Firstly baking soda is a primary ingredient baking, as its name suggests. Its main factor is in cake and some bread recipes this is why you would always see bread fluffy and light and not flat and rough and it is like this because of the baking powder. Baking soda is nothing but Sodium Bicarbonate; it reacts to the acids that are found in some foods, making it release a sufficient amount of carbon dioxide (CO2) during the time that it is baked. When it is finally baked the product will leave sponge-like texture.
This does not only happen in baking, Vinegar can also make the baking soda simulate an eruption due to the acid in the vinegar having a chemical reaction to the sodium hydrogen carbonate (baking soda) making it release CO2 (carbon dioxide).
Secondly baking powder has baking soda, acid salts and starch. An acid salt is chemicals such as sodium aluminium phosphate and tartaric acid. Rice or corn is commonly used as the starch.
For centuries baking powder has been developed so that people who use it do not have to add vinegar (which we know that it is a reacting chemical) to get the baked food to rise. When you are using baking powder, unlike baking soda,