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www.reference.com/science/iodine-react-starch-66892d08fbad708e

Why Does Iodine React With Starch? When iodine and starch interact, iodine molecules become arranged within the starch molecules in a linear fashion. The visible end result of this arrangement is the appearance of a blue-black coloration.

www.chemistryviews.org/details/education/10128441/Why_Does_Iodine_Turn_Starch...

Iodine Test. Using iodine to test for the presence of starch is a common experiment. A solution of iodine (I 2) and potassium iodide (KI) in water has a light orange-brown color.If it is added to a sample that contains starch, such as the bread pictured above, the color changes to a deep blue.

answersdrive.com/how-does-iodine-react-with-starch-7301496

Why does lugol iodine react with starch? Lugol's Iodine (IKI) test for the presence of starch: Iodine dissolved in an aqueous solution of potassium iodide - reacts with starch producing a deep blue-black color. This reaction is the result of the formation of polyiodide chains from the reaction of starch and iodine.

melscience.com/US-en/articles/impact-iodine-starch

The result of reaction between starch and iodine solution [Wikimedia] Let’s see how the re­ac­tion of starch and io­dine can be use­ful in dai­ly life. It’s sim­ple: if you have two un­la­beled con­tain­ers of soda and starch at home, and you don’t want to work out which one is which by tast­ing them, add a drop of io­dine. ...

en.wikipedia.org/wiki/Iodine_test

The iodine test is used to test for the presence of starch.Starch turns into an intense "blue-black" colour upon addition of aqueous solutions of the triiodide anion, due to the formation of an intermolecular charge-transfer complex.In the absence of starch, the brown colour of the aqueous solution remains.

answersdrive.com/why-does-lugol-iodine-react-with-starch-7301499

Why does lugol iodine react with starch? Lugol's Iodine (IKI) test for the presence of starch: Iodine dissolved in an aqueous solution of potassium iodide - reacts with starch producing a deep blue-black color. This reaction is the result of the formation of polyiodide chains from the reaction of starch and iodine.

www.answers.com/Q/Why_does_starch_react_with_iodine_solution

Why does starch react with iodine solution? Iodine (a halogen) forms a starch-iodine complex by binding with amylose coils, which results in a transfer of charge between amylose and iodine ...

www.reference.com/science/iodine-turn-starch-blue-70931cf7c358f2e2

Amylose molecules are made up of single strands of glucose molecules shaped like springs. When iodine is added to a starch, it adheres to the beta amylose molecules because of their solubility. The starch pushes the iodine into a line in the middle of the amylose coils and creates a transfer of charge between the iodine and starch.

chemistry.elmhurst.edu/vchembook/548starchiodine.html

Starch amylopectin does not give the color, nor does cellulose, nor do disaccharides such as sucrose in sugar. Iodine Test: When following the changes in some inorganic oxidation reduction reactions, iodine may be used as an indicator to follow the changes of iodide ion and iodine element. Soluble starch solution is added.

chem.libretexts.org/.../Carbohydrates/Case_Studies/Starch_and_Iodine

Starch amylopectin does not give the color, nor does cellulose, nor do disaccharides such as sucrose in sugar. Iodine Test: When following the changes in some inorganic oxidation reduction reactions, iodine may be used as an indicator to follow the changes of iodide ion and iodine element. Soluble starch solution is added.