Demo: IMF 1. What is 250+ 250 = __________ 2. 250 mL H2O + 250 mL C2H5OH = __________ mL soln (yellow) (blue) 3. 250 mL NaOH + 250 mL HCl = ____________ mL soln (blue) (red) 250 mL volumetric flask-hand blown, accurate to the mL

Volume is not additive, but the mass is conserved.

Volume is not additive, but the mass is conserved. Because you have created water and spreads out and ions of Na+ and Cl-, you will be needing more volume.

Solubility of polar molecules Properties are due to intermolecular forces Like dissolves like Polar substances will dissolve polar molecules Non polar substances will dissolve non- polar molecules