You want to make your own rock candy. You boil some water and add a lot of sugar, but it won't all dissolve. No matter how much you stir, the undissolved sugar just sits there. Or does it? The forces of attraction that pull the solute into the solvent are still at work. The forces of attraction that hold the solute together are also at work, and they are attracting solute back out of the solution. In a saturated solution there is no noticeable change because the rate of solution is equal to the rate at which the solute comes out of solution. It is solution equilibrium. This PowerPoint presentation defines equilibrium and examines the nature of solution equilibrium, phase equilibrium, and chemical equilibrium. Worksheets on this topic are available free of charge on my website at www.evanschemistrycorner.com.