Balancing chemical equations (KS3/GCSE) – Questions
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1. _O
2
+ _NH
3
-> _HNO
3
+ _H
2
O
2. _O
2
-> _O
3
3. _H
2
O
2
-> _H
2
O + _O
2
4. _Rb + _H
2
O -> _RbOH + _H
2
5. _Cl
2
+ _KBr -> _KCl + _Br
2
6. _N
2
+ _H
2
-> _NH
3
7. _NdF
3
+ _Ca -> _Nd + _CaF
2
8. _CH
4
+ _H
2
O -> _CO + _H
2
9. _C
2
H
5
OH + _O
2
-> _CO
2
+ _H
2
O
10. _Al + _Fe
2
O
3
-> _Fe + _Al
2
O
3
11. _HCl + _Ca(OH)
2
-> _CaCl
2
+ _H
2
O
12. _HNO
3
+ _CaCO
3
-> _Ca(NO
3
)
2
+ _CO
2
+ _H
2
O
13. _Al + _O
2
-> _Al
2
O
3
14. _P + _Cl
2
-> _PCl
3
15. _P
4
+ _O
2
-> _P
2
O
5
16. _POCl
3
+ _H
2
O -> _H
3
PO
4
+ _HCl
17. _PCl
5
+ _P
2
O
5
-> _POCl
3
18. _Fe
2
O
3
+ _H
2
-> _Fe + _H
2
O
Balancing chemical equations (KS3/GCSE) – Questions
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19. _P
4
O
6
+ _H
2
O -> _H
3
PO
3
20. _V
2
O
5
+ _HCl -> _VOCl
3
+ _H
2
O
21. _Fe + _H
2
O -> _Fe
3
O
4
+ _H
2
22. _C
3
H
6
+ _O
2
-> _CO + _H
2
O
23. _Ca
3
(PO
4
)
2
+ _C -> _Ca
3
P
2
+ _CO
24. _S
8
+ _O
2
-> _SO
3
25. _C
3
H
8
+ _O
2
-> _CO
2
+ _H
2
O
26. _CoO + _O
2
-> _Co
3
O
4
27. _C
3
H
6
O
2
+ _O
2
-> _CO
2
+ _H
2
O
28. _C
3
H
4
+ _O
2
-> _CO + _H
2
O
29. _LiH + _AlCl
3
-> _LiAlH
4
+ _LiCl
30. _Pb(NO
3
)
2
-> _PbO + _NO
2
+ _O
2
31. _Cu(CN)
2
-> _CuCN + _C
2
N
2
32. _PCl
3
+ _H
2
O -> _P(OH)
3
+ _HCl
33. _KBr + _Al(ClO
4
)
3
-> _AlBr
3
+ _KClO
4
34. _C
2
H
5
OH + _O
2
-> _CO + _H
2
O
35. _HCl + _MnO
2
-> _MnCl
2
+ _H
2
O + _Cl
2
36. _CrO
4
2-
+ _H
+
-> _Cr
2
O
7
2-
+ _H
2
O
37. _OH
-
-> _H
2
O + _O
2
+ _e
-
Balancing chemical equations (KS3/GCSE) – Questions
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38. _Fe
2
O
3
+ _CO -> _Fe + _CO
2
39. _H
3
PO
4
+ _BaO -> _Ba
3
(PO
4
)
2
+ _H
2
O
40. _MgNH
4
PO
4
-> _Mg
2
P
2
O
7
+ _NH
3
+ _H
2
O
41. _Al + _H
2
SO
4
-> _Al
2
(SO
4
)
3
+ _H
2
42. _P
4
O
10
+ _HCl -> _POCl
3
+ _HPO
3
43. _NO + _H
2
O + _O
2
-> _HNO
3
44. _Br
2
+ _NaOH -> _NaBr + _NaOBr + _H
2
O
45. _Ca
3
(PO
4
)
2
+ _H
3
PO
4
-> _Ca(H
2
PO
4
)
2
46. _FeSO
4
+ _K
3
[Fe(CN)
6
] -> _Fe
3
[Fe(CN)
6
]
2
+ _K
2
SO
4
47. _CuSO
4
+ _KCN -> _CuCN + _K
2
SO
4
+ _C
2
N
2
48. _CaHPO
4
.2H
2
O + _NaOH + _H
2
O -> _Na
2
HPO
4
.12H
2
O + _Ca(OH)
2
49. _MgNH
4
AsO
4
.6H
2
O -> _Mg
2
As
2
O
7
+ _NH
3
+ _H
2
O
50. _Mg
3
Si
2
O
5
(OH)
4
+ _CO
2
-> _MgCO
3
+ _SiO
2
+ _H
2
O
