AsCl3+ 3NaOH→H3AsO3+3NaCl; As3+ + 3Cl- + 3Na+ + 3OH- = H3AsO3 + 3Na+ + 3Cl-As3+ + 3OH- = H3AsO3H3AsO3+3NaOH→ Na3AsO3+ 3H2OH3AsO3 + 3Na+ + 3OH- = 3Na+ + AsO33- + 3H2OH3AsO3 + 3OH- = AsO33- + 3H2OAsCl5+ 5NaOH→H3AsO4+5NaCl+H2O; As53+ + 5Cl- + 5Na+ + 5OH- = H3AsO4 + 5Na+ + 5Cl- +H2OAs5+ + 5OH- = H3AsO4 +H2OH3AsO4+3NaOH→ Na3AsO4+ 3H2OH3AsO4 + 3Na+ + 3OH- = 3Na+ + AsO43- + 3H2OH3AsO4 + 3OH- = AsO43- + 3H2O