There are 2 chemical leavening agents we use while baking. Those agents would be baking soda and baking powder
Baking Soda
-is one ingredient called sodium bicarbonate (carbonate of soda)
-reacts with acid
-creates CO2 bubbles
Baking Powder
-double acting/reacts twice
-reaction 1: when mixed with liquids (about 25% of the reaction)
-reaction 2: when introduced to heat (remaining 75% of the action)
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