Question

Đã trả lời bởi chuyên gia

Answer 1

a) ${\overset{+ 3}{F e}}_{2} {\overset{- 2}{O}}_{3} + \overset{+ 2}{C} \overset{- 2}{O} \to \overset{0}{F e} + \overset{+ 4}{C} {\overset{- 2}{O}}_{2}$

$\overset{+ 3}{2 F e} + 6 e \to 2 \overset{0}{F e}$

$\overset{+ 2}{C} \to \overset{+ 4}{C} + 2 e$

$\begin{matrix} 1 \times \\ 3 \times \end{matrix} |\begin{array}{l} \overset{+ 3}{2 F e} + 6 e \to 2 \overset{0}{F e} \\ \overset{+ 2}{C} \to \overset{+ 4}{C} + 2 e \end{array}$
⇒ $2 \overset{+ 3}{F e} + 3 \overset{+ 2}{C} \to 2 \overset{0}{F e} + 3 \overset{+ 4}{C}$

⇒ Fe₂O₃ + 3CO → 2Fe + 3CO₂

b) $\overset{- 3}{N} {\overset{+ 1}{H}}_{3} + {\overset{0}{O}}_{2} \to \overset{+ 2}{N} \overset{- 2}{O} + {\overset{+ 1}{H}}_{2} \overset{- 2}{O}$

$\begin{array}{l} \overset{- 3}{N} \to \overset{+ 2}{N} + 5 e \\ \overset{0}{O} + 2 e \to \overset{- 2}{O} \end{array}$

$\begin{matrix} 2 \times \\ 5 \times \end{matrix} |\begin{array}{l} \overset{- 3}{N} \to \overset{+ 2}{N} + 5 e \\ \overset{0}{O} + 2 e \to \overset{- 2}{O} \end{array}$

$2 \overset{- 3}{N} + 5 \overset{0}{O} \to 2 \overset{+ 2}{N} + 5 \overset{- 2}{O}$

2NH₃ + $\frac{5}{2}$ O₂ → 2NO + 3H₂O

Có thể viết thành: 4NH₃ + 5O₂ → 4NO + 6H₂O

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Answer 2