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Beckman model 72 pH meter, 1960. 781 pH/Ion Meter pH meter by Metrohm. 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 pH electrode and a reference electrode ...
A glass electrode is a type of ion-selective electrode made of a doped glass membrane that is sensitive to a specific ion. The most common application of ion-selective glass electrodes is for the measurement of pH. The pH electrode is an example of a glass electrode that is sensitive to hydrogen ions. Glass electrodes play an important part in ...
An elementary pH meter that can be used to monitor titration reactions. pH meter: A potentiometer with an electrode whose potential depends on the amount of H + ion present in the solution. (This is an example of an ion-selective electrode.) The pH of the solution is measured throughout the titration, more accurately than with an indicator; at ...
Milwaukee Electric Tool Corporation, known more commonly as Milwaukee Tool, is a multi-national company that develops, manufactures, and markets power tools, hand tools, tool accessories, tool storage, and personal protective equipment. [ 1] Milwaukee Tool was last sold in 2005 for $626.6 million to the Hong Kong -based Techtronic Industries ...
A pH indicator is a halochromic chemical compound added in small amounts to a solution so the pH ( acidity or basicity) of the solution can be determined visually or spectroscopically by changes in absorption and/or emission properties. [ 1] Hence, a pH indicator is a chemical detector for hydronium ions (H 3 O +) or hydrogen ions (H +) in the ...
August 9, 2024 at 3:00 AM. The 2024 Paris Olympic Games are coming to a close, and the competition remains intense on Friday, Aug. 9. Athletes worldwide are giving their all in the final days of ...
The Milwaukee Public Museum (MPM) is a natural and human history museum in downtown Milwaukee, Wisconsin. The museum was chartered in 1882 and opened to the public in 1884; it is a not-for-profit organization operated by the Milwaukee Public Museum, Inc. [ 2 ] MPM has three floors of exhibits and the first Dome Theater in Wisconsin.
Arnold Orville Beckman (April 10, 1900 – May 18, 2004) was an American chemist, inventor, investor, and philanthropist. While a professor at California Institute of Technology, he founded Beckman Instruments based on his 1934 invention of the pH meter, a device for measuring acidity (and alkalinity), later considered to have "revolutionized the study of chemistry and biology". [1]