2KOH+H2S--->K2S+2H2O
2K+ +2OH- +2H+ +S2- --->2K+ +S2- +2H2O
2OH- +2H+ --->2H2O
3KOH+H3PO4--->K3PO4+3H2O
3K+ +3OH- +3H+ +PO4 3- --->3K+ +PO4 3- +3H2O
3OH- +3H+ --->3H2O
Ca(OH)2+2HCl--->CaCl2+2H2O
Ca2+ +2OH- +2H+ +2Cl- --->Ca2+ +2Cl- +2H2O
2OH- +2H+ --->2H2O
Ca(OH)2+H2SO4--->CaSO4+2H2O
Ca2+ +2OH- +2H+ +SO4 2- --->Ca2+ +SO4 2- +2H2O
2OH- +2H+ --->2H2O