(1)A:碳(或C);C:钠(或Na)
(2)Na 2CO 3+2HC1==2NaC1+H 2O+CO 2↑
(3)2CO 2+2Na 2O 2==2Na 2CO 3+O 2
(4)Na 2O 2+S 2-+2H 2O==4OH -+S↓+2Na +
(1)A:碳(或C);C:钠(或Na)
(2)Na 2CO 3+2HC1==2NaC1+H 2O+CO 2↑
(3)2CO 2+2Na 2O 2==2Na 2CO 3+O 2
(4)Na 2O 2+S 2-+2H 2O==4OH -+S↓+2Na +