Law of Conservation of Mass

Matter and Mass is neither created nor destroyed during a chemical reaction

Products in a chemical reaction must have the same mass as the reactants What I start with is what I finish with

Mass reactants = Mass products

Types of Chemical Equations

5 Types of Chemical Equations

1. Synthesis Reactions2. Combustion Reactions3. Decomposition Reactions 4. Single Replacement Reactions5. Double Replacement Reactions

1. Synthesis Reactions

Two or more substances (A and B) react to produce a single product (AB)

A + B ABReal life example = ?

2. Combustion Reactions

Oxygen combines with a substance and releases energy in the form of heat and light

CxHy+ O2 CO2 + H2O + light + heatReal life example = ?

3. Decomposition Reactions

A single compound breaks down into two or more elements or new compounds

AB A + BReal life example = ?

4. Single Replacement ReactionsThe atoms of one

element replace the atoms of another element

A + BX AX + BA metal can replace any

metal listed below it that is in a compound. It cannot replace any metal listed above it.

A more reactive halogen replaces a less reactive halogen

Real life example = ?

5. Double Replacement Reactions

An exchange of ions between two compoundsThey all produce either water, a precipitate,

or a gasAX + BY AY + BXReal life example = ?

Type of Reaction

Reactants Probable Products

Generic Equation

Synthesis Two or more substances

One compound A + B AB

Combustion •A metal and oxygen•A nonmetal and oxygen•A compound and oxygen

•The oxide of the metal•The oxide of the nonmetal•Two or more oxides

A + O2 AO

Decomposition

One compound Two or more elements and or compounds

AB A + B

Single replacement

•A metal and a compound•A nonmetal and a compound

•A new compound and the replaced metal•A new compound and the replaced nonmetal

A + BX AX + B

Double replacement

Two compounds Two different compounds, one of which is a solid, water or a gas

AX + BY AY + BX