Monobasic Acids. See Acid.
Organic Acids. Acids formed by, or derived from organic substances; e.g. acetic acid, tartaric acid, uric acid, &c.
Polybasic Acids. See Acid.
Pyro-acids. Acids resulting from the decomposition by heat of other acids, e.g. gallic acid, when heated, yields pyro-gallic acid.
Tribasic Acids. See Acid.
ACIDIFICA′TION. [Eng., Fr.] Syn. Acidifica′tio, L. In chemistry, the act, process, or state of acidifying, or of making, becoming, or impregnated with acid.
ACIDIM′ETER. Syn. Acidom′eter; Acidime′trum, &c., L.; Acidimètre, Fr. An instrument or apparatus employed in acidimetry.
The ordinary acidimeters of the chemist are small tubes, constructed to hold exactly 1000 grains of distilled water, at 60° Fahr., within the limits of their scale, which is accurately graduated into 100 divisions. They are used to contain the alkaline solutions (TEST-LIQUORS, NORMAL or STANDARD SOLUTIONS) employed in the following processes.
Beaumé’s Acidimeter, and others of the same class, are HYDROMETERS, and are described under that ‘head.’
ACIDIM′ETRY. Syn. Acidom′etry; Acidime′tria, &c., L.; Acidimétrie, Fr. The estimation of the strength or quantity of acid, in a free state, contained in any liquid. It is the reverse of ‘alkalimetry.’ Acidimetrical assays are understood to refer to the relative strengths of the same acids (i. e., the quantity of real acid of the same kind contained in the solutions examined), and not to the comparative strengths of acids of different composition or names.