Question

Расставить коэффициенты методом электронного баланса: МnО2 + НС1 = МnС12 + С12 + Н20

Answer 1

Mn[+4]O2[-2] + H[+1]Cl[-1] → Mn[+2]Cl2[-1] + Cl2[0] + H2[+1]O[-2]

Mn[+4]+2ē→Mg[+2] | 1 | окислитель; восстановление.

2Cl[-1]-2ē→Cl2[0] | 1 | восстановитель; окисление.

MnO2 + 4HCl → MnCl2 + Cl2 + 2H2O

Answer 2

Balancing Chemical Equation Using Electron Balance Method

To balance the chemical equation MnO2 + HCl = MnCl2 + Cl2 + H2O using the electron balance method, we need to follow these steps:

1. Write down the unbalanced chemical equation: MnO2 + HCl = MnCl2 + Cl2 + H2O

2. Identify the oxidation states of each element: - Mn in MnO2: +4 - O in MnO2: -2 - H in HCl: +1 - Cl in HCl: -1 - Mn in MnCl2: +2 - Cl in MnCl2: -1 - O in H2O: -2

3. Determine the change in oxidation states for each element: - Mn: +4 to +2 (decrease by 2) - O: -2 to -1 (increase by 1) - H: +1 to 0 (decrease by 1) - Cl: -1 to 0 (increase by 1)

4. Balance the changes in oxidation states by adding electrons to the appropriate side of the equation: MnO2 + 4HCl = MnCl2 + Cl2 + 2H2O

5. Verify the balance of atoms and charges on both sides of the equation to ensure overall charge conservation.

6. The balanced chemical equation using the electron balance method is: MnO2 + 4HCl = MnCl2 + Cl2 + 2H2O

This method ensures that the number of electrons lost in the oxidation half-reaction is equal to the number of electrons gained in the reduction half-reaction, maintaining overall charge neutrality.

I hope this helps! If you have any further questions or need additional assistance, feel free to ask.