Electrolysis of Aqueous Solutions Quiz

What is the primary purpose of electrolysis?

• To measure electrical current

• To create new elements

• To split compounds into their elements

• To combine elements into compounds

What is necessary for ions in an electrolyte to move freely?

• They must be in a liquid or dissolved state

• They must be in a plasma state

• They must be in a gaseous state

• They must be in a solid state

In an electrolysis experiment, what is the role of the cathode?

• It repels all ions

• It attracts positive ions

• It does not interact with ions

• It attracts negative ions

Which ion is discharged at the cathode if both metal and hydrogen ions are present?

• The ion with the smaller atomic mass

• The ion of the more reactive element

• The ion of the less reactive element

• The ion with the larger atomic mass

What happens at the anode if no halide ions are present?

• The nitrate ions are discharged

• The water molecules are discharged

• The hydroxide ions are discharged

• The sulfate ions are discharged

In the electrolysis of copper sulfate, which ions are discharged at the cathode?

• Hydrogen ions

• Copper ions

• Sulfate ions

• Hydroxide ions

What is formed at the anode during the electrolysis of copper sulfate?

• Copper metal

• Chlorine gas

• Oxygen and water

• Hydrogen gas

In the electrolysis of sodium chloride, which gas is formed at the cathode?

• Nitrogen gas

• Chlorine gas

• Oxygen gas

• Hydrogen gas

Which ion is discharged at the anode during the electrolysis of sodium chloride?

• Chloride ion

• Sulfate ion

• Sodium ion

• Hydroxide ion

What is the result of discharging chloride ions at the anode?

• Formation of hydrogen gas

• Formation of sodium metal

• Formation of chlorine gas

• Formation of water