wht is the difference between baking soda and baking powder,peparation,formula and uses

Baking soda is pure sodium bicarbonate. When baking soda is combined with moisture and an acidic ingredient (e.g., yogurt, chocolate, buttermilk, honey), the resulting chemical reaction produces bubbles of carbon dioxide that expand under oven temperatures, causing baked goods to rise.

Baking powder contains sodium bicarbonate, but it includes the acidifying agent already (cream of tartar), and also a drying agent.

Uses:

Both baking soda and baking powder are leavening agents, which means they are added to baked goods before cooking to produce carbon dioxide and cause them to 'rise'.

Preparation of Sodium bicarbonate:

Sodium bicarbonate can be prepared by the following chemical reaction:

CO₂ + NH₃  + NaCl + H₂O → NaHCO₃  + NH₄Cl