Compare/Contrast molarity, osmolarity, osmolality, osmotic pressure, and tonicity.

Compare: They all have to do with concentrations

Contrast: Molarity - moles/1 L solution
Molality - moles/1 kg solvent
Osmolarity - osmoles/1 L solution
Osmolality - osmoles/1 kg solution

*These involve one solution

Tonicity - hypo, iso, hyper

*These involve two solutions w/ a membrane

molarity: measures the number of moles of solute per unit volume of solution
concentration of a solution expressed as the number of moles of solute per litre of solution

osmolarity: measures the number of osmoles of solute particles per unit volume of solution.

osmolality: concentration expressed as osmoles of solute per kilogram of water