sal soda
    n 1: a sodium salt of carbonic acid; used in making soap powders
         and glass and paper [syn: sodium carbonate, washing
         soda, sal soda, soda ash, soda]

Sal \Sal\ (s[a^]l), n. [L. See Salt.] (Chem. & Pharm.)
   Salt.
   [1913 Webster]

   Sal absinthii [NL.] (Old Chem.), an impure potassium
      carbonate obtained from the ashes of wormwood (Artemisia
      Absinthium).

   Sal acetosellae [NL.] (Old Chem.), salt of sorrel.

   Sal alembroth. (Old Chem.) See Alembroth.

   Sal ammoniac (Chem.), ammonium chloride, NH4Cl, a white
      crystalline volatile substance having a sharp salty taste,
      obtained from gas works, from nitrogenous matter, etc. It
      is largely employed as a source of ammonia, as a reagent,
      and as an expectorant in bronchitis. So called because
      originally made from the soot from camel's dung at the
      temple of Jupiter Ammon in Africa. Called also muriate of
      ammonia.

   Sal catharticus [NL.] (Old Med. Chem.), Epsom salts.

   Sal culinarius [L.] (Old Chem.), common salt, or sodium
      chloride.

   Sal Cyrenaicus. [NL.] (Old Chem.) See Sal ammoniac above.
      

   Sal de duobus, Sal duplicatum [NL.] (Old Chem.),
      potassium sulphate; -- so called because erroneously
      supposed to be composed of two salts, one acid and one
      alkaline.

   Sal diureticus [NL.] (Old Med. Chem.), potassium acetate.
      

   Sal enixum [NL.] (Old Chem.), acid potassium sulphate.

   Sal gemmae [NL.] (Old Min.), common salt occuring native.
      

   Sal Jovis [NL.] (Old Chem.), salt tin, or stannic chloride;
      -- the alchemical name of tin being Jove.

   Sal Martis [NL.] (Old Chem.), green vitriol, or ferrous
      sulphate; -- the alchemical name of iron being Mars.

   Sal microcosmicum [NL.] (Old Chem.) See Microcosmic salt,
      under Microcosmic.

   Sal plumbi [NL.] (Old Chem.), sugar of lead.

   Sal prunella. (Old Chem.) See Prunella salt, under 1st
      Prunella.

   Sal Saturni [NL.] (Old Chem.), sugar of lead, or lead
      acetate; -- the alchemical name of lead being Saturn.

   Sal sedativus [NL.] (Old Chem.), sedative salt, or boric
      acid.

   Sal Seignette [F. seignette, sel de seignette] (Chem.),
      Rochelle salt.

   Sal soda (Chem.), sodium carbonate. See under Sodium.

   Sal vitrioli [NL.] (Old Chem.), white vitriol; zinc
      sulphate.

   Sal volatile. [NL.]
   (a) (Chem.) See Sal ammoniac, above.
   (b) Spirits of ammonia.
       [1913 Webster]

Soda \So"da\, n. [It., soda, in OIt., ashes used in making
   glass, fr. L. solida, fem. of solidus solid; solida having
   probably been a name of glasswort. See Solid.]
   1. (Chem.)
      (a) Sodium oxide or hydroxide.
      (b) Popularly, sodium carbonate or bicarbonate. Sodium
          bicarbonate is also called baking soda
          [1913 Webster]

   2. same as sodium, used in terms such as bicarbonate of
      soda.
      [PJC]

   3. same as soda water.
      [PJC]

   4. a non-alcoholic beverage, sweetened by various means,
      containing flavoring and supersaturated with carbon
      dioxide, so as to be effervescent when the container is
      opened; -- in different localities it is variously called
      also soda pop, pop, mineral water, and minerals.
      It has many variants. The sweetening agent may be natural,
      such as cane sugar or corn syrup, or artificial, such as
      saccharin or aspartame. The flavoring varies widely,
      popular variants being fruit or cola flavoring.
      [PJC]

   Caustic soda, sodium hydroxide.

   Cooking soda, sodium bicarbonate. [Colloq.]

   Sal soda. See Sodium carbonate, under Sodium.

   Soda alum (Min.), a mineral consisting of the hydrous
      sulphate of alumina and soda.

   Soda ash, crude sodium carbonate; -- so called because
      formerly obtained from the ashes of sea plants and certain
      other plants, as saltwort (Salsola). See under Sodium.
      

   Soda fountain, an apparatus for drawing soda water, fitted
      with delivery tube, faucets, etc.

   Soda lye, a lye consisting essentially of a solution of
      sodium hydroxide, used in soap making.

   Soda niter. See Nitratine.

   Soda salts, salts having sodium for the base; specifically,
      sodium sulphate or Glauber's salts.

   Soda waste, the waste material, consisting chiefly of
      calcium hydroxide and sulphide, which accumulates as a
      useless residue or side product in the ordinary Leblanc
      process of soda manufacture; -- called also alkali
      waste.

   Washing soda, sodium carbonate. [Colloq.]
      [1913 Webster]

Sodium \So"di*um\, n. [NL., fr.E. soda.] (Chem.)
   A common metallic element of the alkali group, in nature
   always occuring combined, as in common salt, in albite, etc.
   It is isolated as a soft, waxy, white, unstable metal, so
   highly reactive that it combines violently with water, and to
   be preserved must be kept under petroleum or some similar
   liquid. Sodium is used combined in many salts, in the free
   state as a reducer, and as a means of obtaining other metals
   (as magnesium and aluminium) is an important commercial
   product. Symbol Na (Natrium). Atomic weight 22.990.
   Specific gravity 0.97.
   [1913 Webster]

   Sodium amalgam, an alloy of sodium and mercury, usually
      produced as a gray metallic crystalline substance, which
      is used as a reducing agent, and otherwise.

   Sodium carbonate, a white crystalline substance,
      Na2CO3.10H2O, having a cooling alkaline taste, found in
      the ashes of many plants, and produced artifically in
      large quantities from common salt. It is used in making
      soap, glass, paper, etc., and as alkaline agent in many
      chemical industries. Called also sal soda, washing
      soda, or soda. Cf. Sodium bicarbonate, and Trona.
      

   Sodium chloride, common, or table, salt, NaCl.

   Sodium hydroxide, a white opaque brittle solid, NaOH,
      having a fibrous structure, produced by the action of
      quicklime, or of calcium hydrate (milk of lime), on sodium
      carbonate. It is a strong alkali, and is used in the
      manufacture of soap, in making wood pulp for paper, etc.
      Called also sodium hydrate, and caustic soda. By
      extension, a solution of sodium hydroxide.
      [1913 Webster]