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Titration forms a basis in most chemical analyses as a technique that assists in establishing the concentration levels of a particular soluble subcomponent. It is extensively utilized in labs, although it can yield unsatisfactory results quite frequently. Even well versed professionals may face mistakes that compromise the accuracy of their execution.
One of the most common errors made during titration is the titrant or analyte solutions being formulated incorrectly. Irrespective of whether it was the concentration that was incorrectly determined, whether or not the substance used was impure or even if there could have been any form of contamination, all these mistakes are bound to distort the findings.
Also read:Common Titration Errors to Avoid and How to Correct Them
The relevant detecting endpoint of the titration stage is very critical. Some of the reasons that can lead to failure to obtain good results include failure to alter the expected color range in completion, excessive completing of the sample and simply, failure to determine the endpoint in its entirety. This problem is common with most people who tend to determine the end points of sample testing visually by the use of visible indicators such as phenolphthalein.
The burette is a crucial piece of equipment in titration and any mistakes made in its operation could add serious problems such as unsteady flow as well as tiny bubbles that are formed in the titrant thus causing the titrant volume to distort.
Addition of the titrant onto the solution without fully mixing it uniformly will cause an asymmetrical reaction to happen thus extending the endpoint target which will then impact the result.
In practical work involving titration, temperature is also a factor that can affect the result of the titration, especially in the heat sensitive reactions. It should be remembered that there is no constant result if temperature changes are not accounted as reaction rates are temperature dependent.
Titration is one of the most accurate and precise analytical strategies that needs to be executed with utmost caution, however, by avoiding some of the most general mistakes can greatly help in the accuracy of the results of your experiment. It is possible to minimize the error of your titrations significantly by ensuring proper solution preparation, better endpoint detection and more accurate use of the burette while also ensuring adequate closure to mixing operations and controlling for temperature variations. You need to stick with these instructions in your next analysis procedure and you will be in perfect position to perform any type of analysis and achieve correct and reproducible results.