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Assembly
Assembly
Check to make sure the ring stand is secure and does not wobble.
Lower the buret clamp onto the ring stand and tighten the screw to secure it in place.
Place the buret into the buret clamp.
Ring stand
Ring stand with buret clamp secured
Buret secured to clamp
Check the buret
Check the buret
Use about 20 mL of distilled water to check that your buret is functioning properly. Drain into a waste beaker.
Make sure that the stopcock is fully inserted into the glass buret and the buret is not leaking from the stopcock joint.
Incorrect: stopcock partially inserted into buret barrel
Correct: stopcock fully inserted into buret barrel
Make sure the liquid flows freely out of the buret when the stopcock is open. If not, you may have a bubble trapped in the valve.
To remove air bubbles from the buret tip, open the stopcock fully to rapidly drain several millimeters of the liquid into a waste beaker.
Removing air bubbles from a buret tip
Rinse the buret
Rinse the buret
Dispense about 50 mL of your dilute HCl solution into a clean, dry beaker.
Rinse your buret twice with ~5 mL of the dilute HCl solution each time.
Rinsing involves wetting the sides of the buret with the dilute HCl and then draining the HCl into a waste beaker.
Rinsing the buret
Fill the buret
Fill the buret
Clamp the buret into place vertically. Make sure the stopcock is closed.
Use a funnel to pour the dilute HCl solution into the buret until the liquid level is above the 0 mL mark at the top.
Remove the funnel and place the beaker below the buret – you will be reusing the HCl from the setup, so make sure you do not contaminate it.
Fill the buret tip by opening the stopcock and draining some HCl into the beaker. Make sure there are no bubbles remaining in the tip and practice controlling the flow rate by adjusting the stopcock.
Close the stopcock and wipe off the tip of the buret with a Kimwipe.
Pour the HCl from the beaker back into the buret.
Fill the buret to the top, to some point between 0.00 and 1.00 mL.
Record the initial volume to the nearest 0.01 mL in your lab notebook. Burets and can should be to two decimal places.
Filling a buret
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