Phản ứng oxi hoá khử , giúp mình với ạ. 6, KClO3 + HBr ___ KCl + Br2 + H2O 7, H2S + HNO3 ___ H2SO4 + NO + H2O 8, Br2 + Cl2 + H2O ____ HBrO3 + HCl 9, HBr + H2SO4 (đặc) _____ SO2 + Br2 + H2O 10, HI + H2SO4(đ) _____ H2S + I2 + H2O 11, P + HNO3(loãng) + H2O ____ H3PO4 + NO 12, P + H2SO4(đ) _____ H3PO4 + SO2 + H2O

6. Cl+5 +6e->Cl- .1

   2Br- ->Br2+2e  .3

->KClO3 + 6HBr ->KCl + 3Br2 + 3H2O

7. S-2 ->S+6 +8e  .3

  N+5 +3e->N+2  .8

-> 3H2S + 8HNO3 -> 3H2SO4 + 8NO + 4H2O

8. Cl2+2e ->2Cl-       .5

   Br2->2Br+5 +10e  .1

->Br2 + 5Cl2 + 6H2O ->2HBrO3 + 10HCl

9. 2Br-1 ->Br2+2e

   S+6 +2e ->S+4

->2HBr + H2SO4 (đặc) -> SO2 + Br2 + 2H2O

10. 2I- ->I2 +2e    .4

     S+6 +8e->S-2

->8HI + H2SO4(đ) ->H2S + 4I2 + 4H2O

11. P ->P+5 +5e     .3

    N+5 +3e->N+2  .5

->3P + 5HNO3(loãng) + 2H2O -> 3H3PO4 + 5NO

12. P ->P+5 +5e    .2

     S+6 +2e->S+4  .5

->2P + 5H2SO4(đ) -> 2H3PO4 + 5SO2 + 2H2O