As a model of the new system a prototype allows for several forms of communication. First, it allows the developers to communicate to the users their understanding of the requirements. (Obviously before a prototype can be built there must be some initial requirements discussions between developers and users).
(Arrhenius) a substance that yeilds hydroxide ions in an aqueous solution; metallic oxides in water. Buffers. substances that in solution are capable of neutralizing, within limits both acids and bases, and thereby maintaining the original or constant pH of the solution; substances that prevent changes in pH. Ex. borax, sodium phosphates, and citrates. Crystallization. the process by which a substance is given definite form.
Acidic, Basic, Neutral Solutions Tutorial Key Concepts. A solution is defined as neutral if the concentration of hydrogen ions is the same as the concentration of hydroxide ions 1: neutral solution: [H +] = [OH-] where [H +] = concentration of hydrogen ions in solution and [OH-] is the concentration of hydroxide ions in solution