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

2. 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?

3. 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
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4. 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
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5. Gas Solubility
Effervescence – the rapid escape of a gas from a liquid in which it is dissolved
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6. Gas Solubility
Temperature – increasing the temperature usually decreases gas solubility
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7. Gas Solubility & IM forces
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8. 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?

9. 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

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