enow.com Web Search

Search results

  1. Results from the WOW.Com Content Network
  2. Wine chemistry - Wikipedia

    en.wikipedia.org/wiki/Wine_chemistry

    Wine is a complex mixture of chemical compounds in a hydro-alcoholic solution with a pH around 4. The chemistry of wine and its resultant quality depend on achieving a balance between three aspects of the berries used to make the wine: their sugar content, acidity and the presence of secondary compounds.

  3. List of reagents - Wikipedia

    en.wikipedia.org/wiki/List_of_reagents

    is an alkaline solution of potassium permanganate; used in organic chemistry as a qualitative test for the presence of unsaturation, such as double bonds; N-Bromosuccinimide: used in radical substitution and electrophilic addition reactions in organic chemistry. Also acts as a mild oxidizer to oxidize benzylic or allylic alcohols.

  4. Azeotropic distillation - Wikipedia

    en.wikipedia.org/wiki/Azeotropic_distillation

    In organic chemistry, some dehydration reactions are subject to unfavorable but fast equilibria. One example is the formation of dioxolanes from aldehydes: [9] RCHO + (CH 2 OH) 2 RCH(OCH 2) 2 + H 2 O. Such unfavorable reactions proceed when water is removed by azeotropic distillation.

  5. Dry distillation - Wikipedia

    en.wikipedia.org/wiki/Dry_distillation

    Dry distillation is the heating of solid materials to produce gaseous products (which may condense into liquids or solids). The method may involve pyrolysis or thermolysis, or it may not (for instance, a simple mixture of ice and glass could be separated without breaking any chemical bonds, but organic matter contains a greater diversity of molecules, some of which are likely to break).

  6. List of boiling and freezing information of solvents - Wikipedia

    en.wikipedia.org/wiki/List_of_boiling_and...

    This Wikipedia page provides a comprehensive list of boiling and freezing points for various solvents.

  7. Acid–base extraction - Wikipedia

    en.wikipedia.org/wiki/Acid–base_extraction

    Acid–base extraction is a subclass of liquid–liquid extractions and involves the separation of chemical species from other acidic or basic compounds. [1] It is typically performed during the work-up step following a chemical synthesis to purify crude compounds [2] and results in the product being largely free of acidic or basic impurities.

  8. Dry basis - Wikipedia

    en.wikipedia.org/wiki/Dry_basis

    An aqueous solution containing 2 g of glucose and 2 g of fructose per 100 g of solution contains 2/100=2% glucose on a wet basis, but 2/4=50% glucose on a dry basis.If the solution had contained 2 g of glucose and 3 g of fructose, it would still have contained 2% glucose on a wet basis, but only 2/5=40% glucose on a dry basis.

  9. Volatile acid - Wikipedia

    en.wikipedia.org/wiki/Volatile_acid

    Acetic acid is the primary volatile acid in wine, but smaller amounts of lactic, formic, butyric, propionic acid, carbonic acid (from carbon dioxide), and sulfurous acid (from sulfur dioxide) may be present and contribute to VA; [2] [3] [4] in analysis, measures may be taken to exclude or correct for the VA due to carbonic, sulfuric, and sorbic ...