Solution Chemistry Unit III 4. Polar and Non Polar Solvent

Like Dissolves Like Polar solutes dissolve in polar solvents and non-polar solutes dissolve in non-polar solvents Sucrose is a polar covalent solute Grease is a non polar covalent solute

How this Works Marbles Magnet

How this Works

How this Works

How this Works

How this Works

Like Dissolves Like A non-polar solute does not mix well with a polar solvent and visa versa. Alcohol or hydrochloric acid (HCl), being polar compounds, both dissolve well in the polar solvent water. Oil or CCl4, being non-polar, do not mix well at all with water.

London Forces Nonpolar solutes require solvents with sufficient London Forces to remove solute out of crystal and into solution Non polar solvents have large London forces Polar solvents have small London forces

Why doesn’t paint thinner dissolve salt? Answer: the paint thinner molecules have no charges to attract the ions (non-polar)

Overview Material Best Solvent Ionic Solids (NaCl) Polar covalent (water) Polar-covalent solids (sugar) Non-polar covalent (iodine, grease) Non-Polar covalent (paint thinner, gasoline, diesel fuel)

Hebden Do Exercises 17 on page 205 Do Exercise 18-22 on page 207