Is bi-carbonate of soda the same as baking soda?

Yes, bicarbonate of soda is the same as baking soda. The chemical name for both is sodium bicarbonate. It is a white, crystalline powder that is commonly used as a leavening agent in baking. When baking soda is added to a batter or dough, it reacts with an acid, such as buttermilk or vinegar, to produce carbon dioxide gas. This gas causes the batter or dough to rise, resulting in a light and fluffy texture. Baking soda is also used as a cleaning agent and a deodorant.