Question

Describe the steps followed when a pipet is used to measure a sample of liquid.?

Describe the steps followed when a buret is used to measure a sample of liquid?

Answer 1

Q1.

a pipet:

1) ensure pipet is CLEAN and has no marks/mateiral inside

2) Get a dry beaker; in which the solutoin will be poured, ensure it is dry and clear

3) With the pipet; get it into solution.

4) Squizz it so it will create vacuum when released

4) insert pipet down up to 1/4 inches of the solutoin required

5) release squiz, then some volume will go

6) Ensure mark is the volume you need

7) change pipet to the desired beaker

8) Squiz so fluis goes out.

9) Ensure all volume has been released

10) Clean pipet after use

Q2.

For burete:

1) Ensure buret is celan and DRY, recall that volume of himidity/dorps can account for erros

2) Get solution in a dry clean beaker

3) Place Buret in the stand (ensure clamps)

4) ensure it is 100% vertical, and buret is not diagonal

5) Before pouring any liquid, ensure it is CLOSED

6) add solutoin to buret, up to "initial volume"

7) Read "initial volume" --> the lowest point of the meniscus is our volume

8) Dispence the voluem via the throttle

9) Close until final volume is released

10) Read "final volume" the lowest point of the meniscus is our volume

11) After this, get your beaker of solution

12) Throw/get rid of the solution inside the buret; properly according to your lab practices

13) Rinse the buret so it releases all material

14) Place burent in safe place

15) Calcualte Volume = Vinitial - Vfinal