9.5 Electrolysis

What happens at the positive electrode in a voltaic cell and in an electrolytic cell?

• A
• B
• C
• D

What are produced at positive/negative electrodes during electrolysis of molten NaCI?

• A
• B
• C
• D

What process occurs at cathode in voltaic cell and at anode in electrolytic cell?

• A
• B
• C
• D

Which factors affect amount of metal formed during electrolysis?

• I and II
• I and III
• II and III
• I, II and III

What occurs during electrolysis of a molten salt?

• Electricity is produced by a spontaneous redox reaction
• Electricity cause a non-spontaneous redox reaction to occur
• Electrons flow through the molten salt
• Electrons are removed from both ions of the molten salt

Tags

NGSS.HS-PS1-7

NGSS.HS-PS2-5

Object is electroplated with copper using copper(II) sulfate. Which statement is correct?

• Positive electrode increases in mass
• Concentration of Cu²⁺ ions in solution decreases
• Reduction occurs at positive electrode
• Reaction at negative electrode is Cu²⁺ + 2e^– → Cu

Tags

NGSS.HS-PS1-3

Which are used for electroplating of a metal spoon with copper?

• I and II
• I and III
• II and III
• I, II and III

Tags

NGSS.HS-PS2-5

What happens when molten NaCI is electrolysed in electrolytic cell?

• Chlorine is produced at positive electrode
• Sodium ions lose electrons at negative electrode
• Electrons flow through liquid from -ve electrode to +ve electrode
• Oxidation occurs at -ve electrode and reduction at +ve electrode

Tags

NGSS.HS-PS1-2

Electrolysis of a molten salt containing Sn²⁺. Which change will double amount of tin produced?

• I
• II
• I and II
• I, II and III

NaCl_(aq) was electrolysed with platinum. State the major product at +ve electrode in each case?

• A
• B
• C
• D