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The endpoint determination is the most common systematic error. The titration error is the difference between the equivalency point and the measured end point. Because the colour change must be seen by eye, a visual end point is always little beyond the equivalence point.

• Titrating a known concentration of titrant into a solvent without any traces of analyte is known as blank titration.
• This is a very useful feature to add in the early procedures of the study in order to identify potential sources of mistake if the result fluctuates.
• Blank titration can also be used to confirm that your solvent is free of any foreign chemicals before doing the main experiment.
• This way, you can avoid having to repeat your analysis.

By guaranteeing that there are no other compounds interfering with the solvent, blank titration decreases titration error.

This is done by titrating the standardised titrant against the solvent without any analyte present.