Here's where things get fun. Just like the number of reps, 3-6 sets is the best range of volume for this training method. If you like your workouts paced like clockwork, take 30-60 seconds rest between each exercise.
The natural attraction between positive and negative keeps the ions surrounded by water molecules and therefore dissolved in solution. Many biochemicals are either polar molecules or charged ions (or both) so water makes an excellent solvent for them.
Insoluble Tissues Water's high polarity makes it a very poor solvent for nonpolar molecules and, oddly enough, this is another important and useful quality. Certain body tissues should not dissolve readily. Things such as bone, hair, muscles and cell membranes would be useless if they dissolved in water.