The Science Behind Dissolving: Exploring Solutes, Solvents, and Molecular Interactions

The video explains the process of dissolution, where solutes like salt dissolve in solvents like water. It describes the molecular interactions involved, such as ion-dipole interactions, and introduces the concept of dynamic equilibrium, where dissolution and crystallisation occur simultaneously. The video also discusses how solubility is affected by temperature and pressure, leading to the formation of saturated solutions.

What happens when you add food color to water?

• It instantly mixes completely.

• It gradually spreads throughout the water.

• It remains at the bottom of the glass.

• It evaporates immediately.

What is the nature of water molecules that helps in dissolving salt?

• Magnetic with strong attraction.

• Neutral with no interaction.

• Polar with partial charges.

• Non-polar with no charge.

What happens to sodium ions when they break free from a salt crystal in water?

• They float to the surface.

• They are attracted to the oxygen atoms of water molecules.

• They evaporate into the air.

• They sink to the bottom.

What is the process called when dissolved ions reattach to the crystal?

• Crystallisation

• Dissolution

• Evaporation

• Condensation

What is dynamic equilibrium in the context of a solution?

• When all solute is dissolved completely.

• When the solution stops changing visibly.

• When the rates of dissolution and crystallisation are equal.

• When the solution becomes a solid.

What is a saturated solution?

• A solution that is boiling.

• A solution where no more solute can dissolve at a given temperature and pressure.

• A solution with excess solute.

• A solution with no solute.

What happens to the rate of crystallisation as more salt is added to a solution?

• It increases.

• It remains constant.

• It decreases.

• It stops completely.

What is solubility?

• The temperature at which a solution boils.

• The speed at which a solute dissolves.

• The maximum amount of solute that can dissolve in a solution at a given temperature and pressure.

• The amount of solvent in a solution.

How can solubility be affected?

• By changing the color of the solute.

• By altering the temperature and pressure.

• By stirring the solution.

• By adding more solvent.

What will be discussed in the upcoming videos?

• The effect of light on solubility.

• The effect of gravity on crystallisation.

• The impact of temperature and pressure on solubility.

• The role of sound in dissolution.