[CHEM 1062] - Midterm Exam Guide - Everything you need to know! (19 pages long)
Document Summary
Solution = homogeneous mixture of 2 or more chemicals, 1 phase uniform distributions of molecules throughout. Gas in a liquid = oxygen in water. Solid in liquid = salt in water (ionic) Gas in gas = air; all gases infinitely soluble in each other. Colloidal suspensions = not solutions, very stable suspensions of very fine particles (nanometer) Do not settle in the liquid because of brownian motion of liquid molecules. Example: milk, nano particles of fat & proteins. Molarity (m) = number of moles of solute / volume usually in l of solution (total volume) Molality (m) - moles of solute / mass of solvent ; this does not depend on temperature. Percent- weight by weight = (mass of solute / mass of solution) * 100. Mass of solution = mass of solute + mass of solvent. Percent- volume by volume = (volume of solute / volume of solution) * 100.
