Preparation of Sodium Bicarbonate
|Sodium Bicarbonate is a common household chemical known as Baking
Soda. It is inexpensive, abundant and slightly basic. It also generates
carbon dioxide gas when heated or exposed to acids.
characteristics account for its wide use in cleaning products, odor removal, tooth paste,
fire extinguishers and baking. Along with citric acid, it puts the fizz in Alka SelzerŪ
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|NH3 + CO2 +
H2O + NaCl = NaHCO3
who have done the NonMetals
experiment will recognize CO2 as an acidic gas and NH3
as a basic gas.
The reaction of the two is an acid base reaction which gives off heat and
produces a salt, NH4HCO3 with excess CO2.
You will use a pH indicator, phenolphthalein, to track the change in pH as
CO2 is added.
is very soluble in water giving rise to a solution called "Ammonium