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and then, acting as a weak acid, hydrogen phthalate reacts reversibly with water to give hydronium (H 3 O +) and phthalate ions. HP − + H 2 O ⇌ P 2− + H 3 O + KHP can be used as a buffering agent in combination with hydrochloric acid (HCl) or sodium hydroxide (NaOH). The buffering region is dependent upon the pKa, and is typically +/- 1.0 ...
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 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)
An element–reaction–product table is used to find coefficients while balancing an equation representing a chemical reaction. Coefficients represent moles of a substance so that the number of atoms produced is equal to the number of atoms being reacted with. [1] This is the common setup: Element: all the elements that are in the reaction ...
Phthalates (US: / ˈ θ æ l eɪ t s / UK: / ˈ θ ɑː l eɪ t s ˌ ˈ f θ æ l ɪ t s / [1] [2]), or phthalate esters, are esters of phthalic acid. They are mainly used as plasticizers, i.e., substances added to plastics to increase their flexibility, transparency, durability, and longevity. They are used primarily to soften polyvinyl ...
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 ...
The Gran plot is based on the Nernst equation which can be written as E = E 0 + s log { H + } {\displaystyle E=E^{0}+s\log\{H^{+}\}} where E is a measured electrode potential, E 0 is a standard electrode potential, s is the slope, ideally equal to RT/nF, and {H + } is the activity of the hydrogen ion.