Why is it important to mark the solvent level on the chromatography paper as soon as you remove it from the petri dish?

Explanation:

The importance of marking the solvent level on the chromatography is -

Since ,

the solvents are volatile in nature and if they are not marked immediately , the solvent can get evaporated , and the exact level of the solvent would be lost , and hence ,

it will give an inaccurate data of the experiment .

a saline water is fed to a reverse osmosis unit at flow rate o rotameter connected to reject (retentate) line reads 8 installed in reject and permeate line reads 15.2 milli siemens/cm and 300 micro siemens/com respectively.

answersilicon (si); oxygen (o);