Question

Используя электрохимический ряд напряжений металлов и схему разложения нитратов, составьте уравнение разложения следующих солей: KNO3, Cu(NO3)2, AgNO3, Hg(NO3)2, Ca(NO3)2 , Zn(NO3)2.Помогите пожалуйста!!!​

Answer 1

Ответ:

2KNO3 = 2KNO2+O2

2Cu(NO3)2 = 2CuO+4NO2+O2

2AgNO3 =2Ag+2NO2+O2

Hg(NO3)2 = Hg+2NO2+O2

2Ca(NO3)2 =2CaNO2+3O2

Zn(NO3)2 = ZnO+2NO2+O2

Answer 2

Electrochemical Series and Decomposition of Metal Nitrates

To determine the decomposition of metal nitrates using the electrochemical series, we need to refer to the standard reduction potentials of the metals involved. The electrochemical series is a list of metals arranged in order of their standard reduction potentials. Metals higher in the series have a greater tendency to undergo reduction (gain electrons), while metals lower in the series have a greater tendency to undergo oxidation (lose electrons).

Here is the electrochemical series of metals:

1. Potassium (K) 2. Calcium (Ca) 3. Sodium (Na) 4. Magnesium (Mg) 5. Aluminum (Al) 6. Zinc (Zn) 7. Iron (Fe) 8. Lead (Pb) 9. Hydrogen (H) 10. Copper (Cu) 11. Silver (Ag) 12. Mercury (Hg) 13. Gold (Au)

Based on the electrochemical series, we can determine the decomposition of the following metal nitrates:

Potassium Nitrate (KNO3)

Potassium (K) is higher in the electrochemical series than nitrogen (N). Therefore, potassium nitrate (KNO3) will decompose into potassium oxide (K2O) and nitrogen dioxide (NO2) gas.

The balanced equation for the decomposition of potassium nitrate is:

2 KNO3(s) → 2 K2O(s) + 2 NO2(g) + O2(g)

Copper Nitrate (Cu(NO3)2)

Copper (Cu) is lower in the electrochemical series than nitrogen (N). Therefore, copper nitrate (Cu(NO3)2) will not decompose under normal conditions.

Silver Nitrate (AgNO3)

Silver (Ag) is lower in the electrochemical series than nitrogen (N). Therefore, silver nitrate (AgNO3) will not decompose under normal conditions.

Mercury Nitrate (Hg(NO3)2)

Mercury (Hg) is lower in the electrochemical series than nitrogen (N). Therefore, mercury nitrate (Hg(NO3)2) will not decompose under normal conditions.

Calcium Nitrate (Ca(NO3)2)

Calcium (Ca) is higher in the electrochemical series than nitrogen (N). Therefore, calcium nitrate (Ca(NO3)2) will decompose into calcium oxide (CaO), nitrogen dioxide (NO2) gas, and oxygen (O2) gas.

The balanced equation for the decomposition of calcium nitrate is:

2 Ca(NO3)2(s) → 2 CaO(s) + 4 NO2(g) + O2(g)

Zinc Nitrate (Zn(NO3)2)

Zinc (Zn) is higher in the electrochemical series than nitrogen (N). Therefore, zinc nitrate (Zn(NO3)2) will decompose into zinc oxide (ZnO), nitrogen dioxide (NO2) gas, and oxygen (O2) gas.

The balanced equation for the decomposition of zinc nitrate is:

2 Zn(NO3)2(s) → 2 ZnO(s) + 4 NO2(g) + O2(g)

Please note that the decomposition reactions mentioned above are based on the electrochemical series and assume standard conditions. In practice, other factors such as temperature and pressure may influence the decomposition reactions.

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