CHEM 110H Chapter Notes - Chapter 20: Particle Size, Miscibility, Hydrogen Bond
Document Summary
This supplementary reading for chem 110h describes colloids. Section 13. 7 of the text for a general background on colloids. Then read the more detailed description below and solve the problems at the end of the supplement. We begin by reviewing standard homogeneous and heterogeneous mixtures, and then move on to colloids. A simple definition of a solution is a mixture of two or more different types of molecules in which the different types are distributed evenly amongst each other. As we will see below, we also call a solution a molecular dispersion, since the two types of molecules are evenly distributed, or dispersed" in one another. As pointed out in table 13. 5 of the text, solutions can be made out of 7 of the 9 combinations of states. A few examples of solutions are air, which is a gas-gas mixture of ~80% n2 and ~20% o2, and brine, which is a solid-liquid mixture of sodium chloride dissolved in water.
