Why is it necessary to pre-rinse volumetric glassware with the solution to be measured? Would it matter if droplets of distilled water were left in the burette when it was filled with sodium hydroxide?explain
It is necessary to pre-rinse volumetric glassware with the solution to be measured in order to remove any trace of contaminants or residues that may be present in the glassware. If the glassware is not properly rinsed, these contaminants can affect the accuracy of the measurements and potentially lead to inaccurate results.
If droplets of distilled water were left in the burette when it was filled with sodium hydroxide, it could affect the concentration of the sodium hydroxide solution. This is because the presence of water droplets could dilute the sodium hydroxide solution, leading to a lower concentration than intended. This could again result in inaccurate measurements and potentially affect the outcome of the experiment or analysis being performed.