Table of Contents
Why should the funnel be removed in titration?
The glassware used in undertaking titration readings and values has a high chance of causing errors in the final calculations. The chemical leftover majorly causes the errors on the vessels, which are not accounted for during the calculations.
Why we need to shake the apparatus in titration?
In effect you are only measuring the quantity in your sample that reacts below the burette tip. By stirring and continuing to titrate until the color change persists you have made the reagent react with all of the material in your sample and can now determine how much is in your sample.
What is the correct way to handle a burette and an Erlenmeyer flask during a titration?
Fill the Erlenmeyer flask with the required amount of the analyte solution and make sure to add indicator. Adding indicator is the only way to visibly see whether you reached the end point or not. Place the Erlenmeyer flask under the tip of the buret.
What is the purpose of carrying out the titration more than once?
A titration is repeated at least three times in order to provide a statistically valid answer.
How you can get the most accurate reading in titration?
A pH electrode should be calibrated each day (at least once) it is used to get the most accurate reading. A two-point method is typically sufficient, as long as the appropriate buffers are used.
What are the possible causes of error in titration?
Several factors can cause errors in titration findings, including misreading volumes, mistaken concentration values or faulty technique. 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.
What happens if you do not shake solution properly?
Therefore, no-shaking the device containing suspensions, the components of the formulation are not adequately mixed, resulting in sedimentation and/or flocculation phenomena.
Why is titration not accurate?
What should not be left in the burette during titration?
react with substances left from a previous titration. This would lead to the concentration of the substance being lowered and a larger titre being delivered. Don’t leave the funnel in the burette because small drops of liquid may fall from the funnel during the titration leading to a false burette reading (would give a lower titre volume)
Why is my titration reading higher than expected?
make sure the jet spacein the buretteis filledwith the solution and air bubbles are removed. If the jet space in the burette is not filled properly prior to commencing the titration it will lead to errors if it then fills during the titration, leading to a larger than expected titre reading.
Why is titration used in neutralisation reactions?
As many of you might well recall, this is known as a neutralisation reaction. Titration allows us to work out the concentration of, for example, an acid of unknown concentration, by using a fixed volume of it and measuring how much of an alkaline solution of known concentration is needed to react with all of it.
Why can’t you leave the funnel in the burette?
Don’t leave the funnel in theburette because small dropsof liquid may fall from the funnel during the titrationleading to a false burette reading (would give a lower titrevolume) make sure the jet spacein the buretteis filledwiththesolution and air bubbles are removed.