Electrolysis of Lead Bromide Concepts

The video tutorial explains the electrolysis of molten lead bromide, focusing on the processes occurring at the electrodes. It describes the setup, including the power pack and electrodes, and details the movement of ions in the electrolyte. The tutorial covers the reactions at the cathode and anode, illustrating the formation of lead atoms and bromine molecules. It also explains the concepts of reduction and oxidation through half equations. The video concludes with practice questions to reinforce understanding.

What is the role of the power pack in the electrolysis setup?

• To mix the electrolyte

• To cool the electrodes

• To heat the electrolyte

• To provide a DC current

What is the chemical formula of lead bromide?

• PbBr2

• Pb2Br

• Pb2Br2

• PbBr

During electrolysis, which ions are attracted to the cathode?

• Hydrogen ions

• Lead cations

• Bromide anions

• Oxygen anions

What happens to lead cations at the cathode?

• They lose electrons and form lead ions

• They gain electrons and form lead atoms

• They lose electrons and form lead atoms

• They gain electrons and form bromine molecules

What is the charge of bromide ions?

• 2+

• 2-

• 1-

• 1+

What happens to bromide ions at the anode?

• They gain electrons and form bromine atoms

• They lose electrons and form bromine atoms

• They gain electrons and form lead atoms

• They lose electrons and form lead ions

What type of bond is formed between bromine atoms to create a stable molecule?

• Metallic bond

• Ionic bond

• Hydrogen bond

• Covalent bond

What is the term used to describe the gain of electrons by lead cations?

• Neutralization

• Reduction

• Precipitation

• Oxidation

What is the term used to describe the loss of electrons by bromide ions?

• Precipitation

• Oxidation

• Reduction

• Neutralization

What are the final products of the electrolysis of molten lead bromide?

• Lead ions and bromine ions

• Lead atoms and bromine molecules

• Lead ions and bromine molecules

• Lead molecules and bromine atoms