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The difference between successive pK a values is sufficiently large so that salts of either monohydrogen phosphate, HPO 2− 4 or dihydrogen phosphate, H 2 PO − 4, can be prepared from a solution of phosphoric acid by adjusting the pH to be mid-way between the respective pK a values.
At pH 1 or lower, the phosphoric acid is practically undissociated. Around pH 4.7 (mid-way between the first two pK a values) the dihydrogen phosphate ion, [H 2 PO 4] −, is practically the only species present. Around pH 9.8 (mid-way between the second and third pK a values) the monohydrogen phosphate ion, [HPO 4] 2−, is the only species ...
Pyrophosphoric acid. In chemistry, a phosphoric acid, in the general sense, is a phosphorus oxoacid in which each phosphorus (P) atom is in the oxidation state +5, and is bonded to four oxygen (O) atoms, one of them through a double bond, arranged as the corners of a tetrahedron.
A simple qualitative method to determine the presence of phosphate ions in a sample is as follows. A small amount of the sample is acidified with concentrated nitric acid, to which a little ammonium molybdate is added.
Hyperphosphatemia is a condition characterized by elevated levels of phosphate in the blood, often caused by kidney dysfunction or excessive intake.
A polyphosphate is a salt or ester of polymeric oxyanions formed from tetrahedral PO 4 structural units linked together by sharing oxygen atoms.Polyphosphates can adopt linear or a cyclic (also called, ring) structures.
The often-cited pK a of ~7.2 is the value extrapolated to zero ionic strength, and is not applicable at physiological ionic strength. Phillips et al. [5] measured the pK a at 10, 25, and 37 °C at various ionic strengths. For the latter two temperatures they report pK a in Debye-Hückel equations (plotted in the accompanying figure for μ up to ...
Reference ranges (reference intervals) for blood tests are sets of values used by a health professional to interpret a set of medical test results from blood samples. Reference ranges for blood tests are studied within the field of clinical chemistry (also known as "clinical biochemistry", "chemical pathology" or "pure blood chemistry"), the ...