Question

Из представленных схем реакций выберите схемы окислительно-восстановительных реакций Определите в них степени окисления всех атомов Расставьте коэффициенты Укажите окислитель и восстановитель Al + CuCl2 = AlCl3 + CuHCl + CaCO3 = CaCl2 + CO2 + H2ONaCl + AgNO3 = NaNO3 + AgClN2 + O2 = NO​

Answer 1

Объяснение:

2Al+3CuCl2=2AlCl3+3Cu

Al(0)+Cu(+2)Cl(-)=Al(+3)Cl(-)+Cu(0)

Al(0)-3e=Al(+3). 2. ок-ие

в-ль

Cu(+2)+2e=Cu(0). 3. в-ие

ок-ль

N2+O2=2NO

N(0)+O(0)=N(+2)O(-2)

N2(0)-4e=2N(+2). 1. ок-ие

в-ль

O2(0)+4e=2O(-2). 1. в-ие

ок-ль

Answer 2

Ответ:

Объяснение:

окислительно-восстановительными реакциями являются те, в которых у элементов поменялись степени окисления, это реакции 1 и 4

Answer 3

Identifying Oxidation-Reduction Reactions and Assigning Oxidation States

To identify the oxidation-reduction (redox) reactions from the given chemical equations, we need to determine the changes in oxidation states for the atoms involved in the reactions. Let's start by examining the provided chemical equations and identifying the redox reactions.

1. Al + CuCl2 = AlCl3 + Cu 2. CaCO3 = CaCl2 + CO2 + H2O 3. NaCl + AgNO3 = NaNO3 + AgCl 4. N2 + O2 = NO

Now, let's determine the oxidation states of the atoms in each equation and identify the redox reactions.

1. Al + CuCl2 = AlCl3 + Cu - The oxidation state of Al changes from 0 to +3, indicating oxidation. - The oxidation state of Cu changes from +2 to 0, indicating reduction. - This is a redox reaction.

2. CaCO3 = CaCl2 + CO2 + H2O - The oxidation states of the atoms in this equation do not change. Therefore, this is not a redox reaction.

3. NaCl + AgNO3 = NaNO3 + AgCl - The oxidation state of Ag changes from +1 to 0, indicating reduction. - The oxidation state of Na changes from 0 to +1, indicating oxidation. - This is a redox reaction.

4. N2 + O2 = NO - The oxidation state of N changes from 0 to +2, indicating oxidation. - The oxidation state of O changes from 0 to -2, indicating reduction. - This is a redox reaction.

Balancing the Redox Reactions

Now that we have identified the redox reactions, let's balance the chemical equations by assigning coefficients to ensure that the number of atoms of each element is the same on both sides of the equation.

1. Al + CuCl2 = AlCl3 + Cu - The balanced equation is: ``` 2Al + 3CuCl2 = 2AlCl3 + 3Cu ```

2. CaCO3 = CaCl2 + CO2 + H2O - This equation is not a redox reaction, so it does not need to be balanced in the context of redox reactions.

3. NaCl + AgNO3 = NaNO3 + AgCl - The balanced equation is: ``` NaCl + AgNO3 = NaNO3 + AgCl ```

4. N2 + O2 = NO - The balanced equation is: ``` N2 + O2 = 2NO ```

Conclusion

In summary, the identified redox reactions are: 1. Al + CuCl2 = AlCl3 + Cu 2. NaCl + AgNO3 = NaNO3 + AgCl 3. N2 + O2 = 2NO

The oxidation states of the atoms involved in these reactions have been determined, and the balanced chemical equations have been provided. If you have any further questions or need additional assistance, feel free to ask!