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$\mathop{S}\limits^{0}+$`NaOH->`$Na_2\mathop{S}\limits^{+6}O_4+Na_2\mathop{S}\limits^{-2}+H_2O$

`1xx|`$\mathop{S}\limits^{0 }$`->` $ \mathop{S}\limits^{+6}+6e$

`3xx|` $\mathop{S}\limits^{0}+2e$ `->` $\mathop{S}\limits^{-2}$

`=>4S+8NaOH->Na_2SO_4+3Na_2S+4H_2O`

`13.`

$\mathop{Br_2}\limits^{0}+$`NaOH->`$Na\mathop{Br}\limits^{-1}+Na\mathop{Br}\limits^{+5}O_3+H_2O$

`1xx|`$\mathop{Br_2}\limits^{0 }$`->` $ \mathop{2Br}\limits^{+5}+10e$

`5xx|` $\mathop{Br_2}\limits^{0}+2e$ `->` $\mathop{2Br}\limits^{-1}$

`=>3Br_2+6NaOH->5NaBr_2+NaBrO_3+3H_2O`