The chemical composition of hydrochloric acid is represented by the formula \( \text{HCl} \). It is a strong acid formed by the combination of hydrogen and chlorine. Hydrochloric acid is highly soluble in water and dissociates completely into hydrogen ions (H⁺) and chloride ions (Cl⁻) when dissolved. It plays a crucial role in the stomach’s digestive process, aiding in the breakdown of food and killing harmful microorganisms. In industrial contexts, hydrochloric acid is used in metal cleaning, food processing, and pH regulation. Its corrosive nature requires careful handling and storage to avoid hazards.