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
(39) If Mr X were making three gallons
of solution, only two gallons of
hot water would be used to dissolve
the chemicals. After the chemicals
have been dissolved completely,
Mr X would add cold water to the
solution to make the required
After dissolving the chemicals,
the fourth step is to add __________
___ _ _ _ _ _ _ _ _ _ _ to make the desired
amount of solution.
(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-
(d) Add____________ ____________.
(41) The fifth step is to store the chem-
ical solution in airtight containers
and allow it to cool before use.