Giupppp câu b thoi nha

`a)`

$CH_3COONa + NaOH \xrightarrow{CaO,t^o} CH_4 + Na_2CO_3$
$2CH_4 \xrightarrow[lln]{1500^oC} C_2H_2 +3H_2$

$3C_2H_2 \xrightarrow{600^oC, \text{than hoạt tính}} C_6H_6$
$C_6H_6 + Br_2 \xrightarrow{Fe,t^o} C_6H_5Br + HBr$
`C_6H_5Br + NaOH -> C_6H_5ONa + HBr`

`C_6H_5ONa + CO_2 + H_2O -> C_6H_5OH + NaHCO_3`

`C_6H_5OH + 3Br_2 -> C_6H_5Br_3OH \downarrow + 3HBr`

`b)`

$C_6H_6 + Cl_2 \xrightarrow{Fe,t^o} C_6H_5Cl + HCl$

`C_6H_5Cl + NaOH -> C_6H_5ONa + HCl`

`C_6H_5ONa + CO_2 + H_2O -> C_6H_5OH + NaHCO_3`
$C_6H_5OH + 3HNO_{3(đặc)} \xrightarrow{H_2SO_{4(đặc)},t^o} C_6H_2(NO_2)_3OH + 3H_2O$