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.
Not all of them do. Water is a highly polar solvent. Water molecules can interact strongly with ions, forming a shell around them that also screens the ions from each other. An ionic compound will dissolve readily if the interaction energy betwe...