Introduction to Inorganic Compounds
CORE
1 Identify and draw the structures of methane, ethane, ethene and ethanol.
2 State the type of compound present, given a chemical name ending in -ane, -ene and -ol, or a molecular structure.
SUPPLEMENTARY
3 Describe the concept of homologous series of alkanes and alkenes as families of compounds with similar properties.
4 Name, identify and draw the structures of the unbranched alkanes and alkenes (not
cis-trans), containing up to four carbon atoms per molecule.
P1 Identify and draw the structures of methane, ethane, ethene and ethanol.
Methane
(Hydrogen:4 Carbon:1)
Ethane
Ethene
Double bonded. 2 Carbon, 4 hydrgon C2H4
Ethanol
2 State the type of compound present, given a chemical name ending in -ane, -ene and -ol, or a molecular structure.
3 Describe the concept of homologous series of alkanes and alkenes as families of compounds with similar properties.
Alkanes form a homologous series,with the general formula CnH2n+2
Homologous means that they have similar properties and structure, differing only in the number of CH2 units.
Members in the same homologous series see a change in physical properties , for example, the boiling point increases and the chain becomes longer.
Same applies to alkenes, with the difference that Alkenes have the general formula CnH2n
4 Name, identify and draw the structures of the unbranched alkanes and alkenes (not
cis-trans), containing up to four carbon atoms per molecule.
If all the carbon atoms of the molecule are in one continuous chain, it is referred to as unbranched or linear.
PENTANE: unbranched.
–Propane
-Butane
