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GCSE Chemistry Notes: Answers to symbol equation questions
FOR PRINTING OUT Doc Brown's Chemistry KS4 science GCSE/IGCSE Practice Revision Questions Chemical Equation Revision Practice BALANCING SYMBOL EQUATION QUESTIONS 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 1b Word Equation Question Answers 2b Symbol Equation Question Answers
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 sulfuric acid makes a ... sulfate (...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 and for CH3COOM where M = Na, K and (CH3COO)2M where M = Mg, Ca, Cu, Zn. 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
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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