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Baking soda (sodium bicarbonate) needs an acid to react with. The reason you put it in things is to function as a leavening agent. The alkaline baking soda reacts with something acidic, releasing carbon dioxide bubbles into the batter and making it light and airy in texture.

As for why baking soda doesn't react with heat... it actually does. Above about 160 degrees F, it begins to break down into sodium carbonate, carbon dioxide and water. This too will release bubbles into your batter, giving it a texture, since not all batters are too acidic.

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15y ago

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