Question

Расставьте коэффициенты в схемах и уравнениях химических реакцийNa + H2O = NaOH + H2;CaCO3 = CaO + CO2;Zn + HCl = ZnCl2 + H2;S + O2 = SO2;Na2O + H2O = NaOH;NaOH + H2SO4 = Na2SO4 + HO

Answer 1

Решение на картинке) учи химию, а то всегда так плавать будешь)

Answer 2

Balancing Chemical Equations

To balance the given chemical equations, we need to ensure that the number of atoms of each element is the same on both sides of the equation. Let's balance each equation step by step:

1. Na + H2O = NaOH + H2

To balance this equation, we need to ensure that the number of sodium (Na) atoms, hydrogen (H) atoms, and oxygen (O) atoms is the same on both sides.

On the left side, we have 1 Na atom and 2 H atoms. On the right side, we have 1 Na atom, 1 O atom, 1 H atom, and 1 H2 molecule (which contains 2 H atoms).

To balance the hydrogen atoms, we need to put a coefficient of 2 in front of the H2O molecule:

2 Na + 2 H2O = 2 NaOH + H2

Now, the equation is balanced with 2 Na atoms, 4 H atoms, and 2 O atoms on both sides.

2. CaCO3 = CaO + CO2

On the left side, we have 1 Ca atom, 1 C atom, and 3 O atoms. On the right side, we have 1 Ca atom and 2 O atoms.

To balance the carbon (C) and oxygen (O) atoms, we need to put a coefficient of 1 in front of CaO and a coefficient of 1 in front of CO2:

CaCO3 = CaO + CO2

Now, the equation is balanced with 1 Ca atom, 1 C atom, and 3 O atoms on both sides.

3. Zn + HCl = ZnCl2 + H2

On the left side, we have 1 Zn atom and 1 H atom. On the right side, we have 1 Zn atom, 2 Cl atoms, and 1 H2 molecule (which contains 2 H atoms).

To balance the hydrogen atoms, we need to put a coefficient of 2 in front of HCl:

Zn + 2 HCl = ZnCl2 + H2

Now, the equation is balanced with 1 Zn atom, 2 Cl atoms, and 2 H atoms on both sides.

4. S + O2 = SO2

On the left side, we have 1 S atom and 2 O atoms. On the right side, we have 1 S atom and 2 O atoms.

The equation is already balanced with 1 S atom and 2 O atoms on both sides.

5. Na2O + H2O = NaOH

On the left side, we have 2 Na atoms and 1 O atom. On the right side, we have 1 Na atom, 1 O atom, and 1 H atom.

To balance the sodium (Na) atoms, we need to put a coefficient of 2 in front of NaOH:

Na2O + H2O = 2 NaOH

Now, the equation is balanced with 2 Na atoms, 1 O atom, and 2 H atoms on both sides.

6. NaOH + H2SO4 = Na2SO4 + H2O

On the left side, we have 1 Na atom, 1 O atom, 1 H atom, and 1 S atom. On the right side, we have 2 Na atoms, 1 S atom, 4 O atoms, and 1 H2O molecule (which contains 2 H atoms and 1 O atom).

To balance the sodium (Na) atoms, we need to put a coefficient of 2 in front of NaOH:

2 NaOH + H2SO4 = Na2SO4 + H2O

Now, the equation is balanced with 2 Na atoms, 1 S atom, 4 O atoms, and 2 H atoms on both sides.

Please note that these balanced equations are based on the given information and the principle of conservation of mass.