1. The “Like-Dissolves-Like” Principle
Unit 8, Lesson 3
The “Like-Dissolves-Like” Principle

2. Like Dissolves Like
Polar or ionic solutes tend to dissolve in polar solvents.
Non-polar solutes tend to dissolve in non-polar solvents.

3. For example...

4. Real-Life Examples Sharpies Paint thinner
Milk relieving the feeling of spicy foods
Making coffee
Soap
10 min

5. Brain Break!

6. Polarity Party!
BeCl2, BF3, C2H4, CCl4, CH3Br, CH3Cl, CH3COOH, CH4, CHCl3, CO2, GeH4, H2, H2S, HCl, HF, HI, I2, N2, NH3, O2, O3, OF2, PCl3, SCl2, SeCl2, SF6, SiH4, SnH4, SO2
Draw the Lewis structure for your compound. Don’t forget that lone pairs of electrons take up space!
Now it’s time to mix and mingle!
Need: nametag stickers or labels. Play “mingle, mingle” and have students form groups according to like-dissolves-like. – 20 min

7. Homework Complete the “Like Dissolves Like” worksheet. Due tomorrow!
5 min