Acid

An acid (from the Latin acidus/acēre meaning sour) is a chemical substance whose aqueous solutions are characterized by a sour taste, the ability to turn blue litmus red, and the ability to react with bases and certain metals (like calcium) to form salts. An aqueous solution of an acid has a pH of less than 7 and is colloquially also referred to as 'acid' (as in 'dissolved in acid'), while the strict definition refers only to the solute. An acid usually contains a hydrogen atom bonded to a chemical structure that is still energetically favorable after loss of H+ (a positive hydrogen ion or proton). A lower pH means a higher acidity, and thus a higher concentration of positive hydrogen ions in the solution. Chemicals or substances having the property of an acid are said to be acidic.

There are three common definitions for acids: the Arrhenius definition, the Brønsted-Lowry definition, and the Lewis definition. The Arrhenius definition defines acids as substances which increase the concentration of hydrogen ions (H+), or more accurately, hydronium ions (H3O+), when dissolved in water. The Brønsted-Lowry definition is an expansion to include solvents other than water: an acid is a substance which can act as a proton donor. By this definition, any compound which can be deprotonated can be considered an acid. Examples include alcohols and amines which contain O-H or N-H fragments. A Lewis acid is a substance that can accept a pair of electrons to form a covalent bond. Examples of Lewis acids include all metal cations, and electron-deficient molecules such as boron trifluoride and aluminium trichloride.

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Acids in wine

The acids in wine are an important component in both winemaking and the finished product of wine. They are present in both grapes and wine, having direct influences on the color, balance and taste of the wine as well as the growth and vitality of yeast during fermentation and protecting the wine from bacteria. The measure of the amount of acidity in wine is known as the “titratable acidity” or “total acidity”, which refers to the test that yields the total of all acids present, while strength of acidity is measured according to pH, with most wines having a pH between 2.9 and 3.9. Generally, the lower the pH, the higher the acidity in the wine. However, there is no direct connection between total acidity and pH (it is possible to find wines with a high pH for wine and high acidity). In wine tasting, the term “acidity” refers to the fresh, tart and sour attributes of the wine which are evaluated in relation to how well the acidity balances out the sweetness and bitter components of the wine such as tannins. Three primary acids are found in wine grapes: tartaric, malic and citric acids. During the course of winemaking and in the finished wines, acetic, butyric, lactic and succinic acids can play significant roles. Most of the acids involved with wine are fixed acids with the notable exception of acetic acid, mostly found in vinegar, which is volatile and can contribute to the wine fault known as volatile acidity. Sometimes, additional acids, such as ascorbic, sorbic and sulfurous acids, are used in winemaking.

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Acid (disambiguation)

An acid is any chemical compound that, when dissolved in water, gives a solution with a pH less than 7.0.

Acid or ACID may also refer to:

Science

  • Corrosive substance, commonly (though imprecisely) referred to as an acid
  • Lysergic acid diethylamide (LSD), a semisynthetic, psychedelic drug, is commonly referred to as acid

    • Computing

  • Acid1, a web browser test page
  • Acid2
  • Acid3
  • Acid (computer virus), a computer virus
  • ACID Pro, professional digital audio workstation software
  • ACID (atomicity, consistency, isolation, durability), an initialism for the transactional properties of database management systems

    • Music

  • "Acid-like", the sound produced by the Roland TB-303 electronic music synthesizer

    • Genres

  • Acid music, in general
  • Acid house, a subgenre of house music
  • Acid jazz, a musical genre
  • Acid rock, a style of psychedelic rock
  • Acid techno, a style of techno
  • Acid trance, a style of trance music

    • Bands

  • Acid (band), a Japanese band
  • Acid (hip-hop), a Burmese hip-hop group
  • The Acid, an electronic music band
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    This page contains text from Wikipedia, the Free Encyclopedia - https://wn.com/Acid_(disambiguation)

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    PLAYLIST TIME:

    Acid

    by: Artichokes

    Verse
    There’s acid in my stomach and there’s blood in my veins
    Kids are busy playing in the sun and the rain
    I can’t help feeling concerned that I am insane
    There’s someone staring at me and a place is a plane
    The sky is far too bright but it is night where I stare
    Its sunny where I’m standing but its flooding somewhere
    And I can’t be concerned because I really don’t care
    If where I am is fine why do I think about there
    Chorus
    And its fine I don’t have the time
    For concern for the things I’ve learned
    And I know that someday I’ll grow
    But right now I just can’t figure out how
    Verse
    I’m walking up the stairs that make the life that I live
    I’m having trouble caring finding shits that I give
    And I can’t help pretending that I like to forgive
    Forgetting is the problem for the people I’m with
    There’s books up on the bookshelves but the spines aren’t cracked
    Forgotten where they’re standing but there’s knowledge untapped
    And I can’t be concerned because it’s knowledge I lack
    But someone somewhere wrote them and they make me feel bad




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