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DESCRIPTIONVolumetric Analysis. Apparatus. The Volumetric Flask. 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. - PowerPoint PPT Presentation
The Volumetric Flask
Volumetric FlaskWeigh 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.
Volumetric AnalysisStopper the flask and invert about 30 times.
This ensures the mixture is homogenous.
The PipetteRinse 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 this
The BuretteRinse 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 mark
Conical FlaskIts 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 flaskPlace over coloured tile to help see colour change