The chemical formula for baking soda is NaHCO3, which stands for sodium bicarbonate. This compound consists of sodium ions (Na+), hydrogen ions (H+), carbon atoms (C), and oxygen ions (O3). Baking soda is commonly used in cooking and baking as a leavening agent, helping to make dough rise by producing carbon dioxide gas when it reacts with an acid. It also has various applications beyond the kitchen, including cleaning, deodorizing, and neutralizing acidity in various substances. The versatility and safety of baking soda make it a staple in many households.