Baking Powder and Baking Soda are both used non stop. Do you know the difference? It is mainly a chemical imbalance between the two.
Baking Soda is the BASE of any dish, it is usually combine with an acid and or sugar substance for it to feed on. This combination helps the cookies and or bread etc. rise.
Baking Powder is a mix. It contains Baking Soda, Cream of tartar and sometimes cornstarch. It has two phases to help the food cook and process. The first is during the mixing part of other ingredients, the second is when it is heated and rises and changes forms. Since it already has an acid based this is used for common recipes more.