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Sodium carbonate (also known as washing soda or
soda ash), Na2CO3 is a sodium salt of carbonic acid. It
most commonly occurs as a crystalline heptahydrate, which readily
effloresces to form a white powder, the monohydrate. Sodium
carbonate is domestically well known for its everyday use as a
water softener. It can be extracted from the ashes of many plants.
It is synthetically produced in large quantities from table salt
and limestone in a process known as the Solvay process.
Uses:The
manufacture of glass is one of
the most important uses of sodium carbonate. When combined with
silica (SiO2) and
calcium carbonate
(CaCO3) and heated to high
temperatures, then cooled rapidly, glass is produced. This type of
glass is known as soda lime
glass.
Sodium carbonate is also used as a relatively strong base in various settings. For example, sodium carbonate is used as a pH regulator to maintain stable alkaline conditions necessary for the action of the majority of developing agents. It is a common additive in municipal pools used to neutralize the acidic effects of chlorine and raise pH.In cooking, it is sometimes used in place of sodium hydroxide for lying, especially with German pretzels and lye rolls. These dishes are treated with a solution of an alkaline substance in order to change the pH of the surface of the food and thus improve browning.
In taxidermy, sodium carbonate added to boiling water will remove flesh from the skull or bones of trophies to create the
