Text of Volumetric Analysis Apparatus. The Volumetric Flask
Slide 1
Volumetric Analysis Apparatus
Slide 2
The Volumetric Flask
Slide 3
Volumetric Flask Weigh out a specific mass of solute on a
clean, dry clock glass. Add the solute to a beaker containing a
small volume of water. Using a wash bottle wash all traces of the
solute from the clock glass into the beaker. Stir the mixture with
a clean glass rod.
Slide 4
Volumetric Flask Using a funnel transfer the contents of the
beaker into a clean dry volumetric flask. Wash all traces from the
beaker, glass rod and funnel into the flask. Continue to add
deionised water into the flask until the level is just below the
mark on the flask.
Slide 5
Volumetric Analysis Using a dropper fill the rest of the
volumetric flask until the bottom of the meniscus is on the
mark.
Slide 6
Volumetric Analysis Stopper the flask and invert about 30
times. This ensures the mixture is homogenous.
Slide 7
The Pipette
Slide 8
Rinse with deionised water. Rinse with some of the solution it
is to contain. Use a pipette filler to draw the level of the liquid
to above the mark. Allow the liquid to run into a waste beaker
until the bottom of the meniscus is on the mark.
Slide 9
Touch the pipette against the side of a glass beaker. This will
remove any droplet of liquid that might be adhering to the pipette.
Allow the liquid to drain under gravity in to the conical flask.
Touch the tip of the pipette to the side of the flask but do not
blow the last drop out. The Pipette
Slide 10
The Burette
Slide 11
Rinse with deionised water. Rinse with some of the solution it
is to contain. Use a small funnel when filling the burette. The
burette is filled almost to the top and then the tap is opened to
fill the part below the tap. Re-fill the burette until the bottom
of the meniscus is on the mark.
Slide 12
Conical Flask
Slide 13
Its design allows it to be swirled without the solution
splashing out. Before use, wash out with deionised water. Do not
wash out with the solution it is to contain. It will be holding an
exact volume of a solution and so if it was washed prior to this it
would have droplets that would add to this volume.i.e you have a
volume greater than that measured out.
