NEET BIOLOGY

Detailed explanation-1: -Sea water salinity is expressed as a ratio of salt (in grams) to liter of water. In sea water there is typically close to 35 grams of dissolved salts in each liter. It is written as 35 ‰ The normal range of ocean salinity ranges between 33-37 grams per liter (33‰-37‰).

Detailed explanation-2: -The two ions that are present most often in seawater are chloride and sodium. These two make up over 90% of all dissolved ions in seawater. The concentration of salt in seawater (its salinity) is about 35 parts per thousand; in other words, about 3.5% of the weight of seawater comes from the dissolved salts.

Detailed explanation-3: -The term salinity refers to the amount of dissolved salts that are present in water. Sodium and chloride are the predominant ions in seawater, and the concentrations of magnesium, calcium, and sulfate ions are also substantial.

Detailed explanation-4: -The salinity of normal ocean water is about 35 parts per 1, 000, total dissolved solids. This is written as 35‰ or 35 ppth. A salinity of 35‰ is the same as 3.5%. The symbol resembles a percentage sign (%), but percent means per 100.