A numerical designation of acidity and alkalinity in soil (See Reaction, soil).
A logarithmic index for the hydrogen ion concentration in an aqueous solution. Used as a measure of acidity of a solution; given pH = log 10 (1/[H+]), where [H+ ] is the hydrogen ion concentration. A pH below 7 indicates acidity, and one above 7 alkalinity.
A measure of the relative acidity or alkalinity of a solution. It is the reciprocal of the logarithm of the hydrogen-ion activity in the solution. The pH values range from 0 to 14. A value of 7 is taken as neutral with values of decreasing magnitude below this indicating acidity and with values of increasing magnitude above this indicating increasing alkalinity.
The negative logarithm of the reciprocal of H ion concentration in a solution; pH of 7 indicates neutrality, higher values indicate alkalinity ad lower values acidity. ( BCFT modif .).
Degree of acidity or alkalinity measured on a scale from 0 to 14 with 7 the neutral point. Measurement of pH is important to quality control in making paper and pigments and in the preparation of platemaking chemicals. For explanation of test to determine pH, see Chapter 6. pH control of press fountain solutions is also essential to assure maximum plate-life and uniform ink drying.
a measure of the acidity or basicity related to the concentration of the hydrogen ion.
Measure of hydrogen ion concentration in a liquid. The lower it is (0 to 7) the more acidic it is. The higher it is the more alkaline (7-14) it is.
(See Reaction, soil). A numerical designation of acidity and alkalinity in soil.
A measure of the level of acid in paper or other materials. The value is measured on a scale from 0 to 14: 7.0 is the neutral point, values above 7.0 are alkaline, and values below 7.0 are acidic.
The degree of acidity of alkalinity measured on a scale from 0 to 7 is acid; from 7 to 14 is alkaline, and 7 is neutral. Numerous instruments are available for measuring the pH value.
A convenient method of expressing small differences in the acidity 'or alkalinity of solutions. Neutrality = pH 7.1; lower values indicate increasing acidity; higher values indicate increasing alkalinity.
Concentration of hydrogen ions in a solution, being a measurement of its acidity or alkalinity.
Degree of acidity or alkalinity measured on a scale from 0 to 14 with 7 the neutral point. Measurement of pH is important to quality control in making paper and pigments and in the preparation of platemaking chemicals. pH control of press fountain solutions is also essential to assure maximum plate-life and uniform ink drying. From 0 to 7 is acid; from 7 to 14 is alkaline.
The concentration of the hydrogen ion in a material. A pH value of 7 is considered neutral. Lower values are acidic; higher values are alkaline.
The unit of measurement to express acidity. 7 is the neutral acidity value of water and any number lower than this would be described as more acidic. Therefore, the lower a pH value, the more acidic a wine will taste.
A method of expressing differences in the acidity or alkalinity of a solution. A figure of 7 is regarded as neutral, figures below this indicate the decree of acidity and above alkalinity.
A measure of acidity or alkalinity of groundwater or soil water extract based on the hydrogen ion content: pH = -log10(hydrogen ion content) pH 7.0 indicates acidity. pH 7.0 indicates alkalinity.
nbspScale used for expressing the acidity or alkalinity of solutions.
