enow.com Web Search

Search results

  1. Results from the WOW.Com Content Network
  2. Potassium hydrogen phthalate - Wikipedia

    en.wikipedia.org/wiki/Potassium_hydrogen_phthalate

    The pKa of KHP is 5.4, so its pH buffering range would be 4.4 to 6.4; however, due to the presence of the second acidic group that bears the potassium ion, the first pKa also contributes to the buffering range well below pH 4.0, which is why KHP is a good choice for use as a reference standard for pH 4.00.

  3. Equivalent weight - Wikipedia

    en.wikipedia.org/wiki/Equivalent_weight

    It is necessary to calculate the mass of a solid acid which will react with about 20 cm 3 of this solution (for a titration using a 25 cm 3 burette): suitable solid acids include oxalic acid dihydrate, potassium hydrogen phthalate and potassium hydrogen iodate. The equivalent weights of the three acids 63.04 g, 204.23 g and 389.92 g ...

  4. Phthalic acid - Wikipedia

    en.wikipedia.org/wiki/Phthalic_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.

  5. Phthalates - Wikipedia

    en.wikipedia.org/wiki/Phthalates

    General chemical structure of orthophthalates. (R and R' are general placeholders.) 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 ...

  6. Category:Phthalates - Wikipedia

    en.wikipedia.org/wiki/Category:Phthalates

    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 ...

  7. Potassium phthalimide - Wikipedia

    en.wikipedia.org/wiki/Potassium_phthalimide

    Potassium phthalimide is a chemical compound of formula C 8 H 4 KNO 2. It is the potassium salt of phthalimide , and usually presents as fluffy, very pale yellow crystals. It can be prepared by adding a hot solution of phthalimide in ethanol to a solution of potassium hydroxide in ethanol; the desired product precipitates.

  8. Category:Potassium compounds - Wikipedia

    en.wikipedia.org/wiki/Category:Potassium_compounds

    Potassium compounds are those chemical compounds which contain the chemical element potassium. Subcategories This category has the following 3 subcategories, out of 3 total.

  9. Acid value - Wikipedia

    en.wikipedia.org/wiki/Acid_value

    In chemistry, acid value (AV, acid number, neutralization number or acidity) is a number used to quantify the acidity of a given chemical substance.It is the quantity of base (usually potassium hydroxide (KOH)), expressed as milligrams of KOH required to neutralize the acidic constituents in 1 gram of a sample.