Objectives Define and give general equation for synthesis, decomposition, single-replacement, and double-replacement reactions. Classify a reaction as synthesis, decomposition, single-replacement, double-replacement, or combustion. List three types of synthesis reactions and six types of decomposition reactions. List four types of single-replacement reactions and three types of double-replacement reactions. Predict the products of simple reactions given the reactants.
Synthesis Reactions Also known as: composition reaction Defined as: two or more substances combine to form a new compound General Equation: A + X AX 3 Types Reactions of elements with Oxygen and Sulfur
Decomposition reactions Defined as: a single compound undergoes a reaction that produces two or more simpler substances. General Equation: AX A + X Most decomposition reactions only occur when energy in the form of electricity or heat is added. 5 Types Decomposition of binary compounds
Some chemical Reactions Reaction Between Na and Cl Reaction Between Aluminum and Bromine The Catalytic Decomposition of Hydrogen Peroxide, II
Single-Replacement Reactions Also known as: displacement reaction Defined as: one element replaces a similar element in a compound Many take place in aqueous solutions General Equation: A + BX AX + B Y + BX BY + X OR 4 Types Replacement of a Metal in a Compound by Another Metal
Double-Replacement Reactions Defined as: the ions of two compounds exchange places in an aqueous solution to form two new compounds. General Equation: AX + BY AY + BX One of the compounds formed is usually: Precipitate Gas that bubbles out of solution Molecular compound(usually water) 3 Types Formation of precipitates