Предмет: Химия, автор: TheCrashMan

Решить цепочку превращений: Fe(NO3)3 → Fe(OH)3 → Fe2O3 → Fe → FeCl2
1) Записать цепочку, под каждой формулой подписать названия веществ.
2) Составить и решить все 4 уравнения.
3) Для уравнения 3 составить электронный баланс, указать окислитель и восстановитель.
4) Уравнения 1 и 4 решить в ионном виде.

Ответы

Автор ответа: monkeyme

Ответ:

1) Fe(NO₃)₃ → Fe(OH)₃ → Fe₂O₃ → Fe → FeCl₂

нитрат гидроксид оксид железо хлорид

железа (III) железа (III) железа (III) железа (II)

1. Fe(NO₃)₃ + 3NaOH → Fe(OH)₃↓ + 3NaNO₃

2. 2Fe(OH)₃ →t°→ Fe₂O₃ + 3H₂O

3. Fe₂O₃ + 3H₂ → 2Fe + 3H₂O

4. Fe + 2HCl → FeCl₂ + H₂↑

3. Fe₂⁺³O₃ + H₂⁰ → Fe⁰ + H₂⁺O

Fe⁺³ + 3e → Fe⁰ | 6 | 2 - окислитель

H₂⁰ - 2e → 2H⁺ | 6 | 3 - восстановитель

Fe₂O₃ + 3H₂ → 2Fe + 3H₂O

1. Fe(NO₃)₃ + 3NaOH → Fe(OH)₃↓ + 3NaNO₃

Fe³⁺ + 3NO₃⁻ + 3Na⁺ + 3OH⁻ → Fe(OH)₃↓ + 3Na⁺ + 3NO₃⁻

Fe³⁺ + 3OH⁻ → Fe(OH)₃↓

4. Fe + 2HCl → FeCl₂ + H₂↑

Fe + 2H⁺ + 2Cl⁻ → Fe²⁺ + 2Cl⁻ + H₂↑

Fe + 2H⁺ → Fe₂⁺ + H₂↑

TheCrashMan: Спасибо большое!

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