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Portable, or field pH meters, are handheld pH meters that are used to take the pH of a sample in a field or production site. [19] In-line or in situ pH meters, also called pH analyzers, are used to measure pH continuously in a process, and can stand-alone, or be connected to a higher level information system for process control. [20]
The pH range is commonly given as zero to 14, but a pH value can be less than 0 for very concentrated strong acids or greater than 14 for very concentrated strong bases. [2] The pH scale is traceable to a set of standard solutions whose pH is established by international agreement. [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.
denotes the academic study or practice of a certain field; the study of Greek -λογῐ́ᾱ (-logíā) base noun for the study of something hematology, urology: lumb(o)-, lumb(a)-of or relating to the part of the trunk between the lowest ribs and the pelvis. Latin lumbus or lumbaris, loin lumbar vertebrae: lymph(o)-lymph: Latin lympha, water ...
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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 ...
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Rankin/Bass characters, assemble! Another chapter of the Rankin/Bass Rudolph franchise, Rudolph and Frosty's Christmas In July features a team-up between Rudolph and Frosty (from the cartoon ...