What happens when baking soda and iodine are mixed?

Answer 1

I assume that the questioner means what happens when iodine and baking soda (sodium bicarbonate or NaHCO3) are mixed in water.

Whether the components are mixed in water or not, no chemical reaction would take place. If added to water, both the iodine and baking soda would dissolve, and the water would become a dark, reddish-brown. Iodine usually acts as an oxidizing agent, but iodine does not oxidize baking soda because the carbon atom in baking soda already has a formal charge of +4, and oxygen is a more powerful oxidizer than iodine.

Answer 2

This answer that the solution just turns a dark colour when iodine and bicarb are mixed is just plain wrong. If you mix 900ml water with 100 ml iodine the solution turns dark red. Then add three heaped tablespoons of bicarb. Leave for 24 hours. The mixture will turn absolutely clear. If that does not work for you then add more bicarb. It works.

So what is the reaction that is taking place? Proper answer please. Lets not guess.

Answer 3

I mix baking soda with a few drops of distilled water, just enough to make a paste, then add a couple of drops of Lugol's iodine. Within a half-hour or so I can smell a pleasant reaction odor in the glass and by the next morning the color of the iodine is gone. So I believe the baking soda turns the iodine to salt like vitamin C does, so I have read?

Answer 4

Iodine turns dark blue, almost black, in the presence of starch. Flour is mostly starch.

Answer 5

Remain as it is