How do weak electrolytes not dissove "completely". How does something only partly dissolve?

Answer 1

I think that "dissolution" and "dissociation" are two different concepts. One item may completely dissove in another, but may not dissociate, like suger in water. One item may completely dissociate once dissoved, like BaSO4 in water. I think that you are talking about week electrolytes not dissociate completely.
How does something only partly dissolve? There is always a solubility limit. For example, every one know that NaCl (salt) dissoves in water. However, You may not be able to dissolve 10kg of salt in 1kg of water.

Answer 2

You recognize what PH is? In chemistry this is called the Power of Hydrogen. Water is ionic in that it separates while still together into H+ and OH- When an electrolyte dissolves in water, the atoms of the molecule will attach to part of the water which attracts it, bringing it to a lower energy level. Just think of a weak electrolye as one that is lazy and sits on a bump. There are solubility levels and the weak has a lower.