Question

Напишите уравнения реакции, соответствующие следующей схеме. Определите все окислительно-восстановительные реакции. Mg(NO3)2-Mg(OH)2-MgSo4-Mg(NO3)2-MgO-Mg-Mg(NO3)2

Answer 1

Mg(NO3)2 + 2NaOH = Mg(OH)2 + 2NaNO3
Mg(OH)2 + H2SO4 = MgSO4 + 2H2O
MgSO4 + Ba(NO3)2 = Mg(NO3)2 + BaSO4
2Mg(NO3)2 = 2MgO + 4NO2 + O2 (ОВР)
$\left. \begin{array}{r} \mathrm{2O^{-2}-4e^{-}\to O_{2}^{0}} \\ \mathrm{N^{+5}+e^{-}\to N^{+4}} \end{array} \right|4 \left| \begin{array}{l} \mathrm{1-reducing\;agent} \\ \mathrm{4-oxidizing\;agent} \end{array} \right.$
MgO + C = Mg + CO (ОВР)
$\left. \begin{array}{r} \mathrm{C^{0}-2e^{-}\to C^{+2}} \\ \mathrm{Mg^{+2}+2e^{-}\to Mg^{0}} \end{array} \right|2 \left| \begin{array}{l} \mathrm{1-reducing\;agent} \\ \mathrm{1-oxidizing\;agent} \end{array} \right.$
4Mg + 10HNO3 = 4Mg(NO3)2 + NH4NO3 + 3H2O (ОВР)
$\left. \begin{array}{r} \mathrm{Mg^{0}-2e^{-}\to Mg^{+2}} \\ \mathrm{N^{+5}+8e^{-}\to N^{-3}} \end{array} \right|8 \left| \begin{array}{l} \mathrm{4-reducing\;agent} \\ \mathrm{1-oxidizing\;agent} \end{array} \right.$

Answer 2

Chemical Reaction Equations

The chemical reactions corresponding to the given scheme are as follows:

1. Mg(NO3)2 → Mg(OH)2 - The reaction equation is: `Mg(NO3)2 + 2NaOH → Mg(OH)2 + 2NaNO3`.

2. Mg(OH)2 → MgSO4 - The reaction equation is: `Mg(OH)2 + H2SO4 → MgSO4 + 2H2O`.

3. MgSO4 → Mg(NO3)2 - The reaction equation is: `MgSO4 + 2HNO3 → Mg(NO3)2 + H2SO4` [[5]](https://elar.urfu.ru/bitstream/10995/40625/1/978-5-7996-1780-6_2016.pdf).

4. Mg(NO3)2 → MgO - The reaction equation is: `3Mg(NO3)2 → MgO + 2NO2 + 4O2` [[4]](https://biblioteka.sibsau.ru/pdf/izdv/izdv_sibgtu/Finogenko_Khimiya_2019.pdf).

5. MgO → Mg - The reaction equation is: `2MgO + C → 2Mg + CO2` [[6]](https://www.vvsu.ru/files/B4EE9C1C-7DC7-4CE5-88A7-8AD0D4B6F095).

6. Mg → Mg(NO3)2 - The reaction equation is: `3Mg + N2O → Mg(NO3)2` [[5]](https://elar.urfu.ru/bitstream/10995/40625/1/978-5-7996-1780-6_2016.pdf).

Oxidation-Reduction Reactions

The oxidation-reduction reactions in the given scheme are: 1. Mg(OH)2 → MgSO4 - This is an oxidation-reduction reaction where magnesium hydroxide (Mg(OH)2) is oxidized to magnesium sulfate (MgSO4) by sulfuric acid (H2SO4).

2. MgO → Mg - This is a reduction reaction where magnesium oxide (MgO) is reduced to magnesium (Mg) by carbon (C).

3. Mg → Mg(NO3)2 - This is an oxidation-reduction reaction where magnesium (Mg) is oxidized to magnesium nitrate (Mg(NO3)2) by nitrogen dioxide (NO2) and oxygen (O2) [[4]](https://biblioteka.sibsau.ru/pdf/izdv/izdv_sibgtu/Finogenko_Khimiya_2019.pdf).

These reactions involve the transfer of electrons and are categorized as oxidation-reduction reactions.

Feel free to ask if you have any more questions or need further assistance!