Question

Закончите уравнения реакций и укажите тип каждой по признаку "кол-во и состав реагентов и продуктов реакции "1)CuO + 2HNO3 → CuNO3 + H2O2)Fe +CuSO4 → FeSo4 +Cu3)Na2O +H2O → 4) Cu(OH)2 → Cu + 2OH(в этих примерах как я понимаю нужны коэфициенты и где числа)

Answer 1

1) CuO + 2HNO3 --> Cu(NO3)2 + H2O - р-ия обмена
2) Fe + CuSO4 --> FeSO4 + Cu - р-ия замещения
3) Na2O + H2O --> 2NaOH - р-ия соединения
4) Cu(OH)2 --> CuO + H2O - р-ия разложения

Answer 2

Balancing Chemical Equations and Identifying Reaction Types

To balance the given chemical equations and identify the type of each reaction, let's start with the first equation:

1) CuO + 2HNO3 → Cu(NO3)2 + H2O

This is a redox reaction, as copper undergoes a change in oxidation state. Balancing the equation:

Step 1: Balance the atoms other than hydrogen and oxygen: CuO + 2HNO3 → Cu(NO3)2 + H2O Cu: 1 Cu on both sides N: 2 N on both sides O: 6 O on both sides

Step 2: Balance the oxygen atoms by adding water molecules: CuO + 2HNO3 → Cu(NO3)2 + H2O

Step 3: Balance the hydrogen atoms by adding H+ ions: CuO + 2HNO3 → Cu(NO3)2 + H2O

Step 4: Balance the charge by adding electrons: CuO + 2HNO3 → Cu(NO3)2 + H2O

Step 5: Verify the balance of all atoms and charges: CuO + 2HNO3 → Cu(NO3)2 + H2O

The balanced equation is: CuO + 2HNO3 → Cu(NO3)2 + H2O[[1]]

Moving on to the second equation:

2) Fe + CuSO4 → FeSO4 + Cu

This is a single displacement reaction. Balancing the equation:

Step 1: Balance the atoms other than hydrogen and oxygen: Fe + CuSO4 → FeSO4 + Cu Fe: 1 Fe on both sides Cu: 1 Cu on both sides S: 1 S on both sides O: 4 O on both sides

Step 2: Balance the charge by adding electrons: Fe + CuSO4 → FeSO4 + Cu

Step 3: Verify the balance of all atoms and charges: Fe + CuSO4 → FeSO4 + Cu

The balanced equation is: Fe + CuSO4 → FeSO4 + Cu[[2]]

Finally, let's balance the third equation:

3) Na2O + H2O → NaOH

This is a double displacement reaction. Balancing the equation:

Step 1: Balance the atoms other than hydrogen and oxygen: Na2O + H2O → 2NaOH Na: 2 Na on both sides O: 2 O on both sides H: 2 H on both sides

Step 2: Verify the balance of all atoms and charges: Na2O + H2O → 2NaOH

The balanced equation is: Na2O + H2O → 2NaOH[[3]]

In the given examples, the coefficients indicate the number of molecules of each substance involved in the reaction.