(a) They give off their moisture to the
air. (Termed efflorescence.)
(b) They absorb moisture from the air.
(Termed hydroscopic or deliguescence.)
(c) They combine with oxygen.
(Termed oxidation).
(NO RESPONSE REQUIRED.
(4) To prevent deterioration of chemi-
cals, you must store chemicals in
___ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ containers.
airtight
(5) Storing chemicals in airtight con-
tainers prevents them from _______
___ _ _ _ _ _ _ _ _ _ _ _ .
deteriorating
(6) State why chemicals should be
stored in airtight containers.
___ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
___ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
___ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
To prevent them from deteriorating (any words that mean the same thing).
EXERCISE
1.
To prevent the deterioration of photographic chemicals, all containers used for storage must be
(select one)
a.
well ventilated.
b.
made of iron.
c.
airtight.
d.
made of thick glass.
5
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