Introduction.
One important property that organic compounds exhibit is that their structure is related to their solubility. Solubility is the amount of a substance that will dissolve in a given amount of another substance and is typically expressed as the number of parts by weight dissolved by 100 parts of solvent at a specified temperature and pressure or as percent by weight or by volume. The general rule used in determining whether a solute is soluble or insoluble in a given solvent is “like dissolves like” where nonpolar solutes dissolve in nonpolar solvents; polar solutes dissolve in polar solvents or chemical reactions may occur between the solvent and the solute causing dissolution.  Compounds that are branch-chained are more soluble than the corresponding straight-chained compound. Branching lowers intermolecular forces and decreases intermolecular attraction. The position of the functional group in the carbon chain also affects solubility. 
Methodology and materials:
Part 1 (water solubility):
150 mg (or 4 drops) are taken from each of following organic compounds: Propanol, Benzyl alcohol, 2- methylphenol, Di- n- butyl ether, Propanoic acid, Ethyl benzoate, n- propylamine, Analine and Benzamide. Each 150mg (or 4 Drops) of these compounds are added to separate test tubes, which contain 3 ml of water at room temperature.
Part 2 (acid- base solubility):
Four 4 drops of Benzyl alcohol and four drops of 2- methylphenol were added to separate test tubes contain 3 ml of 10% of NaOH solution. Then, 3 ml of 10% HCl s olution are placed in two-separated test tubes and then four drops of analine and benzamide are added to these two test tubes.
Part 3 (solubility and acid- base properties):
Five known samples are provided and they are M- cresol, Bromobenzen, Analine, Propanoic acid and Acetophenone.
Four drops from each sample are placed in a separate test tube filled with 3 ml of water. If the sample is soluble in water, litmus paper test is the second step….