preview

How To Fill A Pipette

Decent Essays
Open Document

4. Fill the pipette 5ml of 0.02 molL-1 NaCl using the pipette filler and repeat step 3, so that 0.02 molL-1 NaCl touches all the sides. Discard the NaCl. 5. Repeat step 4, two more times 6. Now rinse the funnel with deionised water. 7. Using the funnel pour the deionised water into the burette up to the halfway mark, don’t forget to turn off the tap. 8. Rinse the burette in the same manner as the pipette; hold it horizontally and rotate, so that the water makes contact with all the side. Then let the water out by opening the tap. If there are any bubbles in the tap, lightly tap on its side when it’s open to get rid of the bubbles. 9. Rinse the tip with some deionised water. 10. Shake the container of AgNO3 and using the funnel pour approximately …show more content…

Now rinse the conical flask thrice with deionised water by pumping the water around neck of the flask and swirling it. Then tip out the waste. 13. Now pipette exactly 10ml of 0.02 molL-1 NaCl into the conical flask; the bottom of the meniscus must be at the 10ml mark, when looked at eye level. Make sure that there are no air bubbles in the middle. If there are any pipette the solution out and redraw it again. 14. Rinse the dropper with some deionised water and discard the water. 15. Now exactly get 3ml of 0.1 molL-1 K2CrO4 with a dropper and then add it to the conical with 0.02 molL-1 NaCl. Swirl to mix the contents 16. Wash down any NaCl and K2CrO4 on the sides of the conical flask with some deionised, to get all the added solutions into the middle. 17. Shake the AgNO3 container and add 25ml of AgNO3, into the burette using the funnel. 18. Now open the tap and adjust the volume exactly up to the 30ml mark; the bottom of the meniscus is at 30ml when looked at eye level. If there are any bubbles in the tap, make sure to get them out by opening the tap and lightly tapping on its side to get rid of them. Collect this AgNO3 in the container holding the AgNO3. If the volume goes below 30ml in this process add more AgNO3, to get it 20ml. 19. Set the equipment up as shown in the

Get Access