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.
1 Adding a base decreases the concentration of H 3 O + ions in the solution. 2  An acid and a base are like chemical opposites. 3  If a base is added to an acidic solution, the solution becomes less acidic and moves toward the middle of the pH scale. 4  This is called neutralizing the acid. This is called neutralizing the acid. 2  If an acid is added to a basic solution, the solution becomes less basic and moves toward the middle of the pH scale. 3  This is called neutralizing the base.