2NaOH + PbCl2 -> 2NaCl + Pb(OH)24NaOH + Si + 2H2O -> Na2SiO3 + 4H22AgNO3 + HBr -> 2AgBr + HNO32Al + 3Na2SO4 -> 3Na2SO4 + 2Al2(SO4)3CuCl2 + 2NaOH -> Cu(OH)2 + 2NaClH2SO4 + NaOH -> Na2SO4 + 2H2O
2NaOH + PbCl2 -> 2NaCl + Pb(OH)2
4NaOH + Si + 2H2O -> Na2SiO3 + 4H2
2AgNO3 + HBr -> 2AgBr + HNO3
2Al + 3Na2SO4 -> 3Na2SO4 + 2Al2(SO4)3
CuCl2 + 2NaOH -> Cu(OH)2 + 2NaCl
H2SO4 + NaOH -> Na2SO4 + 2H2O