Question

Why is baking powder used to prepare cake?

Answer 1

Baking powder is a chemical derivative of sodium. The chemical name of baking powder is sodium bicarbonate and the chemical formula for the same can be given as $NaHC{O_3}$ . Sodium bicarbonate or baking powder or baking soda is generally used in the preparation of cakes and breads.

Complete Step-by-Step Answer:
Before we move forward with the solution of the given question, let us first understand some important basic concepts.
While baking cakes or breads, one of the most characteristics under consideration is the rising of the cake. This is important because it gives the cake a light and fluffy texture which is often desirable. Along with flour and eggs and other flavoured ingredients, the most important ingredients in a cake are yeast and baking powder. The yeast in the recipe reacts with the baking powder to release carbon dioxide. This carbon dioxide is necessary for the cake to rise and give it that fluffy texture.
The chemical reaction for the same can be given as:
$NaHC{O_3} + {H^ + } \to N{a^ + } + C{O_2} + {H_2}O$

Additional information:
While preparing cakes, various alternatives for baking powder can be used.
Buttermilk, plain yogurt: Due to their acidity, combining it with baking soda can give the same effect as baking powder.
Molasses, sour milk, cream of tartar (also known as potassium hydrogen tartrate), vinegar, lemon juice, whipped egg whites, etc. can also be excellent substitutes for baking powder.

Note: Baking powders also include components to improve their stability and consistency. Corn starch, flour, or potato starch are often used as buffers.