Chemistry DictionaryDefinition of pH What is pH? The pH scale is alternatively sometimes called the pH-acid-base scale and sometimes just the acid-base scale. In neutral solutions, i.e. those that are neither acidic nor basic, pH = 7.0. Acidic solutions are those with pH less than 7,...
pH Chemistry (Acids & Bases) - pH scale shows the range of strengths of acids and alkalis. On this scale, the strongest acid is 0 and the strongest alkali is 14. The universal indicator turns a different colour for all the numbers on the pH scale.
(Chemistry) potential of hydrogen; a measure of the acidity or alkalinity of a solution equal to the common logarithm of the reciprocal of the concentration of hydrogen ions in moles per cubic decimetre of solution. Pure water has a pH of 7, acid solutions have a pH less than 7, and alk...
The strength of a Bronsted-Lowry acid is measured using thepH scale. Lewis Acids Lewis acids are electron pair acceptors. They have an unoccupied low-energy atomic or molecular orbitals. The Lewis definition is more flexible than the traditional Bronsted-Lowry definition. ...
The modern era of pharmacology began in the sixteenth century, ushered in by the first major discoveries in chemistry. The understanding of how chemicals interact to produce certain effects within the body would eventually remove much of the guesswork and magic from medicine. ...
Pure & Applied ChemistryA. K. Convington, R. G. Bates, and R. A. Durst, "Definition of pH Scales, Standard Reference Values, Measurement of pH and Related Terminology," Pure & Appl. Chem., 57, 3, p. 534 (1985).Covington, A.K.; Bates, R.G.; Durst, R.A. Definition of pH...
molecular weight, relative molecular mass - (chemistry) the sum of the relative atomic masses of the constituent atoms of a molecule valence, valency - (chemistry) a property of atoms or radicals; their combining power given in terms of the number of hydrogen atoms (or the equivalent) pH, ...
The International Union of Pure and Applied Chemistry (IUPAC) has a slightly different pH scale based on electrochemical measurements of a standardbuffer solution. Essentially, the definition uses the equation: pH = -log aH+ where aH+stands for hydrogen activity, which is the effective concentration...
Learn the definition of pKa in chemistry and take a look at how to use pKa to determine the strength of an acid.
The acidity of a Brønsted acid can be quantitatively expressed by theaciddissociation constantof the compound inwateror some other specifiedmedium. The most familiar quantitative measure of acidity is thepH scale. Typical examples of Brønsted acids are acetic acid and sulfuric acid. ...