13
Volumetric Analysis Apparatus

Volumetric Analysis Apparatus. The Volumetric Flask

Embed Size (px)

Citation preview

Page 1: Volumetric Analysis Apparatus. The Volumetric Flask

Volumetric Analysis

Apparatus

Page 2: Volumetric Analysis Apparatus. The Volumetric Flask

The Volumetric Flask

Page 3: Volumetric Analysis Apparatus. The Volumetric Flask

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.

Page 4: Volumetric Analysis Apparatus. The Volumetric Flask

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.

Page 5: Volumetric Analysis Apparatus. The Volumetric Flask

Volumetric Analysis• Using a dropper fill the

rest of the volumetric flask

until the bottom of the

meniscus is on the mark.

Page 6: Volumetric Analysis Apparatus. The Volumetric Flask

Volumetric Analysis• Stopper the flask and invert about 30 times.

• This ensures the mixture is homogenous.

Page 7: Volumetric Analysis Apparatus. The Volumetric Flask

The Pipette

Page 8: Volumetric Analysis Apparatus. The Volumetric Flask

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 to above the mark.

• Allow the liquid to run into a waste beaker until the bottom of the meniscus is on the mark.

Page 9: Volumetric Analysis Apparatus. The Volumetric Flask

• 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

Page 10: Volumetric Analysis Apparatus. The Volumetric Flask

The Burette

Page 11: Volumetric Analysis Apparatus. The Volumetric Flask

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.

• Re-fill the burette until the bottom of the meniscus is on the mark.

Page 12: Volumetric Analysis Apparatus. The Volumetric Flask

Conical Flask

Page 13: Volumetric Analysis Apparatus. The Volumetric Flask

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.

• 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.