Question

Урівняйте рівняння методом електронного балансу і вкажіть де окисник, а де відновник: ZnO + Al → Al2O3 + ZnMg + HNO3(k)→​

Answer 1

3ZnO+2Al=Al2O3+3Zn

Zn(+2) +2e ----->Zn(0) ----3

2Al(0)-6e ------>Al2(+3)----1

Mg+4HNO3=Mg(NO3)2+2NO2+2H2O

Mg(0)-2e----->Mg(+2)-----1

N(+5)+1e------->N(+4)-------2

Answer 2

Balancing the Equation using the Method of Electron Balance

To balance the given equation using the method of electron balance, we need to ensure that the number of electrons gained (reduction) is equal to the number of electrons lost (oxidation). Let's balance the equation step by step.

The given equation is:

ZnO + Al → Al2O3 + ZnMg + HNO3(k)

Balancing the Oxygen Atoms

First, let's balance the oxygen atoms by adding water (H2O) molecules to the equation. We can see that there are 3 oxygen atoms on the left side and 3 oxygen atoms on the right side. Therefore, the oxygen atoms are already balanced.

ZnO + Al → Al2O3 + ZnMg + HNO3(k)

Balancing the Hydrogen Atoms

Next, let's balance the hydrogen atoms by adding hydrogen ions (H+) to the equation. We can see that there are no hydrogen atoms on the left side and 3 hydrogen atoms on the right side. Therefore, we need to add 3 hydrogen ions to the left side of the equation.

ZnO + Al + 3H+ → Al2O3 + ZnMg + HNO3(k)

Balancing the Charge

Now, let's balance the charge by adding electrons (e-) to the equation. We can see that the charge on the left side is 0, while the charge on the right side is +3. Therefore, we need to add 3 electrons to the left side of the equation.

ZnO + Al + 3H+ + 3e- → Al2O3 + ZnMg + HNO3(k)

Balancing the Zinc Atoms

Next, let's balance the zinc atoms. We can see that there is 1 zinc atom on the left side and 1 zinc atom on the right side. Therefore, the zinc atoms are already balanced.

ZnO + Al + 3H+ + 3e- → Al2O3 + ZnMg + HNO3(k)

Balancing the Aluminum Atoms

Now, let's balance the aluminum atoms. We can see that there is 1 aluminum atom on the left side and 2 aluminum atoms on the right side. Therefore, we need to add another aluminum atom to the left side of the equation.

ZnO + Al + 3H+ + 3e- → Al2O3 + ZnMg + HNO3(k)

Balancing the Nitrogen Atoms

Finally, let's balance the nitrogen atoms. We can see that there is 1 nitrogen atom on the left side and 1 nitrogen atom on the right side. Therefore, the nitrogen atoms are already balanced.

ZnO + Al + 3H+ + 3e- → Al2O3 + ZnMg + HNO3(k)

Identifying the Oxidizing and Reducing Agents

In the balanced equation, ZnO is the oxidizing agent because it is being reduced (gaining electrons) from Zn2+ to Zn. On the other hand, Al is the reducing agent because it is being oxidized (losing electrons) from Al to Al3+.

To summarize: - Oxidizing agent: ZnO - Reducing agent: Al

Please note that the given equation is not balanced in terms of the number of atoms on both sides. The balanced equation is provided above after applying the method of electron balance.

I hope this helps! Let me know if you have any further questions.