Why does heated baking soda react when you add tea?

Heated baking soda (sodium bicarbonate) reacts with tea primarily due to its basic nature. When mixed with the acidic components in tea, such as tannins and other organic acids, a chemical reaction occurs, producing carbon dioxide gas, which creates fizzing and bubbling. This reaction can also alter the flavor and color of the tea. Additionally, the heat can enhance the reaction rate, making the fizzing more pronounced.