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 - Having a pH less than 7 or a pOH greater than 7. Base - A substance that can accept a proton, release OH-, or donate an electron pair. Basic - Having a pH greater than 7 or a pOH less than 7. Buffer - A solution composed of an acid and its conjugate base that serves to moderate the pH of the solution. Conjugate Acid - A molecule that can be described as a base that has gained one proton. Conjugate Base - A molecule that can be described as an acid that has lost one proton.