1. Organic chemistry
5.3

2. Organic Compounds
Organic compounds contains carbon and usually hydrogen
“Organic” sounds like the compounds come from living things, but some do and some don’t.
Inorganic compounds are compounds that do not have carbon (as well as some exceptions: CO2, CO, and ionic carbonates

4. Why Carbon?
It has four electrons in its valence shell, which allows for more chemical bonding possibilities than any other element
Long chains of carbon have the possibility of forming
E.g. petroleum and plastics

5. Hydrocarbons organic compounds that contain only carbon and hydrogen.
All hydrocarbons are flammable, and most are liquids at room temperature
Hydrocarbons are based on a carbon “backbone”, or chain, with hydrogen atoms added on the sides.
The simplest hydrocarbon is methane (CH4), followed by ethane (C2H6), propane (C3H8), butane (C4H10), and pentane (C5H12)

6. In general, this is how we name HC’s
# of carbon atoms
Prefix
Hydrocarbon 1
Meth-
Methane 2
Eth-
Ethane 3
Prop-
Propane 4
But-
Butane 5
Pent-
Pentane

7. Alcohols are organic compounds with an -OH group off
of the carbon chain.
The simplest alcohols are methanol (CH3OH),
ethanol (C2H5OH) and isopropyl alcohol (C3H7OH).
Alcohols are very good solvents (they dissolve
other substances)
Alcohols are generally very flammable
You can remember by looking at the name: alCOHol.

8. Alcohols end in -ol

9. Ball-and-stick
P. 249
Once you’ve made one, draw it on the whiteboard. One partner builds, one partner draws. Then switch.

10. Homework
Do Recognizing organic and inorganic compounds in Workbook (somewhere around p. 85)
Do Checking Your Understanding (p251)
#3, 4 (a, c, e, g, i), 6, 7, 10 (a, c), 11 (all)