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When Iodine (when dissolved in an aqueous solution of potassium iodide) reacts with "starch" it makes a purple black color. Basically when "starch" and iodide ions interact, they form a biger, thicker polyiodide chain. Specifically they do this with a polysaccharide called amylose. Amylose is a "straight chain" portion of starch and changes its structure to forms helices where iodine molecules come together. This change forms a dark purple color. Amylose is a polysaccharide (a complicated long sugar molecule) and is one of the two components of starch, making up about 20-30% of the starch in say, a potato. The iodide ion (an element with an electrical charge) inserts itself inside of the amylose coil structure and changes how the molecule absorbs light. And this has something to do with the charge transfer complex.
What else can I help you with?
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lunapic.com or picnik.com
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i dont know buster
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