Exempel på conical flask

• The cut stems were placed in a conical flask filled with water and sealed around the base of the stem using cotton wool and parafilm.

• This was to prevent the thrips and predators moving into the conical flask.

• The known solution should then be allowed out of the burette, into the conical flask.

• Secondly, a known volume of the unknown concentration solution should be taken with the pipette and placed into the conical flask, along with a small amount of the indicator chosen.

• First, the burette should be rinsed with the standard solution, the pipette with the unknown solution, and the conical flask with distilled water.