Practice Problem Answers

Back to Decomposition

Write correct formulas for the products in these decomposition reactions. #3 might be tough - remember to preserve nitrogen's oxidation number.

1) Ni(ClO3)2 ---> NiCl2 + O2

2) Ag2O ---> Ag + O2

3) HNO2 ---> N2O3 + H2O

4) Fe(OH)3 ---> Fe2O3 + H2O

5) Zn(CO3) ---> ZnO + CO2

6) Cs2CO3 ---> Cs2O + CO2

7) Al(OH)3 ---> Al2O3 + H2O

8) H2SO4 ---> SO3 + H2O

9) RbClO3 ---> RbCl + O2

10) RaCl2 ---> Ra + Cl2


Some teachers will include combustion as a type under decomposition. I have chosen to split it out as a separate type. However, you may want to double-check with your techer's plans on this point, especially if they have not mentioned it.