https://www.asiachmical.com/caustic-soda-plant/caustic-soda-evaporation-plant.html
A, caustic soda,
Sodium hydroxide, inorganic compound, chemical formula NaOH, also known as caustic soda, caustic soda, solid alkali, caustic soda, caustic soda. Caustic soda has strong alkali, strong water absorption and other chemical characteristics, if directly placed in the air, can absorb water in the air, deliquescent into liquid sodium hydroxide, that is liquid alkali. In solid state, caustic soda can be divided into tablet alkali, solid alkali and granular alkali.
Second, the alkali
Sodium hydroxide, the inorganic compound, the chemical formula NaOH, is the state that caustic soda takes on when it is in solid state, so it is called caustic tablet.
Three, liquid alkali
Sodium hydroxide, the inorganic compound, the chemical formula NaOH, is the state that caustic soda is in when it is liquid, so it is called liquid alkali.
Four, soda ash,
Sodium Carbonate is a kind of inorganic compound with chemical formula Na2CO3 and molecular weight 105.99. It is also called soda, but it belongs to salt rather than alkali. Also known as soda or alkali ash, is an important inorganic chemical raw material. Sodium carbonate dissolved in water is alkaline, containing ten crystal water is colorless crystal, its crystal is unstable, easy to weathering in the air, the formation of white powder sodium carbonate.
We can learn from the four simple concepts above:
In fact, the composition of caustic soda, tablet alkali and liquid alkali are the same, but is a different presentation of a substance in different states. And soda is a chemical completely different from the above three, although with alkali word, but the composition is different.
So the composition of heaven is different, the use of the purpose is completely different
