Learning Task 1.
the guide questions.
SOLUTION PREPARATION
one or more
tions.
Laboratory
a volumetric flask
(commonly called a "vol flask").
Guide Questions:
1. What is a solution?
first method?
3. Are these materials available at home?
paring solutions?
5. Can you still prepare solutions using available materials at home? Why?
solutes in a solvent. The chemical present in a smaller amount, the solute, is
A solution is a homogeneous mixture created by dissolving
accurately known concentrations can be referred to as standard (stock) solu-
soluble in the solvent (the chemical present in a larger amount). Solutions with
dissolving the desired amount of solute into a volumetric flask of a specific vol-
These solutions are bought directly from the manufacturer or formed by
Solid A solution of known concentration can be prepared from solids by two
for experimental use in the laboratory. Preparing a Standard Solution from a
careful technique either will suffice for making solutions in General Chemistry
similar methods. Although inherent errors exist with each of the methods, with
In the first method, the solid solute is weighed out on weighing paper or
in a small container and then transferred directly to
A funnel might be helpful when transferring the solid into the slim neck
solvent is added until the meniscus of the liquid reaches the calibration mark
contents are swirled gently until the substance is completely dissolved. More
of the vol flask. A small quantity of solvent is then added to the vol flask and the
are mixed and completely dissolved. The disadvantage of this method is that
The vol flask is then capped and inverted several times until the contents
or funnel. Also, solid may be spilled when it is transferred into the slim neck of
some of the weighed solid may adhere to the original container, weighing paper,
ume. Stock solutions are frequently diluted to solutions of lesser concentration
on the neck of the vol flask (a process called "diluting to volume").
the vol flask. (http://faculty.sites.uci.edu/chem1l/files/2013/11/RDGsolnprep.pdf)
2. What are the materials mentioned in the handout in preparing a solution using the
4. Why is it that manufacturing companies have this special kind of instruments in pre-
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Answer:
wait
Explanation:
i can't remember.