Na-NaOH-Na2So4-NaCl-NaNo3
Na + 2 H2O → 2 NaOH + H2 CuSO4 +2 NaOH → Cu(OH)2 + Na2SO4 Na2SO4 + BaCl2 → 2NaCl + BaSO4 NaCl + AgNO3 →AgCl↓ + NaNO3