HCl. This molecule readily gives up its H+ component in aqueous solution and is astrong acid. Other acids, such as carbonic acid (H2CO3), give up their protons more reluctantly and are calledweak acids. When an acid (HA) donates a proton (H+), it is said to be ionized, with the ...
Molarity is an especially convenient way to measure concentration of stomach acid because hydrochloric acid is very strong, so just about all of the HCl molecules split up into H+ and Cl- ions. The H+ ions do not float freely in solution, but attach to water molecules to become H3O+. Th...