Electrolysis Concepts and Applications

The video tutorial covers the process of plating objects with metals like chrome and gold for protection and decoration. It introduces electrolysis, explaining how ionic compounds are broken down using electricity in molten or aqueous states. The components of an electrolytic cell, including electrodes and electrolytes, are discussed. The video focuses on the electrolysis of molten lead bromide, detailing the reactions at the anode and cathode. A demonstration video illustrates the process, showing the production of bromine and metallic lead.

What are the two main purposes of metal plating?

• To change color and texture

• To improve fuel efficiency

• To increase weight and cost

• To protect from rusting and for decoration

Which of the following is NOT a condition for electrolysis to occur?

• Electricity must be passed through the compound

• The compound must be in a molten or aqueous state

• The compound must be ionic

• The compound must be in a solid state

What is the role of electrodes in an electrolytic cell?

• To increase the pressure

• To change the color of the solution

• To conduct electricity

• To provide heat

In an electrolytic cell, what is the charge of the anode?

• Variable

• Neutral

• Negative

• Positive

During the electrolysis of molten lead bromide, what is formed at the cathode?

• Bromine gas

• Lead metal

• Hydrogen gas

• Oxygen gas

What mnemonic can help remember the reactions at the electrodes during electrolysis?

• RED CAT and ANOX

• LEO GER

• FAT CAT

• OIL RIG

What visual indicator is observed at the anode during the electrolysis of molten lead bromide?

• White smoke

• Green sparks

• Red-brown fumes

• Blue flames

What is the final product formed at the anode during the electrolysis of molten lead bromide?

• Oxygen gas

• Lead metal

• Bromine gas

• Chlorine gas

Which of the following is a diatomic gas produced during the electrolysis of molten lead bromide?

• Oxygen

• Nitrogen

• Hydrogen

• Bromine

What is the purpose of using a crucible in the demonstration of electrolysis?

• To contain the molten compound

• To increase the reaction speed

• To change the color of the compound

• To cool the solution