Decomposition Reaction
Decomposition reactions generally result from heating or passing
an electical current through a solution. Carbonates, chlorates and some oxides
decompose when heated. Electrolysis usually produces the elements.
Heating
CaCO3(s) --heat--> CaO(s) + CO2(g)
2KClO3(s) --heat--> 2KCl(s) + 3O2(g)
2HgO(s) --heat--> 2Hg(l) + O2(g)
2H2O2(aq) --heat--> 2H2O(l)
+ O2(g)
Electrolysis
2H2O(l) --electrolysis--> 2H2(g) +
O2(g)
MgCl2(s) --electrolysis--> Mg(s) +
Cl2(g)