Welcome To Whitehall Township Whitehall Township is located in the center of the Lehigh Valley. The Township is one hour north of Philadelphia and an hour and half from New York City.
SALINITY OVERVIEW Salinity is the concentration of dissolved salts in water, usually expressed in parts per thousand (ppt). Objects float higher in salt water than fresh water because salt water is denser (heavier per unit of volume).
The commonest way to record salinity is to measure the amount of salt in 1000g of water, so it is referred to as âparts per thousandâ or ppt. Most of the ocean has a salinity of between 34ppt and 36ppt. Some properties of water are changed by having salt in it: 1  Salt makes seawater more dense than freshwater.here are many chemicals in seawater that make it salty. Most of them get there from rivers carrying chemicals dissolved out of rock and soil. The main one is sodium chloride, often just called salt. Most seawater has about 35g (7 teaspoons) of salt in every 1000g (about a litre) of water.