Potassium permanganate solutions are not stable and they should be filtered and normalized every 2-3 months. sources of errors. There are a large number of sources of errors occurring in time of calibration. The calibration of the balances is periodically checked using a registered There are plethora of sources of errors to occur in due course of titration. Sampling Errors. 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." One of the most common sources of errors is contaminated glassware (pipette, burett). Choosing the right indicator. 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. This can be minimized by having a large excess of iodide in order to keep the iodine tied up as tri-iodide ion. Care must be taken as the solution of the known concentration is introduced into a specific volume of the unknown through laboratory glassware such as a burette or pipette. 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. It can be either of end point error, misreading volumes, concentrations, faulty use of equipment, contaminated glass ware, etc. NaOH is a base which can vary the results because it is hydroscopic, not using a hydroscopic base … Problems can also arise in the sampling process. 1.) Several factors can cause errors in calibration results, including misreading volumes, faulty concentration values, or a wrong technique. There are plethora of sources of errors to occur in due course of titration. It should also be apparent that the titrations involving iodine must be made in cold solutions in order to minimize Sources of errors in titration Titration is a quite sensitive analytical method that lets us determine an unknown concentration of a chemical in solution by introducing a known concentration of another chemical. However, since it is so sensitive and accurate a lot can occur throughout the procedure to give erroneous results. balance used in a titration experiment are technically sources of systematic error, these errors are easily avoided. Several factors can cause errors in titration findings, including misreading volumes, mistaken concentration values or faulty technique. 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