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Titrations

Titrations. The Proper Use Of A Buret. Obtain a buret clamp. Open the clamps and insert the buret. Position the buret assembly over the center of the hotplate. Attach the buret clamp to ring stand. Assemble the Ring Stand and Buret Clamp. Make sure the valve is OFF!.

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Titrations

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  1. Titrations The Proper Use Of A Buret

  2. Obtain a buret clamp. Open the clamps and insert the buret. Position the buret assembly over the center of the hotplate. Attach the buret clamp to ring stand. Assemble the Ring Stand and Buret Clamp

  3. Make sure the valve is OFF! Place CLEAN funnel in top of buret. Carefully add the titrant. Fill the Buret (NaOH) Go Slow! Don’t overfill! Remove funnel when finished.

  4. Drain The Buret Inspect the buret tip for bubbles. Ready to go!No bubbles in tip. Open the valve.... ...and let a small amount of liquid run into a waste beaker. Drain the buret again to eliminate bubbles.

  5. 2.00 mL 2.50 mL 2.60 mL 2.68 mL 2.70 mL 3.00 mL Record Initial Volume ALL BURET MEASUREMENTS MUST INCLUDE 2 DECIMAL DIGITS!!!!

  6. Carefully pour liquid into flask. Add the stir bar.Don’t splash! Add the indicator. Add Liquid to Flask

  7. Flask in center of hotplate. Faint color change that quickly vanishes. Stir (2 or 3) HEAT TURNED OFF! Stir and Titrate

  8. Don’t miss! Partial drop clings to buret tip. Use distilled H2O to rinse drop into flask. Close to the Endpoint?Add only a little!

  9. Too dark...you’ve gone too far! Faint persistent color change....just right! The End of the Titration:Endpoint

  10. 13.00 mL 13.50 mL 13.80 mL 13.88 mL 13.90 mL 14.00 mL Final Reading ALL BURET MEASUREMENTS MUST INCLUDE 2 DECIMAL DIGITS!!!!

  11. Vfinal Vinitial Calculate the dispensed volume. 13.88 mL - 2.68 mL 11.20 mL 11.2 mL 2 Decimal Digits!!

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