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.
Hydrogen bonding between water molecules gives water its unique properties. For example, hydrogen bonding is re-sponsible for the lower density of ice, solid water, than of liquid water. Any one water molecule can form four hydro-gen bonds with four neighboring molecules.