There are plethora of sources of errors to occur in due course of titration. Potassium permanganate solutions are not stable and they should be filtered and normalized every 2-3 months. It can be either of end point error, misreading volumes, concentrations, faulty … According to Purdue University, "A titration is a technique where a solution of known concentration is used to determine the concentration of an unknown solution." It should also be apparent that the titrations involving iodine must be made in cold solutions in order to minimize Sources of error/uncertainties: If the tablet is squashed into powder some of it stays in the paper or the powder may also stick to the walls of the beaker when poured. Problems can also arise in the sampling process. There are a large number of sources of errors occurring in time of calibration. This can be minimized by having a large excess of iodide in order to keep the iodine tied up as tri-iodide ion. There are plethora of sources of errors to occur in due course of titration. Choosing the right indicator. NaOH is a base which can vary the results because it is hydroscopic, not using a hydroscopic base … The solution of the known concentration is introduced into a specific volume of the unknown through a burette or pipette. Titration: A titration is a volumetric analytical technique used to measure the amount of volume added to an unknown sample. SOURCE : Titration, as you already know, is a very precise procedure in measuring the volume of liquids. However, since it is so sensitive and accurate a lot can occur throughout the procedure to give erroneous results. It can be either wrong endpoint, wrong reading sizes, concentrations, faulty use of equipment, contaminated glass panels, etc. 1.) Sampling Errors. To get the most accurate results, chemists must either take samples from a large population size or obtain multiple samples from the population size selected. I’m sure you’ve learned at some point that the pH value of the titration endpoint depends on the acid dissociation constant (K a) of the acid and base that are used.If a strong base is titrated by a strong acid, the pH value at the endpoint is around 7. Several factors can cause errors in calibration results, including misreading volumes, faulty concentration values, or a wrong technique. One of the most common sources of errors is contaminated glassware (pipette, burett). balance used in a titration experiment are technically sources of systematic error, these errors are easily avoided. The calibration of the balances is periodically checked using a registered Several factors can cause errors in titration findings, including misreading volumes, mistaken concentration values or faulty technique. Loss of iodine by evaporation from the solution. Apart from general sources of titration errors, when titrating hydrogen peroxide we should pay special attention to titrant. 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