Types of Reactions What you need to know for the A.P. Chemistry Exam

Five Types of Reactions ( First Year Chemistry ) 1) Direct combination reaction (synthesis) A + B  AB A single product is formed from two or more reactants 2) Decomposition Reaction AB  A + B The reverse of a synthesis reaction. One reactant breaks into two or more products. YouTube - Elephant toothpaste

Five General Types of Reactions 3) Single Replacement Reaction A + BX  AX + B A single element (A) replaces another element (B) in a compound  A single element must be more reactive to replace another element. Use the Activity Series!

Five General Types of Reactions 4) Double Replacement Reaction AX + BY  AY + BX Two compounds switch partners and form two new compounds. 5) Combustion Reactions O 2 gas reacts with a flammable carbon compound to produce CO 2 and H 2 O C 2 H 5 OH + 3 O 2  2 CO H 2 O

What you need to know! The AP chemistry exam includes combustion reactions with organic molecules. Thus knowing the formula for a given organic molecule will help you write and balance the equation.

Hydrolysis Reactions A reaction where water is one of the reactants, and a larger molecule is split into two smaller molecules, one of which has the hydrogen from the water and the other has the OH group from the water. A specific case of the hydrolysis of an amide is the hydrolysis of peptides to smaller fragments or amino acids.

Examples of Chemical Reactions Chemical volcano – YouTube Reaction of iron with sulfur – YouTube Elephant toothpaste – YouTube Fire It Up - Combustion Reactions – YouTube Double Replacement with Precipitates - YouTube Double Replacement with Precipitates - YouTube