Molecular Compounds:
- There are 7 Diatomic molecules: H2, N2, O2, F2, Cl2, Br2, I2
- There are 2 Polyatomic molecules: S8, P4
Rules for naming a molecular compound:
- Use the name of the first element
- Second element ends in -ide
- 1st atom usually does not have a prefix (Ex. NO -> Nitrogen monoxide)
- Hydrogen doesn't have a prefix (Ex. H2S -> Hydrogen sulfide)
- Some compounds are to be memorized:
IUPAC Name | Formula |
---|---|
Water | H20 |
Hydrogen Peroxide | H2O2 |
Ammonia | NH3 |
Glucose | C6H12O6 |
Sucrose | C12H22O11 |
Methane | CH4 |
Propane | C3H8 |
Octane | C8H18 |
Mathanol | CH3OH |
Ethanol | C2H5OH |
Naming Acids:
- Hydrogen compounds are acids (Ex. HCl -> Hydrochloric acid, H2SO4 -> Sulphuric acid)
- Hydrogen appears first in the formula unless it is part of a polyatomic group (Ex. CH3OOOH -> Acetic Acid)
- Classical rules use the suffix -ic and/or the prefix hydro- (Ex. Sulphuric acid, Hydrochloric acid)
- IUPAC system uses the aqueus hydrogen compound (Ex. HCl (aq) -> Aqueous Hydrogen Chloride)
Naming Bases:
- Cation and OH (Ex. NaOH, Ba(OH)2)
- Use the cation name followed by "hydroxide" (Ex. Sodium Hydroxide, Barium Hydroxide)
Some Acids and Bases:
Acid/Base | Compound |
---|---|
Hydrochloric Acid | HCl |
Nitric Acid | HNO3 |
Suphuric Acid | H2SO4 |
Phosphoric Acid | H3PO4 |
Acetic Acid | CH3COOH |
Ammonia | NH3 |
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