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Mercuric iodide is added to starch indicator preparation to enhance its sensitivity and specificity in detecting the presence of iodine. Mercuric iodide forms a complex with iodine, which results in a more distinct color change when iodine is present in the solution being tested. This makes it easier to visually determine the endpoint of a titration or the presence of iodine in a sample. Additionally, mercuric iodide helps stabilize the indicator solution, prolonging its shelf life and maintaining its effectiveness over time.

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ProfBot

7mo ago

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For what purpose you use starch-iodine indicator paper?

it is used to indicate acidic radicals which reacts with the iodide solution.


Is starch redox indicator?

Starch is a complexometric indicator.


What is the difference between starch solution and iodine solution?

Starch is composed of amylose and amylopectin, and is not soluble in water due to the presence of amylopectinIodine (I₂) is somewhat soluble in water, but is more soluble in iodide (I⁻) solutions, such as potassium iodide solution (KI).Aqueous iodine molecules (I₂) and iodide ions (I⁻) together will form triiodide ions (I₃⁻), which can react with amylose found in starch to produce a deep-blue colour in the solution. So all of iodide (I⁻), iodine (I₂) and amylose (or starch) are required together to produce the colour.This can be used to test for:Amylose/Starch: Add iodine dissolved in potassium iodide solution to test solution, orIodine: Add starch and potassium iodide solutions to test solution.If the substance being tested for is present, then triiodide ions (I₃⁻) can react with amylose (in starch) to produce a deep-blue colour, that is, a positive result.


What chemical indicator do you use for starch?

Starch is not the indicator. Iodine is the indicator of starch.


Why chlorine turns moist starch iodide paper blue?

Chlorine gas reacts with the potassium iodide in the moist starch iodide paper to produce potassium chloride and iodine. The iodine then reacts with the starch in the paper to form a blue complex. This color change is used as a test for the presence of chlorine gas.


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


What color change does starch indicator solution make in the absence of starch?

Starch indicator solution will remain its original color (usually colorless) in the absence of starch. Without starch present, there will be no color change observed when using starch indicator solution.


Which gas turns moist starch iodide paper blue black?

Chlorine gas turns moist starch iodide paper blue-black.


What is the role of the indicator?

indicator help us find out find out which molecules diffused and which didn't.... for example: starch indicator indicate starch......and.......glucose indicator indicate glucose.


Preparation of modified tapioca starch using glycerol?

preparation of modified tapioca starch using glycerol?


What is an indicator for starch and the reaction is?

Iodine is an indicator for starch. The reaction between iodine and starch causes a color change from brown/orange to blue/black.


What happens when you mix silver nitrate with a starch and water solution?

When silver nitrate is mixed with a starch and water solution, a complex forms known as the silver-starch complex. This results in a blue-black coloration, which can be used as a chemical indicator for the presence of iodide ions in the solution.