I am not quite sure what happens when corn starch and iodine are mixed but when corn starch, iodine and water are mixed, it creates a purple solution. The darkness of the colour mostly depends on the iodine. Without the starch with iodine and water, it is deep yellow or brown.
the iodine molocules diffuse into the bag!!
Corn starch, iodine and water.
If iodine enters the bag containing starch, the contents of the bag will turn blue, purple, or black.
Iodine is permeable to a plastic bag because the starch's molecules are too large to pass through the bag (starch is a complex sugar made of a large chain of monosaccharides), while the Iodine can pass through since iodine is usually only two Iodine atoms (I2).
Presence of starch.
Flour and corn starch are measured the same, but the results aren't always the same.
corn starch
Starch has high affinity for Iodine and in presence of iodine crystals starch turns blue from being colourless. This the fundamental that is used for chemically identifying the starch.
Iodine salts haven't starch.
co2 ho2o2 ar,he,kr,ne+cloramphinamine
¿Qué pasa con almidón después de poner en yodo?
Starch is not the indicator. Iodine is the indicator of starch.
if you put iodine in food and it contains starch it should change color.