WorksheetsElectrolysis of Water Concepts
Total questions: 15
Worksheet time: 8mins
In an electrolysis cell, what are the charges of the anode and cathode, respectively?
Anode is negative, cathode is positive.
Anode is positive, cathode is negative.
Both anode and cathode are positive.
Both anode and cathode are negative.
What is the primary meaning of the term "electrolysis"?
To generate electricity from a solution.
To use electricity to split something apart.
To combine elements using an electric current.
To measure electric current in a solution.
What is the term for the liquid being electrolyzed in an electrolysis setup?
Conductor
Insulator
Electrolyte
Solvent
Why is pure water considered a poor conductor of electricity?
It has too many free electrons.
It contains very few free ions.
Its molecules are too large to move.
It has a high resistance to current flow.
What effect does adding a small amount of sulfuric acid have on the electrolysis of water?
It stops the electrolysis process.
It decreases the ability of water to undergo electrolysis.
It greatly increases the ability of water to undergo electrolysis.
It changes the products obtained from electrolysis.
When water is electrolyzed, where do most of the gas bubbles form?
Around the anode.
Around the cathode.
Equally around both electrodes.
In the middle of the solution.
In the electrolysis of water using a Hofmann voltameter, what is the ideal volume ratio of hydrogen gas (H2) to oxygen gas (O2) produced?
1:1
1:2
2:1
3:1
How is oxygen gas typically identified in a laboratory setting?
It extinguishes a glowing splint.
It relights a glowing splint.
It produces a 'pop' sound with a lit splint.
It turns limewater cloudy.
What are the two main ions present in water that are attracted to the electrodes during electrolysis?
Sodium ions (Na+) and chloride ions (Cl-)
Hydrogen ions (H+) and hydroxide ions (OH-)
Potassium ions (K+) and sulfate ions (SO4 2-)
Calcium ions (Ca2+) and carbonate ions (CO3 2-)
According to Faraday's terminology, which type of ion moves towards the anode?
Cations
Anions
Protons
Neutrons
What type of reaction occurs at the anode during the electrolysis of water?
Reduction
Neutralization
Oxidation
Precipitation
What type of reaction occurs at the cathode during the electrolysis of water?
Oxidation
Reduction
Neutralization
Hydrolysis
What does the "OIL" in the "OIL RIG" mnemonic stand for?
Oxygen Is Lost
Oxidation Is Loss
Oil Is Liquid
Organic Is Light
When water is acidified with hydrochloric acid (HCl), what gas is produced at the anode instead of oxygen?
Hydrogen
Nitrogen
Chlorine
Carbon dioxide
In the electrolysis of hydrochloric acid, what is the ratio of hydrogen gas (H2) to chlorine gas (Cl2) produced?
2:1
1:2
1:1
3:1
