1) H2SiO3 + 2OH- = 2H2O + Si(OH)42H2SiO3 + 4OH- = 4H2O + 2Si(OH)4
2) H+ + OH- = H2OHCl + NaOH = NaCl + H2O
3) Cu2++ 2OH- = Cu(OH)2 ↓CuCl2 + 2NaOH = Cu(OH)2↓ + 2NaCl
1) H2SiO3 + 2OH- = 2H2O + Si(OH)4
2H2SiO3 + 4OH- = 4H2O + 2Si(OH)4
2) H+ + OH- = H2O
HCl + NaOH = NaCl + H2O
3) Cu2++ 2OH- = Cu(OH)2 ↓
CuCl2 + 2NaOH = Cu(OH)2↓ + 2NaCl