Page 280 - Chemistry eBook
P. 280
Solubility and Nature of Solution
• Some solutions dissolve well. Others don’t. • Rule: Like dissolves like.
Polar solute dissolves polar solvent. Polar molecules dissolve in polar solutions. Reminder: A polar molecule is an asymmetrical molecule.
Why won’t CO2 dissolve well in H2O?
CO2 is a nonpolar molecule (symmetrical) and H2O is a polar molecule (asymmetrical).
Nonpolar solute dissolves nonpolar solvent.
Water (a polar solvent) cannot dissolve paint (a nonpolar solute).
Turpentine paint remover (a nonpolar solvent) can dissolve
paint (a
nonpolar solute).
279 © UNIT 7: SOLUTIONS / SOLUBILITY
