Lithium Sulfate and Ionic Compounds

The video tutorial explains how to write the equation for lithium sulfate (Li2SO4) plus water (H2O). It introduces the concept of solubility and demonstrates how to use a solubility table to determine that lithium sulfate is soluble in water. The video then describes the dissociation process of Li2SO4 in water, breaking it into lithium ions (Li+) and sulfate ions (SO4 2-). It concludes with a note on the reformation of solid lithium sulfate if water evaporates.

What type of compound is formed by lithium and sulfate ions?

• Molecular compound

• Covalent compound

• Ionic compound

• Metallic compound

What is the charge on the sulfate ion?

• 1+

• 2+

• 1-

• 2-

What is the chemical formula for lithium sulfate?

• LiSO4

• Li2SO4

• Li2S

• LiSO3

Which of the following best describes the nature of lithium in the compound?

• Non-metal

• Metal

• Metalloid

• Noble gas

What does the 'S' indicate in the solubility table for lithium sulfate?

• Solid

• Soluble

• Saturated

• Suspended

What happens to lithium sulfate when it is added to water?

• It forms a precipitate

• It dissolves and dissociates into ions

• It reacts to form a gas

• It remains unchanged

How many lithium ions are formed when lithium sulfate dissociates in water?

• One

• Two

• Three

• Four

What does 'aq' signify when written after a chemical formula?

• Gaseous state

• Aqueous or dissolved in water

• Liquid state

• Solid state

What would happen if the water in the solution evaporated?

• The lithium ions would evaporate

• The sulfate ions would evaporate

• The lithium sulfate would reform as a solid

• The ions would remain in solution