8.2 Notes - Types of Chemical Reactions
Monday, January 22, 2018
2:34 PM
_____________________________ - two or more substances combine
to form a new compound (direct combination)
metal + oxygen (O2) --> metal oxide
metal + sulfur (S8) --> metal sulfide
____________________________ - a single compound undergoes a
reaction that produces two or more simpler substances
Decomposition of a substance by an electric current is known as
electrolysis.
2H2O (l) --> 2H2 (g) + O2 (g)
Decomposition of acids --> nonmetal oxide + H2O
________________________________ - a reaction in which one
element replaces a similar element in a compound
Metal displacing another metal
Displacement of hydrogen (in water) by a metal --> metal hydroxide
+ H2
Halogen displacing another halogen
_________________________________ - the ions of two compounds
exchange places in an aqueous solution to form two new compounds
Formation of a precipitate
Formation of a gas
Formation of water (acid + base)
__________________________________ - a substance combines with
oxygen, releasing a large amount of energy in the form of light and heat
Formation of water and CO2
Practice:
Identify each type of reaction from the following chemical equations.
1. __________________ Na2SO4 + BaCl2 → BaSO4 + 2 NaCl
2. __________________ CaCO3 + 2 LiCl → Li2CO3 + CaCl2
3. __________________ Cl2 + Br2 → 2 BrCl
4. __________________ Mg + 2 HCl → MgCl2 + H2
5. __________________ 2 HgO → 2 Hg + O2