Ads
related to: ph meter theory definition chemistry
Search results
Results from the WOW.Com Content Network
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] The pH meter measures the difference in electrical potential between a
The pH of aqueous solutions can be measured with a glass electrode and a pH meter or a color-changing indicator. Measurements of pH are important in chemistry , agronomy , medicine, water treatment, and many other applications.
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 ...
In chemistry, an acid–base reaction is a chemical reaction that occurs between an acid and a base.It can be used to determine pH via titration.Several theoretical frameworks provide alternative conceptions of the reaction mechanisms and their application in solving related problems; these are called the acid–base theories, for example, Brønsted–Lowry acid–base theory.
A buffer solution is a solution where the pH does not change significantly on dilution or if an acid or base is added at constant temperature. [1] Its pH changes very little when a small amount of strong acid or base is added to it. Buffer solutions are used as a means of keeping pH at a nearly constant value in a wide variety of chemical ...
From 1901 to 1938, Sørensen was head of the prestigious Carlsberg Laboratory, Copenhagen. [2] While working at the Carlsberg Laboratory he studied the effect of ion concentration on proteins [3] and, because the concentration of hydrogen ions was particularly important, he introduced the pH-scale as a simple way of expressing it in 1909. [4]
Electroanalysis: theory and applications in aqueous and non-aqueous media and in automated chemical control. Amsterdam: Elsevier. ISBN 978-0-444-42534-8. Bond, A. Curtis (1980). Modern polarographic methods in analytical chemistry. New York: M. Dekker. ISBN 978-0-8247-6849-2
Ads
related to: ph meter theory definition chemistry