Why is starch solution applied near endpoints in chemical or biological experiments, and what purpose does it serve?
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Why is starch solution applied near endpoints in chemical or biological experiments, and what purpose does it serve?
Starch solution is applied near endpoints in chemical or biological experiments as an indicator for iodine-based reactions. Starch reacts with iodine to form a blue-black complex, which is a visible signal of the endpoint. This method is commonly used in titrations to detect the presence of excess iodine or as an endpoint indicator in certain reactions.