Number of Equivalents per Mole
How many equivalents are there per mole?
Equal to the number of hydrogen cations in an acid and the number of hydroxide ions for bases.
The number of equivalents per mole for acids and bases in redox reactions can be generally gauged by counting the number of hydrogen cations, or H+ in an oxidizing acid or the number of hydroxide anions, or OH–, in a reducing base. For example, H2SO4 has 2 equivalents per mole because 2 H+ ions are released when the acid is oxidized, and there are 2 equivalents per mole of Ca(OH)2 because 2 OH– ions are released when the base dissociates.