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A pH meter is a scientific instrument that measures the hydrogen-ion activity in water-based solutions, indicating its acidity or alkalinity expressed as pH. [2]
Gregg Henriques is an American psychologist. He is a professor for the Combined-Integrated Doctoral Program, at James Madison University, in Harrisonburg, Virginia, US.. He developed a Unified Theory Of Knowledge (UTOK), which consists of eight key ideas that Henriques claims results in a much more unified vision of science, psychology and philosophy.
Psychometrics is a field of study within psychology concerned with the theory and technique of measurement.Psychometrics generally covers specialized fields within psychology and education devoted to testing, measurement, assessment, and related activities. [1]
Primary pH standard values are determined using a concentration cell with transference by measuring the potential difference between a hydrogen electrode and a standard electrode such as the silver chloride electrode. The pH of aqueous solutions can be measured with a glass electrode and a pH meter or a color-changing indicator.
Jerome Kagan (February 25, 1929 – May 10, 2021) was an American psychologist, who was the Daniel and Amy Starch Research Professor of Psychology at Harvard University, as well as, co-faculty at the New England Complex Systems Institute. [1] [2] He was one of the key pioneers of developmental psychology. [3]
The bottom of a pH electrode balloons out into a round thin glass bulb. The pH electrode is best thought of as a tube within a tube. The inner tube contains an unchanging 1×10 −7 mol/L HCl solution. Also inside the inner tube is the cathode terminus of the reference probe.
In and of themselves, pH indicators are usually weak acids or weak bases. The general reaction scheme of acidic pH indicators in aqueous solutions can be formulated as: HInd (aq) + H 2 O (l) ⇌ H 3 O + (aq) + Ind − (aq) where, "HInd" is the acidic form and "Ind −" is the conjugate base of the indicator. Vice versa for basic pH indicators ...
Stephen A. Mitchell (July 23, 1946 – December 21, 2000) was an American clinical psychologist and psychoanalyst.His book with Jay Greenberg, Object Relations in Psychoanalytic Theory (1983), became a classic textbook in graduate schools and post-graduate institutions, providing a general overview and comparison of several psychoanalytic theories.