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

Chemical Equation Revision Practice - Balanced SYMBOL EQUATIONS

Part 2a Writing and Balancing Symbol Equation Questions

GCSE/IGCSE KS4 Science-Chemistry examination ('exam') practice questions for the symbol equations for the for the reactions of acids with metals, oxides, hydroxides and carbonates and hydrogencarbonates

1a Word Equation Questions * 1b Word Equation Question Answers * 2b Symbol Equation Question Answers

(c) doc b Teach yourself to write equations!

(c) doc b GCSE/IGCSE Acids, Bases & Salts Notes * GCSE/IGCSE Multiple Choice BALANCING EQUATION QUIZ

GCSE/IGCSE KS4 Science-CHEMISTRY Revision Questions


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


You must know four general word equations, all of which involve neutralisation (Foundation or Higher students) and higher students would be expected to write and interpret them as symbol equations too. (i) is also a redox reaction.


(i) metal + acid ==> a salt + hydrogen

(ii) basic oxide or hydroxide + acid ==> a salt + water

(iii) carbonate + acid ==> a salt + water + carbon dioxide

(iv) ammonia + acid ==> ammonium salt (note: no water formed, but ammonia (NH3) is an alkaline gas and soluble in water and neutralised by acids to form ammonium salts (NH4 ...)

The name of the salt depends on (i) the metal name, which becomes the first part of salt name, and (ii) the acid e.g. H2SO4 sulphuric acid makes a ... sulphate (...SO4), HCl hydrochloric acid makes a ... chloride (...Cl), HNO3 nitric acid makes a nitrate (...NO3) and CH3COOH ethanoic acid makes an ethanoate (...OOCCH3 or CH3COO..).

'SOME' FORMULA HELP: for MO, M = Mg, Ca, Cu, Zn ;  for MOH, M = Na, K ; for M(OH)2, M = Mg, Ca, Cu, Zn; for MCO3, M = Cu, Zn, Ca, Mg ; for M2CO3 M = Na, K  ; and Al2O3, Al(OH)3, AlCl3, Al2(SO4)3, NH3, NH4, CH3COOM where M = Na, K and (CH3COO)2M where M = Mg, Ca, Cu, Zn.


2a SYMBOL EQUATION QUESTIONS

(you might have to supply balancing numbers in the equations and try to get the state symbols correct too!)

1. Mg(s) + ?__________________ ===> MgCl2(aq) + H2(g)

2. ZnO(s) + H2SO4(aq) ===> ?__________________ + H2O(l)

3. ?__________________ + 2HNO3(aq) ===> Ca(NO3)2(aq) + H2O(l)

4. CuCO3(s) + H2SO4(aq) ===> ?__________________ + H2O(l) + ?__________________

5. ?__________________ + 2HCl(aq) ===> CaCl2(aq) + 2H2O(l)

6. Zn(s) + ?__________________ ===> ZnSO4(aq) + H2(g)

7. ?__________________ + HNO3(aq) ===> NH4NO3(aq)

8. CuO(s) + 2HCl(aq) ===> ?__________________ + H2O(l)

9. ?__________________ + 2HCl(aq) ===> MgCl2(aq) + H2O(l) + ?__________________

10. Mg(OH)2(s) + H2SO4(aq) ===> ?__________________ + ?__________________

11. CuO(s) + ?__________________ ===> Cu(NO3)2(aq) + H2O(l)

12. Zn(s) + 2HCl(aq) ===> ZnCl2(aq) + H2(g)

13. ?__________________ + H2SO4(aq) ===> MgSO4(aq) + H2O(l)

14. ?__________________ + H2SO4(aq) ===> MgSO4(aq) + H2O(l) + CO2(g)

15. Zn(OH)2(s) + 2HCl(aq) ===> ZnCl2(aq) + ?__________________

16. Mg(s) + H2SO4(aq) ===> ?__________________ + ?__________________

17. ZnO(s) + 2HCl(aq) ===> ?__________________ + ?__________________

18. CuCO3(s) + ?__________________ ===> CuCl2(aq) + H2O(l) + ?__________________

19. ?__________________ + H2SO4(aq) ===> CaSO4(aq) + 2H2O(l)

20. 2Al(s) + ?__________________ ===> 2AlCl3(aq) + ?__________________

21. CuO(s) + ?__________________ ===> CuSO4(aq) + H2O(l)

22. ?__________________ + H2SO4(aq) ===> ZnSO4(aq)+ ?__________________ + CO2(g) 

23. Mg(s) + ?__________________ ===> Mg(NO3)2(aq) + H2(g)

24.?__________________ + ?__________________ ===> NaCl(aq) + H2O(l)

25. ?_Al(s) + ?__________________ ===> Al2(SO4)3(aq) +  3H2(g)

26. MgO(s) + ?__________________ ===> MgCl2(aq) + H2O(l)

27. Na2CO3(aq) + ?_HCl(aq) ===> ?______________ + ?____________ + ?______________

28. ?__NaOH(aq) + ?__________________ ===> Na2SO4(aq) + ?__H2O(l)

29. Fe(s) + ?__________________ ===> FeCl2(aq) + ?__________________

30. ?_______ + H2SO4(aq) ===> FeSO4(aq) + H2(g)

31. NH3(aq) + HNO3(aq) ===> ?__________________

32. Na2CO3(aq) + H2SO4(aq) ===> Na2SO4(aq) + ?__________________ + ?__________________

33. Zn(OH)2(s) + ?__HCl(aq) ===> ?__________________ + ?__H2O(l)

34. Mg(OH)2(s) + 2HCl(aq) ===> MgCl2(aq) + ?__________________

35. ZnCO3(s) + 2HCl(aq) ===> ?_______________+ ?_____________ + ?__________

36. NaHCO3(s) + HCl(aq) ===> ?______________ + ?_______________ + ?_______________

37. NH3(aq) + HCl(aq) ===> ?__________________

38. ?__NH3(aq) + ?__________________ ===> (NH4)2SO4(aq)

39. ?_CH3COOH + Ca ===> (CH3COO)2Ca + ?__

40. CaCO3 + ?_ _______ ===> (CH3COO)2Ca + ?___ + CO2 

41. NaOH + CH3COOH ===> ?________ + ?_____

42. Mg(OH)2 + 2CH3COOH ===> ?_________ + ?_ ?_____


Symbol Equation Question Answers

(c) doc b GCSE/IGCSE Acids, Bases & Salts Notes * GCSE/IGCSE Multiple Choice BALANCING EQUATION QUIZ

(c) doc b Teach yourself to write equations!


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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