Business Requirements. Business requirements for a project are a series of needs that must be fulfilled to achieve a high-level objective. Clear business requirements help ensure that the end result of a project fulfills the stakeholders' needs. Functional Requirements.
Introduction. The solubility of aromatic hydrocarbons, such as toluene, in water, and the decrease in solubility in aqueous salt solutions is an important factor controlling the behavior of hydrocarbons in a variety of environments.. Variation of toluene solubility (expressed as C 0 / C salt, where C 0 =toluene solubility in distilled water, and C salt =toluene solubility in salt solution) versus salt concentration for various inorganic salts.
All four compounds in the table are roughly the same size, and all have moderate to excellent water solubility. The first two are simple carboxylic acids, and the third is an amino alcohol. All three compounds are soluble in organic solvents (e.g. ether) and have relatively low melting points. The carboxylic acids have pKa's near 4.5, and the conjugate acid of the amine has a pKa of 10. The simple amino acid alanine is the last entry. By contrast, it is very high melting (with decomposition), insoluble in organic solvents, and a million times weaker as an acid than ordinary carboxylic acids.