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Pure iodine is violet. It can act as an electron acceptor (an acid/ oxidizer <-- because it is taking negative charges (aka electrons) from something, leaving that something with an overall positive charge). When iodine is in a solvent that doesn't donate electrons it stays violet. When it is in water or ethanol the iodine accepts electrons from the oxygen atom which then affects the wavelength of visible light that it absorbs, this means that the colour changes.
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What indicator substance is used to test a leaf for starch?
Iodine Solution is used to determine whether starch is present.
Is blending food a physical or chemical change?
For the purposes of a basic chemistry course, blending food is a physical change since it typically involves only a change in particle size to create a mixture. There are cases where blending food causes chemical changes, for instance when mixing the ingredients to make muffins. In this case, the baking soda and acid combine to produce carbon dioxide (among other things), and certain protein substances in the flour combine chemically to form gluten. In the simplest case, however, the blending of food is a physical change.
Why do leaves change in autumn?
IT is cold so its not that much sunlight so the leaves can not make food so the photosynthesis stops and the leaves die and change colors
Bacteria produce chemicals that provide food with certain taste?
Idl
Is digesting food an example of change of state?
Yes it is a change of state when the food is being digested. Solid food particles are changed into semisolid type of liquid in the stomach where it is further digested. Food molecules have to be changed into simple units before it can be absorbed into our cells.
Is there a method for detecting starch without using iodine?
if you put iodine in food and it contains starch it should change color.
When iodine solution is mixed with an unknown sample of food the mixture turn blue black this color change indicates the presence of?
An enzyme.
At room temperature the element iodine is purple soild that easily becomes a gas why is the change in the iodine classified as a physical change?
Why does the food change purple when iodine is put in it.
How could you find out if starch is in food?
if you was to put iodine it to the food its color changes.
What is the effect of iodine on saturated fats?
Iodine shows its purple color if saturated fat is present in that food/drink. The longer it takes the iodine to clear, the more saturated fat there is i the food/drink.
The color seen when iodine is placed on starchy food is?
http://en.wikipedia.org/wiki/Iodine_test
Why does iodine turn food blue?
I did this experiment at my middle school and any food that turns blue has carbohydrates in it. Ifi t doesn't change colour then it has no carbohydrates.
Would a chickens egg color be affected if fed a certain food?
Probably not. The only colour it could change is to a more browner cream.
Is food color is dropped into water to give it color a chemical change?
no, a physical change
How does blue food coloring change the color of cosmos?
the chlorplasts trap in the color to make it change
Does Crossroads have all gluten food?
No. Food in wrap with a certain color sticker do not have gluten.
Where can you find potassium iodine in food?
Iodine is in salt
