Na---Na2O---Na2SO4---NaCl-Na3PO4
1) 4Na + O2 = 2Na2O
2) Na2O + SO3 = Na2SO4
3)Na2SO4 + BaCl2 = BaSO4 ( осад) +2NaCl
4)3NaCl + Ag3PO4 = 3AgCl (осад) + Na3PO4
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Na---Na2O---Na2SO4---NaCl-Na3PO4
1) 4Na + O2 = 2Na2O
2) Na2O + SO3 = Na2SO4
3)Na2SO4 + BaCl2 = BaSO4 ( осад) +2NaCl
4)3NaCl + Ag3PO4 = 3AgCl (осад) + Na3PO4