CO$OH$2 -> CO2 + H2OAl2$SO4$3 -> 2Al3+ + 3SO4^2-H2SiO3 -> 2H+ + SiO$OH$2-H3PO4 -> 3H+ + PO4^3-H2S -> 2H+ + S^2-Ba$NO3$2 -> Ba^2+ + 2NO3^-KHSO4 -> K+ + HSO4^-