down compounds into their individual elements.
What are the two electrodes used in electrolysis called?
The two electrodes are called the anode (positive electrode) and the cathode (negative electrode).
True or False: Electrolysis can only occur in liquid solutions.
False: Electrolysis can occur in both liquid solutions and molten ionic compounds.
Fill in the blank: The process of electrolysis requires a _____ to conduct electricity.
medium
What is produced at the cathode during electrolysis?
Reduction occurs at the cathode, resulting in the gain of electrons and the formation of a substance.
What is produced at the anode during electrolysis?
Oxidation occurs at the anode, resulting in the loss of electrons and the formation of a substance.
What type of reaction is electrolysis classified as?
Electrolysis is classified as an electrochemical reaction.
What is the common use of electrolysis in industries?
Electrolysis is commonly used for metal extraction, electroplating, and purifying metals.
What is the electrolyte in electrolysis?
The electrolyte is a substance that conducts electricity when dissolved in water or melted, facilitating the electrolysis process.
Multiple choice: Which of the following is NOT an application of electrolysis? A) Water splitting B) Metal plating C) Combustion
C) Combustion
True or False: In electrolysis, cations move towards the anode.
False: Cations move towards the cathode.
What happens to the ions during electrolysis?
Ions are attracted to electrodes of opposite charge, where they undergo reduction or oxidation.
Fill in the blank: The process of electrolysis can be used to separate water into _____ and _____.
hydrogen, oxygen
Short answer: What is the role of a power supply in electrolysis?
The power supply provides the necessary electrical energy to drive the electrolysis process.
What kind of ions are attracted to the anode?
Anions (negatively charged ions) are attracted to the anode.
True or False: Electrolysis requires a direct current (DC) power supply.
True.
What is the significance of the discharge potential in electrolysis?
The discharge potential determines which ions will be reduced or oxidized at the electrodes.
Multiple choice: Which of the following ions will likely discharge first at the cathode during electrolysis? A) Na+ B) H+ C) Ca2+
B) H+
What is the equation for the electrolysis of water?
2H2O(l) → 2H2(g) + O2(g)
Fill in the blank: The gas produced at the anode during the electrolysis of water is _____.
oxygen
What is a common indicator used to show the presence of hydrogen gas?
A lit splint will produce a ‘pop’ sound when hydrogen gas is present.
Short answer: What safety precautions should be taken during electrolysis?
Wear safety goggles, work in a well-ventilated area, and handle chemicals carefully.
What is the effect of increasing the voltage on the rate of electrolysis?
Increasing the voltage generally increases the rate of electrolysis.
True or False: Electrolysis can be used to purify metals like copper.
True.
What is the main product of the electrolysis of molten NaCl?
Sodium metal (Na) is produced at the cathode, and chlorine gas (Cl2) is produced at the anode.
