Đáp án:
Giải thích các bước giải:
a, 2NaCl -> 2Na +Cl2 (dk: dien phan nong chay)
Cl2 +H2 -> 2HCl (dk: anh sang )
HCl + KOH ->KCl +H2O
2KCl +O2 ->2KClO
3Cl2 + 6KOH ->5KCl +KClO3 +3H2O (dk : nhiet do ) (*)
b, 2KMnO4 + 16HCl -> 2KCl +2MnCl2 +5Cl2 +8H2O
Cl2 -> KClO3 <giong (*)>
2KClO3 -> 2KCl + 3O2 (nhiet do)
2KCL + 2H2O -> 2KOH + Cl2 + H2 (dk : dien phan dung dich co mang ngan)
3KOH + FeCl3 -> Fe(OH)3 ket tua + 3KCl
2Fe(OH)3 ->Fe2O3 + 3H2O (nhiet do )
Fe2O3 + 6HCl -> 2FeCl3 + 3H2O
FeCl3 + 3AgNO3 -> AgCl ket tua +Fe(NO3)3
2AgCl -> 2Ag +Cl2 (dk : anh sang )
c, Cl2 -> HCl ->KCl ->Cl2 (tuong tu nhu cau tren )
Cl2 + 2NaBr -> 2NaCl + Br2
Br2 + 2NaI -> 2NaBr + I2
NaBr +HCl -> NaCl + HBr
MnO2 + 4HBr -> MnBr2 +Br2 + 2H2O
Br2 + NaI -> NaBr +I2