# Balancing Chemical EquationsPage 1

Slide 1

## Balancing Chemical Equations

Slide 2

CA Standards

Students know how to describe chemical reactions by writing balanced equations.

Slide 3

## Law of Conservation of Mass

In ordinary chemical reactions, the total mass of reacting substances is equal to the total mass of products

All atoms on the reactant side must appear on the product side, and in equal numbers

No new elements may appear

No elements may disappear

Slide 4

## Synthesis Reactions

1. _CaO + _H2O  _Ca(OH)2

2. _P4 + _O2  _P2O5

3. _Ca + _O2  _CaO

4. _Cu + _S8  _ CuS

5. _CaO + _H2O  _Ca(OH)2

6. _S8 + _O2  _SO2

7. _H2 + _N2  _NH3

8. _H2 + _Cl2  _HCl

9. _Ag + _S8  _Ag2S

10. _Cr + _O2  _Cr2O3

11. _Al + _Br2  _AlBr3

12. _Na + _I2  _NaI

13. _H2 + _O2  _H2O

14. _Al + _O2  _Al2O3

Slide 5

## Decomposition Reactions

15. _BaCO3  _BaO + _CO2

16. _MgCO3  _MgO + _CO2

17. _K2CO3  _K2O + _CO2

18. _Zn(OH)2  _ZnO + _H2O

19. _Fe(OH)2  _FeO + _H2O

20. _Ni(ClO3)2  _NiCl2 + _O2

21. _NaClO3  _NaCl + _O2

22. _KClO3  _KCl + _O2

23. _H2SO4  _H2O + _SO3

24. _H2CO3  _H2O + _CO2

25. _Al2O3  _Al + _O2

26. _Ag2O  _Ag + _O2

Slide 6

Decomposition Reactions

15. _BaCO3  _BaO + _CO2

16. _MgCO3  _MgO + _CO2

17. _K2CO3  _K2O + _CO2

18. _Zn(OH)2  _ZnO + _H2O

19. _Fe(OH)2  _FeO + _H2O

20. _Ni(ClO3)2  _NiCl2 + _O2

21. _NaClO3  _NaCl + _O2

22. _KClO3  _KCl + _O2

23. _H2SO4  _H2O + _SO3

24. _H2CO3  _H2O + _CO2

25. _Al2O3  _Al + _O2

26. _Ag2O  _Ag + _O2

Slide 7

## Single Replacement Reactions

27. _AgNO3 + _Ni  _Ni(NO3)2 + _Ag

28. _AlBr3 + _Cl2  _AlCl3 + _Br2

29. _NaI + _Br2  _NaBr + _I2

30. _Ca + _HCl  _CaCl2 + _H2

31. _Mg + _HNO3  _Mg(NO3)2 + _H2

32. _ Zn + _H2SO4  _ZnSO4 + _H2

33. _K + _H2O  _KOH + _H2

34. _Na + _H2O  _NaOH + _H2

Slide 8

Go to page:
1  2