Question

На основе закона сохранения массы веществ расставить коэффициенты в данных уравнениях и указать тип реакций : 1. Al + O2 = Al2O3 2. Fe(OH)3 = Fe2O3+ H2O 3. SO3+ H2O = H2SO4 4. CuO + HCl = CuCl2+ H2O 5. Fe3O4+ H2 = Fe + H2O 6. P2O5 + H2O= H3PO4 7. Fe2O3+ Al = Fe + Al2O3 8. Au2O3 = Au + O2 9. Na + H2O= NaOH + H2 10. Ca + O2 = CaO​

Answer 1

Ответ: 4Al+O2=2Al2O3-соединения

2Fe(OH)3=Fe2O3+3H2O-разложения

SO3+H2O=H2SO4Соединения

CuO+2HCl=CuCl+H2OЗамещения

Fe3O4+8H2=3Fe+4H2O Размешения

2P2O5+3H2O=2H3PO4 Замещения

Fe2O3+2Al=2Fe+Al2O3 разложения

Объяснение:

Answer 2

Balancing Chemical Equations and Identifying Reaction Types

To balance the given chemical equations and identify the reaction types, we will apply the law of conservation of mass. This law states that in a chemical reaction, the total mass of the reactants is equal to the total mass of the products.

Let's go through each equation one by one:

1. 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 of the equation. - The balanced equation is: 4Al + 3O2 = 2Al2O3 - Reaction type: This is a synthesis reaction.

2. Fe(OH)3 = Fe2O3 + H2O - To balance this equation, we need to ensure that the number of atoms of each element is the same on both sides of the equation. - The balanced equation is: 2Fe(OH)3 = Fe2O3 + 3H2O - Reaction type: This is a decomposition reaction.

3. SO3 + H2O = H2SO4 - To balance this equation, we need to ensure that the number of atoms of each element is the same on both sides of the equation. - The balanced equation is: SO3 + H2O = H2SO4 - Reaction type: This is a synthesis reaction.

4. CuO + HCl = CuCl2 + H2O - To balance this equation, we need to ensure that the number of atoms of each element is the same on both sides of the equation. - The balanced equation is: CuO + 2HCl = CuCl2 + H2O - Reaction type: This is a double displacement reaction.

5. Fe3O4 + H2 = Fe + H2O - To balance this equation, we need to ensure that the number of atoms of each element is the same on both sides of the equation. - The balanced equation is: Fe3O4 + 4H2 = 3Fe + 4H2O - Reaction type: This is a redox reaction.

6. P2O5 + H2O = H3PO4 - To balance this equation, we need to ensure that the number of atoms of each element is the same on both sides of the equation. - The balanced equation is: P2O5 + 3H2O = 2H3PO4 - Reaction type: This is a synthesis reaction.

7. Fe2O3 + Al = Fe + Al2O3 - To balance this equation, we need to ensure that the number of atoms of each element is the same on both sides of the equation. - The balanced equation is: 2Fe2O3 + 4Al = 3Fe + 2Al2O3 - Reaction type: This is a redox reaction.

8. Au2O3 = Au + O2 - To balance this equation, we need to ensure that the number of atoms of each element is the same on both sides of the equation. - The balanced equation is: 2Au2O3 = 4Au + 3O2 - Reaction type: This is a decomposition reaction.

9. Na + H2O = NaOH + H2 - To balance this equation, we need to ensure that the number of atoms of each element is the same on both sides of the equation. - The balanced equation is: 2Na + 2H2O = 2NaOH + H2 - Reaction type: This is a redox reaction.

10. Ca + O2 = CaO - To balance this equation, we need to ensure that the number of atoms of each element is the same on both sides of the equation. - The balanced equation is: 2Ca + O2 = 2CaO - Reaction type: This is a synthesis reaction.

I hope this helps! Let me know if you have any further questions.