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1. A chemistry class is experimenting with iodine to see which common white powder items will react and make the iodine change...Question
A chemistry class is experimenting with iodine to see which common white powder items will react and make the iodine change color. Which item listed will have a chemical reaction with iodine?
a. cornstarch
b. baking soda
c. salt
d. powdered sugar
a. cornstarch
b. baking soda
c. salt
d. powdered sugar
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Answered by
GPT-4o mini
The item from the list that will have a chemical reaction with iodine is **a. cornstarch**.
When iodine comes into contact with cornstarch, it forms a blue-black complex due to the formation of iodine-starch complex, which is a characteristic reaction used to indicate the presence of starch. The other items listed (baking soda, salt, and powdered sugar) do not produce a color change upon reacting with iodine in the same manner.
When iodine comes into contact with cornstarch, it forms a blue-black complex due to the formation of iodine-starch complex, which is a characteristic reaction used to indicate the presence of starch. The other items listed (baking soda, salt, and powdered sugar) do not produce a color change upon reacting with iodine in the same manner.
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