The Volumetric Flask Volumetric Flask Weigh out a specific mass of anhydrous sodium carbonate on a clean dry clock glass accurate to 001g Add the solute to a beaker containing a small volume of ID: 638299
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Slide1
Volumetric Analysis
ApparatusSlide2
The Volumetric FlaskSlide3
Volumetric Flask
Weigh out a specific mass of
anhydrous sodium carbonate on a clean, dry clock
glass accurate to 0.01g.Add the solute to a beaker
containing a small volume of
deionised water.
Using a
wash bottle
wash all
traces
of the solute from the clock glass into the beaker.Stir with clean glass rod to dissolve
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. add deionised water until the level is 1 cm below the gradation mark.
Using a dropper fill the rest of the volumetric flaskuntil the bottom of the meniscus is on the mark.Slide4
Volumetric Analysis
Stopper
the flask and
invert about 30 times.
This ensures the mixture is
homogenous
.Slide5
The Pipette
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
above the graduation mark and then allow to empty till at
bottom of the meniscus
.
Allow to empty with
gravity,to
remove adhering drop touch off side of glass. Dont blow: its calibrated for thisSlide6
The BuretteSlide7
The Burette
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
and so the meniscus
is on the bottom of the graduation markSlide8
Conical FlaskSlide9
Conical Flask
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
Can rinse with deionised water during titration because no effect on number of moles in flask
Place over coloured tile to help see colour change