5 bài tập Xác định số oxi hóa (có lời giải)

a) ; b) ;

c) ; d)

a)

b)

a)

b)

a) $\overset{0}{Fe},\ {\overset{0}{N}}_{2},\ \overset{+6}{S}{O}_{3},\ {H}_{2}\overset{+6}{S}{O}_{4},\ \overset{+2}{Cu}\overset{-2}{S},\ {\overset{+1}{Cu}}_{2}\overset{-2}{S},\ N{a}_{2}{\overset{-1}{O}}_{2},\ {H}_{3}\overset{+5}{As}{O}_{4}$

b) ${\overset{0}{Br}}_{2},\ {\overset{0}{O}}_{3},\ H\overset{+5}{Cl}{O}_{3},\ K\overset{+7}{Cl}{O}_{4},\ Na\overset{+1}{Cl}O,\ \overset{-3}{N}{H}_{4}\overset{+5}{N}{O}_{3},\ {\overset{+1}{N}}_{2}O,\ Na\overset{+3}{N}{O}_{2}$

c) $\overset{+4}{Mn}{O}_{2},\ {K}_{2}\overset{+6}{Mn}{O}_{4},\ {K}_{2}{\overset{+6}{Cr}}_{2}{O}_{7},\ {K}_{2}\overset{+6}{Cr}{O}_{4},\ {\overset{+3}{Cr}}_{2}{(S{O}_{4})}_{3},\ Na\overset{+3}{Cr}{O}_{2}$

d) $\overset{+2}{Fe}{S}_{2},\ \overset{+2}{Fe}S,\ \overset{+2}{Fe}O,\ {\overset{+3}{Fe}}_{2}{O}_{3},\ F{e}_{3}{O}_{4}\text{(}\overset{+2}{Fe}O.{\overset{+3}{Fe}}_{2}{O}_{3}\text{)}$

e) $B{r}^{-}\text{,}\overset{+5}{\text{P}}{\text{O}}_{4}^{3-}\text{,}\overset{+7}{\text{Mn}}{\text{O}}_{4}^{-}\text{,}\overset{+5}{\text{Cl}}{\text{O}}_{3}^{-}{\text{, H}}_{2}\overset{+5}{\text{P}}{O}_{4}^{-}\text{,}\overset{+6}{\text{S}}{\text{O}}_{4}^{2-}\text{,}\overset{-3}{\text{N}}{\text{H}}_{4}^{+}$