c)
MnO2 + 4HCl => MnCl2 + Cl2 + 2H2O
Cl2 + 2KBr => 2KCl + Br2
Br2 + 2NaI => 2NaBr + I2
H2 + I2 -to-> 2HI
2HI + Cl2 => 2HCl + I2
d)
CaOCl2 + 2HCl => CaCl2 + Cl2 + H2O
CaCl2 -đpnc-> Ca + Cl2
2NaOH + Cl2 => NaCl + NaClO + H2O
NaClO + 2HCl => NaCl + Cl2 + H2O
NaCl + AgNO3 => NaNO3 + AgCl
AgCl -as,to-> Ag + 1/2Cl2
Chúc bạn học tốt !!!