Question

Viết phương trình thể hiện dãy chuyển hoá sau:

a) \(C_7H_8\rightarrow KOH\rightarrow Fe\left(OH\right)_2\rightarrow FeCl_2\rightarrow Ag\)

b) \(ClO_2\rightarrow Cl_2\rightarrow HCl\rightarrow HBr\rightarrow H_2S\)

Answer 1

a) Dãy 1:

\(C_7H_8+2KMnO_4\underrightarrow{t^\circ}C_6H_5COOK+2MnO_2+H_2O+KOH\)

\(2KOH+FeCl_2\rightarrow2KCl+Fe\left(OH\right)_2\downarrow\)

\(Fe\left(OH\right)_2+2HCl\rightarrow FeCl_2+2H_2O\)

\(FeCl_2+3Ag\left(NO_3\right)\rightarrow Fe\left(NO_3\right)_3+2AgCl\downarrow+Ag\downarrow\)

b) Dãy 2:

\(2ClO_2+8HCl\rightarrow5Cl_2\uparrow+4H_2O\)

\(Cl_2+H_2\underrightarrow{t^\circ}2HCl\)

\(HCl+NaBr\rightarrow NaCl+HBr\)

\(2HBr+FeS\rightarrow FeBr_2+H_2S\)