{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}.
{Soda water}, originally, a beverage consisting of a weak
solution of sodium bicarbonate, with some acid to cause
effervescence; now, in common usage, a beverage consisting
of water highly charged with carbon dioxide (carbonic
acid). Fruit sirups, cream, etc., are usually added to
give flavor. See {Carbonic acid}, under {Carbonic}.
{Washing soda}, sodium carbonate. [Colloq.]
{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 bicarbonate}, a white crystalline substance,
{HNaCO3}, with a slight alkaline taste resembling that of
sodium carbonate. It is found in many mineral springs and
also produced artificially,. It is used in cookery, in
baking powders, and as a source of carbonic acid gas
(carbon dioxide) for soda water. Called also {cooking
soda}, {saleratus}, and technically, {acid sodium
carbonate}, {primary sodium carbonate}, {sodium
dicarbonate}, etc.
{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}, above 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.