<Dl> <Dd> HCl + H O → H O + Cl </Dd> </Dl> <Dd> HCl + H O → H O + Cl </Dd> <P> The resulting solution is called hydrochloric acid and is a strong acid . The acid dissociation or ionization constant, K, is large, which means HCl dissociates or ionizes practically completely in water . Even in the absence of water, hydrogen chloride can still act as an acid . For example, hydrogen chloride can dissolve in certain other solvents such as methanol and protonate molecules or ions, and can also serve as an acid - catalyst for chemical reactions where anhydrous (water - free) conditions are desired . </P> <Dl> <Dd> HCl + CH OH → CH O H + Cl </Dd> </Dl>

Where is hydrochloric acid added to food mass