P + O2 = P2O5K + H2O = 2KOHK2O + H2O = 2KOHK2O + H3PO4 = 2K3PO4NaOH + H2S = Na2S + H2OBaCl + H2SO4 = BaSO4 + 2HCl
P + O2 = P2O5
K + H2O = 2KOH
K2O + H2O = 2KOH
K2O + H3PO4 = 2K3PO4
NaOH + H2S = Na2S + H2O
BaCl + H2SO4 = BaSO4 + 2HCl