Doc Brown's Chemistry KS4 science GCSE/IGCSE Practice Revision Questions

Chemical Equation Revision Practice - Balanced SYMBOL EQUATIONS

Part 2b Writing and balancing symbol equation Question ANSWERS

The answers to the GCSE/IGCSE KS4 Science-Chemistry practice questions for the symbol equations for the reactions of acids with metals, oxides, hydroxides and carbonates and hydrogencarbonates

Spelling note: sulphuric acid = sulfuric acid, sulphate = sulfate, aluminium = aluminum (US)

1. Mg_(s) + 2HCl_(aq) ===> MgCl_2(aq) + H_2(g)

2. ZnO_(s) + H₂SO_4(aq) ===> ZnSO_4(aq) + H₂O_(l)

3. CaO_(s) + 2HNO_3(aq) ===> Ca(NO₃)_2(aq) + H₂O_(l)

4. CuCO_3(s) + H₂SO_4(aq) ===> CuSO_4(aq) + H₂O_(l) + CO_2(g)

5. Ca(OH)_2(s) + 2HCl_(aq) ===> CaCl_2(aq) + 2H₂O_(l)

6. Zn_(s) + H₂SO_4(aq) ===> ZnSO_4(aq) + H_2(g)

7. NH_3(aq) + HNO_3(aq) ===> NH₄NO_3(aq)

8. CuO_(s) + 2HCl_(aq) ===> CuCl_2(aq) + H₂O_(l)

9. MgCO_3(s) + 2HCl_(aq) ===> MgCl_2(aq) + H₂O_(l) + CO_2(g)

10. Mg(OH)_2(s) + H₂SO_4(aq) ===> MgSO_4(aq) + 2H₂O_(l)

12. Zn_(s) + 2HCl_(aq) ===> ZnCl_2(aq) + H_2(g)

13. MgO_(s) + H₂SO_4(aq) ===> MgSO_4(aq) + H₂O_(l)

14. MgCO_3(s) + H₂SO_4(aq) ===>MgSO_4(aq) + H₂O_(l) + CO_2(g)

15. Zn(OH)_2(s) + 2HCl_(aq) ===> ZnCl_2(aq) + 2H₂O_(l)

16. Mg_(s) + H₂SO_4(aq) ===> MgSO_4(aq) + H_2(g)

17. ZnO_(s) + 2HCl_(aq) ===> ZnCl_2(aq) + H₂O_(l)

18. CuCO_3(s) + 2HCl_(aq) ===> CuCl_2(aq) + H₂O_(l) + CO_2(g)

19. Ca(OH)_2(s) + H₂SO_4(aq) ===> CaSO_4(aq) + 2H₂O_(l)

20. 2Al_(s) + 6HCl_(aq) ===> 2AlCl_3(aq) + 3H_2(g)

21. CuO_(s) + H₂SO_4(aq) ===> CuSO_4(aq) + H₂O_(l)

22. ZnCO_3(s) + H₂SO_4(aq) ===> ZnSO_4(aq)+ H₂O_(l) + CO_2(g) 

23. Mg_(s) + 2HNO_3(aq) ===> Mg(NO₃)_2(aq) + H_2(g)

24. NaOH_(aq) + HCl_(aq) ===> NaCl_(aq) + H₂O_(l)

25. 2Al_(s) + 3H₂SO_4(aq) ===> Al₂(SO₄)_3(aq) +  3H_2(g)

26. MgO_(s) + 2HCl_(aq) ===> MgCl_2(aq) + H₂O_(l)

27. Na₂CO_3(aq) + 2HCl_(aq) ===> 2NaCl_(aq) + H₂O_(l) + CO_2(g)

28. 2NaOH_(aq) + H₂SO_4(aq) ===> Na₂SO_4(aq) + 2H₂O_(l)

29. Fe_(s) + 2HCl_(aq) ===> FeCl_2(aq) + H_2(g)

30. Fe_(s) + H₂SO_4(aq) ===> FeSO_4(aq) + H_2(g)

31. NH_3(aq) + HNO_3(aq) ===> NH₄NO_3(aq)

32. Na₂CO_3(aq) + H₂SO_4(aq) ===> Na₂SO_4(aq) + H₂O_(l) + CO_2(g)

33. Zn(OH)_2(s) + 2HCl_(aq) ===> ZnCl_2(aq) + 2H₂O_(l)

34. Mg(OH)_2(s) + 2HCl_(aq) ===> MgCl_2(aq) + 2H₂O_(l)

35. ZnCO_3(s) + 2HCl_(aq) ===> ZnCl_2(aq)+ H₂O_(l) + CO_2(g)

36. NaHCO_3(s) + HCl_(aq) ===> NaCl_(aq) + H₂O_(l) + CO_2(g)

37. NH_3(aq) + HCl_(aq) ===> NH₄Cl_(aq)

38. 2NH_3(aq) + H₂SO_4(aq) ===> (NH₄)₂SO_4(aq)

39. 2CH₃COOH + Ca ===> (CH₃COO)₂Ca + H₂

40. CaCO₃ + 2CH₃COOH ===> (CH₃COO)₂Ca + H₂O + CO₂ 

41. NaOH + CH₃COOH ===> CH₃COONa + H₂O

42. Mg(OH)₂ + 2CH₃COOH ===> (CH₃COO)₂Mg + 2H₂O

Keywords-phrases: balanced symbol equations 1. Mg(s) + 2HCl(aq) ===> MgCl2(aq) + H2(g) 2. ZnO(s) + H2SO4(aq) ===> ZnSO4(aq) + H2O(l) 3. CaO(s) + 2HNO3(aq) ===> Ca(NO3)2(aq) + H2O(l) 4. CuCO3(s) + H2SO4(aq) ===> CuSO4(aq) + H2O(l) + CO2(g) 5. Ca(OH)2(s) + 2HCl(aq) ===> CaCl2(aq) + 2H2O(l) 6. Zn(s) + H2SO4(aq) ===> ZnSO4(aq) + H2(g) 7. NH3(aq) + HNO3(aq) ===> NH4NO3(aq) 8. CuO(s) + 2HCl(aq) ===> CuCl2(aq) + H2O(l) 9. MgCO3(s) + 2HCl(aq) ===> MgCl2(aq) + H2O(l) + CO2(g) 10. Mg(OH)2(s) + H2SO4(aq) ===> MgSO4(aq) + 2H2O(l) 11. CuO(s) + 2HNO3(aq) ==> Cu(NO3)2(aq) + H2O(l) 12. Zn(s) + 2HCl(aq) ===> ZnCl2(aq) + H2(g) 13. MgO(s) + H2SO4(aq) ===> MgSO4(aq) + H2O(l) 14. MgCO3(s) + H2SO4(aq) ===>MgSO4(aq) + H2O(l) + CO2(g) 15. Zn(OH)2(s) + 2HCl(aq) ===> ZnCl2(aq) + 2H2O(l) 16. Mg(s) + H2SO4(aq) ===> MgSO4(aq) + H2(g) 17. ZnO(s) + 2HCl(aq) ===> ZnCl2(aq) + H2O(l) 18. CuCO3(s) + 2HCl(aq) ===> CuCl2(aq) + H2O(l) + CO2(g) 19. Ca(OH)2(s) + H2SO4(aq) ===> CaSO4(aq) + 2H2O(l) 20. 2Al(s) + 6HCl(aq) ===> 2AlCl3(aq) + 3H2(g) 21. CuO(s) + H2SO4(aq) ===> CuSO4(aq) + H2O(l) 22. ZnCO3(s) + H2SO4(aq) ===> ZnSO4(aq)+ H2O(l) + CO2(g)  23. Mg(s) + 2HNO3(aq) ===> Mg(NO3)2(aq) + H2(g) 24. NaOH(aq) + HCl(aq) ===> NaCl(aq) + H2O(l) 25. 2Al(s) + 3H2SO4(aq) ===> Al2(SO4)3(aq) +  3H2(g) 26. MgO(s) + 2HCl(aq) ===> MgCl2(aq) + H2O(l) 27. Na2CO3(aq) + 2HCl(aq) ===> 2NaCl(aq) + H2O(l) + CO2(g) 28. 2NaOH(aq) + H2SO4(aq) ===> Na2SO4(aq) + 2H2O(l) 29. Fe(s) + 2HCl(aq) ===> FeCl2(aq) + H2(g) 30. Fe(s) + H2SO4(aq) ===> FeSO4(aq) + H2(g) 31. NH3(aq) + HNO3(aq) ===> NH4NO3(aq) 32. Na2CO3(aq) + H2SO4(aq) ===> Na2SO4(aq) + H2O(l) + CO2(g) 33. Zn(OH)2(s) + 2HCl(aq) ===> ZnCl2(aq) + 2H2O(l) 34. Mg(OH)2(s) + 2HCl(aq) ===> MgCl2(aq) + 2H2O(l) 35. ZnCO3(s) + 2HCl(aq) ===> ZnCl2(aq)+ H2O(l) + CO2(g) 36. NaHCO3(s) + HCl(aq) ===> NaCl(aq) + H2O(l) + CO2(g) 37. NH3(aq) + HCl(aq) ===> NH4Cl(aq) 38. 2NH3(aq) + H2SO4(aq) ===> (NH4)2SO4(aq) 39. 2CH3COOH + Ca ===> (CH3COO)2Ca + H2 40. CaCO3 + 2CH3COOH ===> (CH3COO)2Ca + H2O + CO2  41. NaOH + CH3COOH ===> CH3COONa + H2O 42. Mg(OH)2 + 2CH3COOH ===> (CH3COO)2Mg + 2H2O

Original Symbol Equation Questions

Chemical equations are an important part of the 'language' of chemistry and will form part of many chemistry lessons planned by your teacher, so get used to them and know how to write them as an important part of revising for KS4 Science-CHEMISTRY examinations.

Revision for KS4 Science IGCSE/O level/GCSE Chemistry Information Study Notes for revising for AQA GCSE Science, Edexcel GCSE Science/IGCSE Chemistry & OCR 21stC Science, OCR Gateway Science, CCEA/CEA GCSE science-chemistry, WJEC GCSE science-chemistry (revise courses equal to US grades 9-10) but even advanced level students need to know the contents of this page. for revising science chemistry courses revision guides

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