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[4] [5] [6] It is also used as a primary standard for calibrating pH meters because, besides the properties just mentioned, its pH in solution is very stable. It also serves as a thermal standard in thermogravimetric analysis. [7] KHP dissociates completely in water, giving the potassium cation (K +) and hydrogen phthalate anion (HP − or ...
Potassium bromate (KBrO 3) for standardisation of sodium thiosulfate solutions; Potassium hydrogen phthalate (usually called KHP) for standardisation of aqueous base and perchloric acid in acetic acid solutions; Sodium carbonate for standardisation of aqueous acids: hydrochloric, sulfuric acid and nitric acid solutions (but not acetic acid)
The monopotassium salt, potassium hydrogen phthalate is a standard acid in analytical chemistry. Typically phthalate esters are prepared from the widely available phthalic anhydride. Reduction of phthalic acid with sodium amalgam in the presence of water gives the 1,3-cyclohexadiene derivative. [13]
Where W KHP is the mass (g) of potassium hydrogen phthalate (KHP) in 50 ml of KHP standard solution, V eq is the volume of titrant (ml) consumed by 50 ml KHP standard solution at the equivalent point, 204.23 g/mol is the molecular weight of KHP.
Potassium hydrogen phthalate This page was last edited on 27 October 2021, at 23:47 (UTC). Text is available under the Creative Commons Attribution-ShareAlike 4.0 ...
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