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Why come again colour change after endpoint of titration of sodium thiosulphate with iodine?
The color change occurs because iodine reacts with starch to form a blue-black complex. Initially, the iodine reacts with the sodium thiosulfate until it is completely consumed, resulting in a color change from yellow to brown. Once the sodium thiosulfate is depleted, any excess iodine present reacts with the starch indicator, causing the solution to turn blue-black, indicating the endpoint of the titration.
What else can I help you with?
What changes color at the endpoint of titration?
The color change at the endpoint of titration is usually due to an indicator that has been added to the solution being titrated. The change in color indicates that the reaction is complete and can help determine the endpoint of the titration.
Changes color at the endpoint of a titration?
yes,its true that colour changes at the endpoint of titration but in some cases coloured solution become colourless.it indicate end of a reaction in which one substance has been fully used up.indicators are used to locate the endpoint but in certain cases reactant or product itself is coloured which at endpoint become colourless or coloured.
Why is a white tile used in an acid - base titration?
A white tile is used in an acid-base titration to provide a clear background against which to observe the color change of the indicator in the solution being titrated. The white surface helps enhance the visibility of the color change, allowing the endpoint of the titration to be detected more accurately.
What colour changes you see in edta titration?
In EDTA titration, the color changes typically involve a transition metal complex forming with EDTA. For example, in the titration of calcium ions, a color change from red to blue indicates the formation of a complex between EDTA and calcium ions. This color change signals the endpoint of the titration.
In permanganometric titration what is the the self indicator and how does it work?
In permanganometric titration, the self-indicator is the permanganate ion itself. It works by changing color during the titration process from purple to colorless when the endpoint is reached. This color change indicates the completion of the reaction between permanganate ion and the analyte.
What changes color at the endpoint of titration?
The color change at the endpoint of titration is usually due to an indicator that has been added to the solution being titrated. The change in color indicates that the reaction is complete and can help determine the endpoint of the titration.
Changes color at the endpoint of a titration?
yes,its true that colour changes at the endpoint of titration but in some cases coloured solution become colourless.it indicate end of a reaction in which one substance has been fully used up.indicators are used to locate the endpoint but in certain cases reactant or product itself is coloured which at endpoint become colourless or coloured.
Why is a white tile used in an acid - base titration?
A white tile is used in an acid-base titration to provide a clear background against which to observe the color change of the indicator in the solution being titrated. The white surface helps enhance the visibility of the color change, allowing the endpoint of the titration to be detected more accurately.
What colour changes you see in edta titration?
In EDTA titration, the color changes typically involve a transition metal complex forming with EDTA. For example, in the titration of calcium ions, a color change from red to blue indicates the formation of a complex between EDTA and calcium ions. This color change signals the endpoint of the titration.
In permanganometric titration what is the the self indicator and how does it work?
In permanganometric titration, the self-indicator is the permanganate ion itself. It works by changing color during the titration process from purple to colorless when the endpoint is reached. This color change indicates the completion of the reaction between permanganate ion and the analyte.
Advantages of conductometric titration over volumetric method?
Conductometric titration is advantageous over volumetric titration as it does not require a colour change indicator, making it suitable for titrating solutions that are not easily detectable by color change. It also allows for the detection of the endpoint precisely by monitoring the conductivity change in the solution, resulting in a more accurate determination of the equivalence point. Additionally, conductometric titration can be used to analyze non-aqueous solutions and solutions with low concentrations.
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.
The purpose of an indicator in a titration experiment?
The indicator is used to measure the end point of titration. Methyl red and phenolphthalein are frequently used indicators in acid-base titration. Potassium permanganate can used as a self indicator in redox titrations where applicable.
How to calculated NaOH concentration be affected if the colour change in the solution is too dark?
I presume you are titrating a standardized solution of (eg) HCl with NaOH to determine the molarity of the alkali. You would normally use an indicator which will change colour at the end point (eg colourless to pink for phenolphthalein). If the solution is very coloured to begin with it can mask the colour change and so make the end point hard to see and lead to a miscalculation of molarity.
What is the colour change in the titration of NaOH and C2H2O4 if using phenolphthalein as an indicator?
In the titration of NaOH and C2H2O4 using phenolphthalein, the colour change will occur at the endpoint when the solution transitions from pink to colourless. Phenolphthalein is pink in basic solutions and colourless in acidic solutions, so once all the oxalic acid is neutralized by the sodium hydroxide, the solution will turn colourless.
Why do you use starch to standardise sodium thiosulphate using potassium iodate?
Starch acts as an indicator for the endpoint of the reaction between sodium thiosulphate and potassium iodate, as it forms a blue-black complex with iodine. This color change helps identify when all the iodine has been liberated from the reaction. This method is commonly used in titrations to determine the concentration of the sodium thiosulphate solution accurately.
Why is EBT indicator used for EDTA complexometric titration in determining water hardness?
The Eriochrome Black T (EBT) indicator changes color when it forms a complex with calcium and magnesium ions, which are responsible for water hardness. This color change signals the endpoint of the titration when all the calcium and magnesium ions are complexed with EDTA. Therefore, EBT is used to detect the endpoint of the titration and determine the water hardness.
