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.
They keep the pH constant in the alkaline range.Single salt buffer: They consist of a salt of a weak acid and weak base and maintian the pH constant at 7,i.e., the neutral pH. In organisms, metabolic reactions are usually pH-specific. The reactions function best at the optimum pH.