Lithium Bromide and Electrolytes

The video explores whether lithium bromide (LiBr) is an electrolyte or non-electrolyte. It defines an electrolyte as a substance that dissolves in water to produce ions, allowing the solution to conduct electricity. Lithium bromide, composed of lithium (a metal) and bromine (a non-metal), is identified as an ionic compound. According to solubility rules, compounds with bromide ions are generally soluble, and lithium bromide dissolves in water, dissociating into lithium and bromide ions. This dissociation confirms that lithium bromide is a strong electrolyte, as it conducts electricity effectively.

What is the main question addressed in the video?

• Whether LiBr is a metal or non-metal

• Whether LiBr is an electrolyte or non-electrolyte

• The solubility of LiBr in non-polar solvents

• The melting point of LiBr

What is a key characteristic of an electrolyte?

• It does not produce ions

• It conducts electricity when dissolved

• It dissolves in non-polar solvents

• It is always a solid at room temperature

Why is lithium bromide considered an ionic compound?

• Because it is a gas at room temperature

• Because it has a high melting point

• Because it does not dissolve in water

• Because it is composed of a metal and a non-metal

What happens to lithium bromide when it dissolves in water?

• It remains as a solid

• It evaporates

• It forms a precipitate

• It dissociates into lithium and bromide ions

What is the charge of the lithium ion in lithium bromide?

• 2-

• 1-

• 1+

• 2+

What is the significance of lithium bromide dissociating completely in water?

• It does not conduct electricity

• It becomes a strong electrolyte

• It forms a weak electrolyte

• It becomes a non-electrolyte

What conclusion is reached about lithium bromide in the video?

• It is a non-electrolyte

• It does not dissolve in water

• It is a weak electrolyte

• It is a strong electrolyte