Question

Дорівняти рівняння реакцій, розставивши коефіціенти: 1. ВаО + НСІ = ВаСІ₂ + Н₂О 2. Аg + S = Аg₂S 3. Na + О₂= Nа₂О 4. АІ + О₂→ АІ₂Оз

Answer 1

Ответ:

1. ВаО + 2НСІ = ВаСІ₂ + Н₂О

2. 2Аg + S = Аg₂S

3. 4Na + О₂=2 Nа₂О

4. 4АІ + 3О₂→ 2АІ₂Оз

Answer 2

Balancing Chemical Equations:

Balancing chemical equations involves adjusting the coefficients of the reactants and products to ensure that the number of atoms of each element is the same on both sides of the equation. Let's balance the given equations:

1. VaO + HCl = VaCl2 + H2O

To balance this equation, we need to ensure that the number of atoms of each element is the same on both sides. Let's start by balancing the oxygen atoms:

- There is 1 oxygen atom on the left side and 2 oxygen atoms on the right side. To balance the oxygen atoms, we can put a coefficient of 2 in front of HCl:

VaO + 2HCl = VaCl2 + H2O

Next, let's balance the chlorine atoms:

- There is 2 chlorine atoms on the right side, but only 1 on the left side. To balance the chlorine atoms, we can put a coefficient of 2 in front of VaCl2:

VaO + 2HCl = 2VaCl2 + H2O

Now, let's check if all the atoms are balanced:

- There are 1 vanadium atom, 2 oxygen atoms, 2 hydrogen atoms, and 2 chlorine atoms on both sides of the equation. Therefore, the equation is balanced.

2. Ag + S = Ag2S

To balance this equation, we need to ensure that the number of atoms of each element is the same on both sides. In this case, the equation is already balanced because there is 1 silver atom on both sides, as well as 1 sulfur atom on both sides.

3. Na + O2 = Na2O

To balance this equation, we need to ensure that the number of atoms of each element is the same on both sides. Let's start by balancing the sodium atoms:

- There is 2 sodium atoms on the right side, but only 1 on the left side. To balance the sodium atoms, we can put a coefficient of 2 in front of Na:

2Na + O2 = Na2O

Now, let's check if all the atoms are balanced:

- There are 2 sodium atoms and 2 oxygen atoms on both sides of the equation. Therefore, the equation is balanced.

4. Al + O2 → Al2O3

To balance this equation, we need to ensure that the number of atoms of each element is the same on both sides. Let's start by balancing the aluminum atoms:

- There is 2 aluminum atoms on the right side, but only 1 on the left side. To balance the aluminum atoms, we can put a coefficient of 2 in front of Al:

2Al + O2 → Al2O3

Now, let's check if all the atoms are balanced:

- There are 2 aluminum atoms and 3 oxygen atoms on both sides of the equation. Therefore, the equation is balanced.

In summary, the balanced equations are:

1. VaO + 2HCl = 2VaCl2 + H2O 2. Ag + S = Ag2S 3. 2Na + O2 = Na2O 4. 2Al + 3O2 → 2Al2O3

Please note that the coefficients in front of the formulas represent the number of molecules or moles of each substance involved in the reaction.