NOTE: Each chemical must be com-
pletely dissolved before
adding the next chemical
to the solution.
In step 1, Mr X ____________ the
___ _ _ _ _ _ _ _ _ _ _ _ _ _.
In step 2, Mr X filled the mixing
container with hot ____________.
In step 3, Mr X ____________ each
chemical ____________.
weighed
(39) If Mr X were making three gallons
chemicals
of solution, only two gallons of
water
hot water would be used to dissolve
dissolved
the chemicals. After the chemicals
completely
have been dissolved completely,
Mr X would add cold water to the
solution to make the required
three gallons.
After dissolving the chemicals,
the fourth step is to add __________
___ _ _ _ _ _ _ _ _ _ _ to make the desired
amount of solution.
cold water
(40) Complete the list of steps below
which describe how to mix a photo-
graphic solution from bulk chemicals.
(a) ________________ the chemicals.
(b) Fill the mixing container with
___ _ _ _ _ _ ______________.
(c) ________________ the chemi-
cals completely.
(d) Add____________ ____________.
(a)
Weigh
(41) The fifth step is to store the chem-
(b)
hot water
ical solution in airtight containers
(c)
dissolve
and allow it to cool before use.
(d)
cold water
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