Chemical Reaction of Chlorine and Sodium Iodide

The video tutorial explains the reaction between chlorine and sodium iodide, resulting in the formation of iodine, which appears as a dark purplish-black color. The iodine is more visible when an organic solvent like hexane is added, as it is more soluble in hexane than in water, causing it to separate and move to the hexane layer.

What is the initial state of chlorine when it is added to the sodium iodide solution?

• Solid

• Gas

• Dissolved in water

• Dissolved in hexane

What color does iodine exhibit when formed in the reaction?

• Yellow

• Dark purplish-black

• Green

• Red

Why is the color of iodine difficult to see when dissolved in water?

• It is colorless in water

• It reacts further with water

• It forms a precipitate

• The concentration is too low

What happens to iodine when hexane is added to the solution?

• It dissolves in the water layer

• It becomes a gas

• It forms a solid

• It moves to the hexane layer

Why does iodine move to the hexane layer when added?

• Hexane is a better solvent for sodium iodide

• Iodine reacts with hexane

• Hexane is denser than water

• Iodine is more soluble in hexane