Solubility Demonstration

What is the main reason hexane and water do not mix?

• Hexane and water have different polarities.

• Water is a nonpolar solvent.

• Water is denser than hexane.

• Hexane is denser than water.

What happens when iodine is added to the hexane and water mixture?

• Iodine makes the water and hexane mix.

• Iodine dissolves in hexane, turning it purple.

• Iodine does not dissolve in either liquid.

• Iodine dissolves in water, turning it purple.

Why does iodine dissolve in hexane but not in water?

• Because of the similarity in polarities.

• Iodine is hydrophilic.

• Due to hexane's higher density.

• Water is a stronger solvent for iodine.

What principle explains the solubility of iodine in hexane?

• Gravitational forces

• Atomic structure and intermolecular forces

• Magnetic forces

• Electrostatic forces

Why are there two distinct layers after adding iodine and shaking the test tube?

• Because iodine evaporates

• Due to the formation of a compound

• Because of the difference in solubility

• Owing to temperature differences

What color does the hexane layer turn after adding iodine?

• Brown

• Yellow

• Purple

• Blue

What is formed when potassium iodide is added to the mixture?

• Triiodide ion

• Hexane iodide

• Potassium hexane

• Iodine water

Why does the triiodide ion dissolve in water?

• Because it is hydrophobic

• Owing to its ionic nature

• Because of its large size

• Due to its nonpolar nature

What observation is made when potassium iodide is added to the test tube?

• No visible change occurs.

• The entire solution turns purple.

• A brown color appears in the water layer.

• The hexane layer turns brown.

What is the significance of the triiodide ion's solubility in water?

• It demonstrates the nonpolar nature of water.

• It proves that water can dissolve ionic compounds.

• It shows the polar nature of water.

• It indicates a chemical reaction between water and iodine.