Question

Закончите уравнение реакции внутримолекулярного окисления – восстановления. Какой атом или ион выполняет в данном случае роль окислителя, какой – восстановителя. Pb(NO3)2 PbO + NO2 +… Расставьте коэффициенты в уравнении методом электронного баланса.

Answer 1

2Pb(NO₃)₂ = 2PbO + 4NO₂↑ + O₂↑
2O⁻² - 4e = O₂⁰ | 1 | восстановитель
N⁺⁵ + 1e = N⁺⁴ | 4 | окислитель

Answer 2

Equation of Intramolecular Redox Reaction and Identification of Oxidizing and Reducing Agents

The equation of the intramolecular redox reaction is as follows:

Pb(NO3)2 + PbO + → NO2 +

In this reaction, we need to identify the oxidizing agent and the reducing agent. The oxidizing agent is the species that gets reduced, while the reducing agent is the species that gets oxidized.

To balance the equation using the method of electron balance, we need to assign oxidation numbers to each element in the reaction. The oxidation number is a positive or negative number that represents the charge an atom would have if the electrons in a compound were assigned completely to the more electronegative atom.

Let's assign oxidation numbers to the elements in the given reaction:

- Pb(NO3)2: The oxidation number of Pb is +2, the oxidation number of N is -3, and the oxidation number of O is -2. - PbO: The oxidation number of Pb is +2, and the oxidation number of O is -2. - NO2: The oxidation number of N is +4, and the oxidation number of O is -2.

Now, let's analyze the changes in oxidation numbers:

- Pb in Pb(NO3)2 is reduced from +2 to 0 in PbO. - N in NO3 is reduced from +5 to +4 in NO2.

Based on the changes in oxidation numbers, we can identify the oxidizing and reducing agents:

- The oxidizing agent is Pb(NO3)2 because it causes the reduction of Pb from +2 to 0. - The reducing agent is PbO because it causes the oxidation of N from +5 to +4.

To balance the equation, we need to ensure that the number of atoms and charges are balanced on both sides of the equation. The balanced equation using the method of electron balance is:

2Pb(NO3)2 + 2PbO → 4NO2

Please note that the coefficients in front of the formulas represent the number of molecules or formula units, and they are used to balance the equation.