Water drops on the hydrophobic surface of grass. In chemistry, hydrophobicity is the physical property of a molecule (known as a hydrophobe) that is seemingly repelled from a mass of water. (Strictly speaking, there is no repulsive force involved; it is an absence of attraction.) In contrast, hydrophiles are attracted to water.
Ocean salinity is generally defined as the salt concentration (e.g., Sodium and Chlorure) in sea water. It is measured in unit of PSU (Practical Salinity Unit), which is a unit based on the properties of sea water conductivity. It is equivalent to per thousand or (o / 00) or to g/kg.
1 Salinity is approximately equal to the weight, in grams, of salt dissolved in 1000 g of seawater. 2  This would be the salt concentration in parts per thousand 3  (). Average ocean water has a salinity of 35.0. 4  This means that 1000 g of average seawater contains 965 g of water and 35 g of salts.t has roughly 2/3 the salt content of regular seawater. Ocean salinity (expressed in-per mil) is approximately equal to the weight, in grams, of salts dissolved in 1000g of seawater. This would be the salt concentration in parts-per-thousand ().