2NaOH + PbCl2 -> 2NaCl + Pb(OH)4NaOH + Si + 2H2O -> Na2SiO3 + 4H2AgNO3 + HBr -> 2AgBr + HNO2Al + 3Na2SO4 -> 3Na2SO4 + 2Al2(SO4)CuCl2 + 2NaOH -> Cu(OH)2 + 2NaCH2SO4 + NaOH -> Na2SO4 + 2H2O
2NaOH + PbCl2 -> 2NaCl + Pb(OH)
4NaOH + Si + 2H2O -> Na2SiO3 + 4H
2AgNO3 + HBr -> 2AgBr + HNO
2Al + 3Na2SO4 -> 3Na2SO4 + 2Al2(SO4)
CuCl2 + 2NaOH -> Cu(OH)2 + 2NaC
H2SO4 + NaOH -> Na2SO4 + 2H2O