WHY A CHEMICAL FORMULA WOULD REQUIRE MORE MONOHYDRATED
CHEMICALS THAN DESICCATED CHEMICALS.
a. Chemicals are manufactured in three states.
Crystals (contain a portion of water)
Dry (anhydrous or desiccated, meaning free of water)
b. Desiccated chemicals contain more of the active ingredients, weight for weight, than
chemicals containing water.
c. If you are mixing a solution and the formula calls for sodium carbonate desiccated and all
you have is sodium carbonate monohydrated, you would have to weigh out 17% more monohydrated to
allow for the extra weight of water.
The following frames of programmed text will help to explain the chemical formula.
(7) Chemicals are manufactured in three states:
(b) Crystals (contain a portion of water.
(c) Dry (anhydrous or dessicated,
meaning free of water).
A chemical that is labeled as
anhydrous or desiccated would
contain no _________________ and
would be in a __________________
AN = NOT . . . . . . HYDRO = WATER
The word ANHYDROUS means
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