Solubility and Dissolving Factors

The video explains the difference between dissolving rates and solubility, highlighting factors that affect each. Dissolving rates are influenced by surface area, agitation, and temperature, while solubility is affected by pressure and temperature. The video also discusses how temperature can have a dual role, impacting both the rate and the amount of solute that can dissolve. Graphs are used to illustrate these concepts, showing how different substances react to changes in temperature and pressure.

What is the main difference between dissolving rate and solubility?

• Dissolving rate and solubility are the same concept.

• Dissolving rate is affected by pressure, while solubility is not.

• Dissolving rate is how much solute can dissolve, while solubility is how fast it dissolves.

• Dissolving rate is how fast a solute dissolves, while solubility is how much solute can dissolve.

Which factor does NOT affect the rate at which a solute dissolves?

• Surface area

• Agitation

• Pressure

• Temperature

How does increasing the surface area of a solute affect its dissolving rate?

• It increases the dissolving rate.

• It only affects the solubility, not the dissolving rate.

• It has no effect on the dissolving rate.

• It decreases the dissolving rate.

What happens to the solubility of gases when pressure is increased?

• Solubility decreases.

• Solubility increases.

• Solubility remains unchanged.

• Solubility is not affected by pressure.

Why do gases become less soluble when the temperature is increased?

• Gases form stronger intermolecular forces at higher temperatures.

• Higher temperatures increase the pressure on gases.

• Gases have more kinetic energy and escape the solution.

• Gases become more polar at higher temperatures.

What is the relationship between temperature and solubility for most solids?

• As temperature increases, solubility decreases.

• As temperature increases, solubility increases.

• Temperature has no effect on solubility.

• Solubility is inversely proportional to temperature.

Which substance is mentioned as having a significant increase in solubility with temperature?

• KNO3

• Carbon dioxide

• Sodium chloride

• Water

What is the effect of temperature on the solubility of large ionic compounds?

• Temperature has no effect on their solubility.

• Temperature decreases their solubility.

• Temperature increases their solubility significantly.

• Temperature makes them dissolve faster but not more.

Which factor affects both the rate of dissolving and the amount that can be dissolved?

• Agitation

• Surface area

• Temperature

• Pressure

What must be changed to dissolve a solute beyond its solubility point?

• Increase agitation

• Increase surface area

• Add more solvent

• Change pressure or temperature