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,...
Mathematical definition of pH is a little less intuitive but more useful in general. It states that the pH equals the negative logarithmic value of the concentration of hydrogen ion (H+) pH = -log [H+] A water source ‘s pH value is a function of its acidity, or alkalinity. The pH ...
Salt, in chemistry, substance produced by the reaction of an acid with a base. A salt consists of the positive ion (cation) of a base and the negative ion (anion) of an acid. The reaction between an acid and a base is called a neutralization reaction. Th
Combustion Reaction | Definition, Formula & Reactants 9:19 Single-Displacement Reaction | Types, Equation & Examples 7:53 Ch 11. Equilibrium Ch 12. Kinetics Ch 13. Thermodynamics Ch 14. Studying for Chemistry 101The pH Scale | Definition, Equation & Examples Related Study Materials Browse...
PH, quantitative measure of the acidity or basicity of aqueous or other liquid solutions. The term, widely used in chemistry, biology, and agronomy, translates the values of the concentration of the hydrogen ion into numbers between 0 and 14. Learn more
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...
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Definition of pH scales, standard reference values, measurement of pH and related terminology. Covington,A. K.,Bates,R. G.,Durst,R. A. Pure and Applied Chemistry . 1985Covington, A.K.; Bates, R.G.; Durst, R.A. Definition of pH scales, standard reference values,...
Although the two-letter symbol pH is extremely common in chemistry and elsewhere, its origin and early dissemination has only received scant attention amon
In chemistry, the concentration of any species is denoted by writing it in square brackets. For example, [X] means “the concentration of X.” Given the above definition of pH, the fact that a proton is simply a hydrogen atom that has lost its only electron (H+), and using the square...