Which step is NOT part of performing a titration?

Filling the burette with the analyte is indeed not a step taken during a titration procedure. In a typical titration, the burette is filled with the titrant, which is the solution of known concentration that is gradually added to the analyte solution of unknown concentration in a controlled manner. The analyte is usually placed in a different container, such as an Erlenmeyer flask or a beaker.

The process typically involves adding an indicator to the analyte solution so that a color change can signal the endpoint of the titration. The preparation of the titrant is also essential, as it is important to know the exact concentration of the titrant to obtain accurate results. Slowly adding the titrant to the analyte while observing for the endpoint, indicated by a color change, helps in determining the volume of titrant required to completely react with the analyte.

Therefore, filling the burette with the analyte instead of the titrant goes against standard titration practices.