Câu 1 : Hoàn thành sơ đồ phản ứng
a , MnO2 \(\rightarrow\)Cl2\(\rightarrow\) HCl\(\rightarrow\)NaCl\(\rightarrow\)Cl2\(\rightarrow\)H2SO4\(\rightarrow\)HCl
b , BaCl2\(\rightarrow\)Cl2\(\rightarrow\)HCl\(\rightarrow\)FeCl2\(\rightarrow\)FeCl3\(\rightarrow\)BaCl2\(\rightarrow\)HCl
c , BaCl2\(\rightarrow\)HCl\(\rightarrow\)CuCl2\(\rightarrow\)KCl\(\rightarrow\)KOH\(\rightarrow\)KClO3\(\rightarrow\)Cl2