Chemistry Coursework

Types of Chemical Reactions

1. Synthesis Reaction: a single compound forms from two or more reactants.

· N2 +3H2 ⇒ 2NH3

· _______(s) + _______(g) ⇒ _______ (s)

2. Replacement Reaction: an element of a compound is displaced by a more reactive element to form a new compound.

· 2Al(s) + 3CuCl2(aq) ⇒ 2AlCl3(aq) + 3Cu(s)

a. Single Displacement Reaction: when an ion in an ionic compound is replaced by a more reactive element or ion in aqueous solution. One of the products must be a solid, gas, or molecular compound (such as water).

i. 2Al(s) + 3CuCl2(aq) ⇒ 2AlCl3(aq) + 3Cu(s)

ii. _______ (aq) + ____ (s) ⇒ ____ (s) + ________ (aq)

b. Double-Displacement Reaction: when two compounds in aqueous solution appear to exchange ions. One of the products again must be a solid, gas, or molecular compound.

i. AgNO3(aq) + NaCl(aq) ⇒ AgCl(s) + NaNO3(aq)

ii. ____ (s) + __________ (s) ⇒ ________(aq) +______(s)

3. Combustion Reaction: a carbon-based compound reacts with oxygen to form (usually) carbon dioxide and water.

· C3H8 + 5O2 ⇒ 3CO2 + 4H2O

· __________ (g) + ______(g) → _____(g) + _____(g)

4. Decomposition Reaction: a single compound breaks down into two or more elements or simpler compounds.

· 2H2O(l) ⇒ 2H2(g) + O2(g)

· ________(l) ⇒ ______(l) + ______(g)

5. Acid-Base Reaction: an acid (H+ and an anion) reacts with a base (cation and OH-) to form water and a salt.

· HBr + KOH ⇒ H2O + KBr

· ____ (aq) + _____ (aq) ⇒_____ (l) +_____(aq)