Question

1. Al2O3+HCI 2. Na,O + H20- 3. Fe + H2SO4 4. CaCO3- 5. Zn+CuSO4 6. BaCl2+K2CO3 → 7. CaO+CO- 8. Fe(OH)2 9. CO2+H20- 10. C+H2— 11. H20 12. Al + H2SO4 → 13. Na+02- 14. K2O+H20 15. Cu(OH)2+H2SO4- 16. Mg+H2CO3- 17. Al + O2- 18. Ca+ H20- 19. SO; + CO2 20. BaO + H2O- 21. P2O3 + H20- 22. CaO + P2O5 23. MgO + HCI-

Answer 1

1.Al203+6HCL=2AL(Cl3)+3H20

2Na2O+H2O=2NaOH

3.Fe+H2SO4=FeSO4+H2↑ какая у железа валентность???

4.CaCO3-CaO+CO2

5.Zn+CuSO4=ZnSO4+Cu

6. BaCl2+K2CO3 →BaCo3+2KCl

7. CaO+CO2-CaCo3

8. Fe(OH)2-FeO+H2O

9. CO2+H20-H2CO3

10. C+2H2—CH4

11. H20-H2+O2

12. Al + 3H2SO4 →Al(SO4)3+3H2↑

13. 2Na+02-Na2O

14. K2O+H20-2KOH

15. Cu(OH)2+H2SO4-CuSo4+2H2O

16. Mg+H2CO3-

17. 4Al + 3O2-2Al2O3

18.2 Ca+ H20-2CaO+H2↑

19. SO; + CO2-CS+O2

20. BaO + H2O-Ba(OH)2

21. P2O3 + H20-H3PO4

22. 3CaO + P2O5-Ca3(PO4)2

23. MgO + 2HCI-MgC2l+H2↑

Answer 2

1. Al2O3 + HCl - When aluminum oxide reacts with hydrochloric acid, it forms aluminum chloride and water. The balanced chemical equation for this reaction is: Al2O3 + 6HCl → 2AlCl3 + 3H2O

2. Na2O + H2O - When sodium oxide reacts with water, it forms sodium hydroxide. The balanced chemical equation for this reaction is: Na2O + H2O → 2NaOH

3. Fe + H2SO4 - When iron reacts with sulfuric acid, it forms iron sulfate and hydrogen gas. The balanced chemical equation for this reaction is: Fe + H2SO4 → FeSO4 + H2

4. CaCO3 - When calcium carbonate decomposes, it forms calcium oxide and carbon dioxide. The balanced chemical equation for this reaction is: CaCO3 → CaO + CO2

5. Zn + CuSO4 - When zinc reacts with copper sulfate, it forms zinc sulfate and copper. The balanced chemical equation for this reaction is: Zn + CuSO4 → ZnSO4 + Cu

6. BaCl2 + K2CO3 - When barium chloride reacts with potassium carbonate, it forms barium carbonate and potassium chloride. The balanced chemical equation for this reaction is: BaCl2 + K2CO3 → BaCO3 + 2KCl

7. CaO + CO2 - When calcium oxide reacts with carbon dioxide, it forms calcium carbonate. The balanced chemical equation for this reaction is: CaO + CO2 → CaCO3

8. Fe(OH)2 - Iron(II) hydroxide is formed when iron reacts with water.

9. CO2 + H2O - Carbon dioxide reacts with water to form carbonic acid. The balanced chemical equation for this reaction is: CO2 + H2O → H2CO3

10. C + H2 - When carbon reacts with hydrogen, it forms methane. The balanced chemical equation for this reaction is: C + 2H2 → CH4

11. H2O - Water is formed when hydrogen gas and oxygen gas react. The balanced chemical equation for this reaction is: 2H2 + O2 → 2H2O

12. Al + H2SO4 - When aluminum reacts with sulfuric acid, it forms aluminum sulfate and hydrogen gas. The balanced chemical equation for this reaction is: 2Al + 3H2SO4 → Al2(SO4)3 + 3H2

13. Na2O2 - Sodium peroxide is formed when sodium reacts with oxygen.

14. K2O + H2O - When potassium oxide reacts with water, it forms potassium hydroxide. The balanced chemical equation for this reaction is: K2O + H2O → 2KOH

15. Cu(OH)2 + H2SO4 - When copper hydroxide reacts with sulfuric acid, it forms copper sulfate and water. The balanced chemical equation for this reaction is: Cu(OH)2 + H2SO4 → CuSO4 + 2H2O

16. Mg + H2CO3 - When magnesium reacts with carbonic acid, it forms magnesium carbonate and hydrogen gas. The balanced chemical equation for this reaction is: Mg + H2CO3 → MgCO3 + H2

17. Al2O3 - Aluminum oxide is formed when aluminum reacts with oxygen.

18. Ca(OH)2 - Calcium hydroxide is formed when calcium reacts with water.

19. SO3 + CO2 - Sulfur trioxide reacts with carbon dioxide to form sulfur dioxide and carbonic acid.

20. BaO + H2O - When barium oxide reacts with water, it forms barium hydroxide. The balanced chemical equation for this reaction is: BaO + H2O → Ba(OH)2

21. P2O3 + H2O - When diphosphorus trioxide reacts with water, it forms phosphorous acid. The balanced chemical equation for this reaction is: P2O3 + 3H2O → 2H3PO3

22. CaO + P2O5 - When calcium oxide reacts with diphosphorus pentoxide, it forms calcium phosphate. The balanced chemical equation for this reaction is: 3CaO + P2O5 → Ca3(PO4)2

23. MgO + HCl - When magnesium oxide reacts with hydrochloric acid, it forms magnesium chloride and water. The balanced chemical equation for this reaction is: MgO + 2HCl → MgCl2 + H2O