Section 2 – Part 3 The Solution Process Chapter 12 Section 2 – Part 3 The Solution Process

Learning targets By the end of this section you should be able to answer the questions: What is Henry’s law? What effect does temperature and pressure have on solubility?

Gas Solubility Pressure – has little effect on solid or liquid solutes in solution Pressure – has a LARGE effect on gas solutes in solution Increasing the pressure of a gas above the solution causes MORE gas to dissolve into the solution Click here for video

Gas Solubility Henry’s Law – the solubility of a gas in a liquid is directly proportional to the partial pressure of that gas on the surface of the liquid Click here for video

Gas Solubility Effervescence – the rapid escape of a gas from a liquid in which it is dissolved Click here for video #1 Click here for video #2

Gas Solubility Temperature – increasing the temperature usually decreases gas solubility Click here for video

Gas Solubility & IM forces Click here for a video

PERFORMANCE OF UNDERSTANDING How does pressure affect the solubility of a gas in a liquid? What law is a statement of this relationship? If the pressure of a gas above a liquid is increased, what happens to the amount of the gas that will dissolve in the liquid, if all other conditions remain constant?

ANSWERS How does pressure affect the solubility of a gas in a liquid? The more pressure, the more gas will be dissolved in the solution What law is a statement of this relationship? Henry’s law If the pressure of a gas above a liquid is increased, what happens to the amount of the gas that will dissolve in the liquid, if all other conditions remain constant? More gas will dissolve into the liquid

Are you on target? I CAN define Henry’s law. I CAN describe the effects of temperature and pressure on solubility.