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.
Best Answer: Both acids and alkalis (aka bases) are highly reactive chemicals, and their strength is measured on the pH scale. pH below 7 is acidic, pH 7 is neutral, and pH above 7 is alkali.Both acids and alkali will chemically burn you, if they are strong enough, but the mechanism of reaction is different.Acids *donate* a proton (hydrogen) to other chemicals, changing them, while alkalis *remove* protons.cid and alkali is two different things, acid A sour-tasting material (usually in a solution) that dissolves metals and other materials. Technically, a material that produces positive ions in solution. An acid is the opposite of a base and has a pH of 0 to 7.