0
Because starch forms a dark blue colored soluble product with free iodine, so that the appearance of color in the solution from this reaction effectively shows when all the substances in the solution that react more strongly with iodine than does starch have been consumed and the titration is finished.
What else can I help you with?
Why do you need freshly prepared starch solution for iodometric titration?
because,starch undergoes a photochemical reaction. So, with the passage of time it can under go to the photochemical reaction and starch wouldnot be starch but it might have changed in anyother product. so...we should use freshly prepared starch.
Why you do not use H2SO4 in iodometric titration?
Using H2SO4 in iodometric titration can lead to the formation of H2O2, which interferes with the reaction. It can also oxidize iodide ions prematurely, affecting the accuracy of the titration. Therefore, a different acid like HCl is typically used in iodometric titration.
Why use sodium bicarbonate in iodometric titration?
Sodium bicarbonate is used in iodometric titration to react with excess iodine that may be present after the reaction with the analyte. This helps neutralize the solution and prevent any further reactions that could interfere with the titration endpoint. Additionally, sodium bicarbonate helps stabilize the pH of the solution during the titration process.
Why you use iodine in iodometric titration?
Iodine is used in iodometric titration as the titrant because it can easily react with reducing agents to form iodide ions. Its reaction with reducing agents leads to a change in color, making it useful for visual endpoint detection. This allows for the determination of the concentration of the reducing agent being analyzed in the titration process.
What chemical indicator do you use for starch?
Starch is not the indicator. Iodine is the indicator of starch.
Why do you need freshly prepared starch solution for iodometric titration?
because,starch undergoes a photochemical reaction. So, with the passage of time it can under go to the photochemical reaction and starch wouldnot be starch but it might have changed in anyother product. so...we should use freshly prepared starch.
Why you do not use H2SO4 in iodometric titration?
Using H2SO4 in iodometric titration can lead to the formation of H2O2, which interferes with the reaction. It can also oxidize iodide ions prematurely, affecting the accuracy of the titration. Therefore, a different acid like HCl is typically used in iodometric titration.
Why use sodium bicarbonate in iodometric titration?
Sodium bicarbonate is used in iodometric titration to react with excess iodine that may be present after the reaction with the analyte. This helps neutralize the solution and prevent any further reactions that could interfere with the titration endpoint. Additionally, sodium bicarbonate helps stabilize the pH of the solution during the titration process.
Why you use iodine in iodometric titration?
Iodine is used in iodometric titration as the titrant because it can easily react with reducing agents to form iodide ions. Its reaction with reducing agents leads to a change in color, making it useful for visual endpoint detection. This allows for the determination of the concentration of the reducing agent being analyzed in the titration process.
What chemical indicator do you use for starch?
Starch is not the indicator. Iodine is the indicator of starch.
What is double indicator titration?
Double indicator titration is a type of titration method that involves the use of two different indicators to determine the endpoint of the reaction. The first indicator changes color near the starting pH of the titration, while the second indicator undergoes a distinct color change at or near the endpoint of the titration. This technique is commonly used in complexometric titrations to determine the concentrations of metal ions in a solution.
Why use NaHCO3 for iodometric titration?
Sodium bicarbonate (NaHCO3) is used in iodometric titration as a reaction enhancer to neutralize excess acids that may interfere with the redox reaction between iodine and the analyte being titrated. By maintaining a slightly basic pH, NaHCO3 helps stabilize the iodine solution, ensuring more accurate and reliable results.
How do you overcome the disadvantages of starch indicator?
All the alpha amylase molecules should rupture . Boil water and then add to the boiling water required starch. Make sure that the starch is alpha and not beta amylase. Use freshly prepared starch solution for iodometric titrations. --unnikrishnan
How much phenolphthalein indicator should be used?
Typically, 1-2 drops of phenolphthalein indicator are sufficient to use in an acid-base titration experiment. It is important not to use too much indicator, as it can affect the accuracy of the titration results.
What color does the indicator turn when starch is present?
Iodine is used to indicate whether starch is present in a solution. If starch IS present, the indicator will turn dark blue/black. Iodine is used to indicate whether starch is present in a solution. If starch IS present, the indicator will turn dark blue/black. FOR WHAT PURPOSE WE USE STARCH-IODINE INDICATOR PAPER
Why in titration of kmno4 no indicator is used?
In the titration of KMnO4, no indicator is used because KMnO4 is a self-indicating titrant. It undergoes a color change from purple to colorless (or brown) at the endpoint of the titration, which makes it unnecessary to add an external indicator. The precise endpoint can be easily detected visually, making the use of an indicator redundant.
What is Fajan's method of argentometric titration?
Fajan's method of argentometric titration involves the use of potassium chromate as an indicator to detect the end point of a titration between silver ions and chloride ions. The indicator changes color from yellow to red when all the chloride ions have reacted with the silver ions, marking the end point of the titration.
