carbohydrates Flashcards

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1
Q

what solution is used

A

Iodine

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2
Q

what are the steps to the test

A

add food to spotting tile

add few drops of iodine

see results

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3
Q

what is the positive result of the starch test

A

Yellow brown to bluey black

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4
Q

what causes the colour change

A

when food is dissolved in potassium iodide, the iodine forms a triiodide ion which slips into the amylose helix. causing colour change

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