Ok 咁H2SO4個個係equilibrium黎
2H+ + SO4(2-) <->> H+ + HSO4- <<-> H2SO4
差唔多所多H2SO4 都ionise做HSO4-
但係HSO4- ionise to SO4(2-)係less favourable既
(Removal of a hydrogen ion from a negative charged complex ion is less favourable due to the electrostatic attraction)
所以放唔曬total 2 mole of H+
Concentration of H+ in 1M H2SO4自然低過2M HCl