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Presentation transcript:

Do Now & Announcements Take out HW to be checked Answer Heating Curve Questions FRI 11/13: Unit 4 Quest

Review: Solutions Solutions are homogeneous mixtures that may be solid, liquid, or gaseous. If something is not homogeneous (i.e. it is heterogeneous ), it is NOT a solution! Solute vs. Solvent The solute is what is being dissolved. The solvent is what is doing the dissolving

Solubility Solubility= a measure of how much solute will dissolve in a certain amount of solvent

Factors that Affect Solubility Temperature—Solid Solutes: IN GENERAL As the temperature ↑, the solubility of a SOLID solute in a liquid solvent ↑ At a higher temperature, you can dissolve more solute in the same amount of solvent

Temperature: Gas Solutes As the temperature ↑, the solubility of a GAS solute in a liquid solvent ↓ At a higher temperature, you can dissolve less solute in the same amount of solvent

Factors that Affect Solubility: Pressure Solids & Liquids: Not much of an effect on solubility Gases: As the pressure ↑, the solubility of a GAS solute in a liquid solvent ↑ At a higher pressure, you can dissolve more solute in the same amount of solvent

Consider the terms unsaturated and saturated 1. Which term applies to a sponge that is dry? 2. Which term applies to a sponge that is soaked? 3. Can you add more water to a sponge that is already soaked?

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Answer questions based on graphs regarding boiling and freezing point of water

Colligative Properties The addition of a solute to a solvent causes the boiling point of the solvent to increase . This phenomenon is known as boiling point elevation The addition of a solute to a solvent causes the freezing point of the solvent to decrease. This phenomenon is known as freezing point depression The higher the concentration of solute particles, the greater the effect.