Water

• Water consists of 2 hydrogen atoms covalently bonded to one oxygen atom Mickey Mouse

• Polar Molecule - molecule with uneven charge

Properties of Water

• Adhesion - water molecules stick to solid surfaces graduated cylinder

• Cohesion - water molecules stick to other other water molecules

• Water has a high surface tension

• Capillary action - when water molecules move upward through narrow tubes

• Water has a high specific heat

• Constant temp 98.6

• Water expands when it freezes

• pH - a scale used to determine if an aqueous solution is an acid or a base (H+) (OH-) In pure water same amount

• Acid - donate H+ to solution

• Base - Substance that donates OH- or accept H+ to a solution, sometimes called alkaline, bleach, ammonia

• Buffers - Substances that minimize concentrations of H+ and OH- in a solution. Donate H+ when pH goes up and accept H+ when pH goes down.

Organic Chemistry

• Study of carbon based molecules

• Carbon is very versatile

• Hydrocarbons - Molecules that contain only carbon and hydrogen

• The simplest hydrocarbon is methane

• Isomer - Molecules with the same molecular formulas but different structural formulas.

• 3 types of isomers are : structural, geometric, enantiomers

• Structural isomers - Differ in the covalent arrangement of their atoms

• Geometric isomers - Covalent partnerships of atoms are the same, but differ in their special arrangement

• Enantiomers - Also called stereoisomers. Molecules that are mirror images.