Write skeleton equations from the following word equations AND balance them:◦ In water, iron (III) chloride reacts with sodium

hydroxide producing solid iron (III) hydroxide and sodium chloride

Daily ScienceDec 10

Types of Chemical Reactions

Pg. 63

When two elements combine to form one new compound

2 reactants single product◦ Can be single elements or compounds

A + B AB Ex. 2Na + Cl2 2NaCl Ex. CaO + H2O Ca(OH)2

Ex. 2SO2 + O2 2SO3

Synthesis reaction

When one compound breaks down to form two new products

Often require an energy source 1 reactant 2 products AB A + B Ex. 2NaN3 2Na + 3N2

Decomposition reaction

Oxygen combines with a substance (usually a organic compound also called hydrocarbons) to form water and CO2

Ex. CH4 + 2O2 2H2O +CO2

http://www.youtube.com/watch?v=LzagxjtZrJY

Combustion Reactions

Atoms of one element replace the atoms of another element

Not all metals react; use activity series list to predict reactivity

A metal can replace a metal that is below it on the a.s. but not above it (same for halogens)

AB + C CB +A Ex. 2Li + H2O 2LiOH + H2

Single replacement reaction

An exchange of ions between two compounds

AX + BY AY +BX Ex. 2NaOH + CuCl2 2NaCl + Cu(OH) Most double replacement reactions result in

the formation of a precipitate (a solid)

Double replacement

A catalyst is something that is used to speed up a chemical reaction

Can be heat, stirring, or another element or compound

It is written above the yields arrow Use delta (Δ ) to represent heat

Ex.

Catalysts

C3H8 + O2 CO2 + H2O Mg + Cl MgCl2 ZnSO4 + Mg MgSO4 + Zn LiBr Li + Br FeCl2 + MgS FeS + MgCl

Label the following types of reactions