Saline water is generally present in the oceans and sea. The salinity of the saltwater is measured by different scientists, and the result of it they concluded that per liter of saltwater seawater contains about 35 grams of salt.
It is measured in parts per thousands ppt , thus meaning 35 ppt. Scientists have studied properties of saline or saltwater in which one of them is about their boiling and freezing point, which is both different than freshwater. As the main concern is related to the freezing point of the saltwater thus, it is lower than -2 C and may be lower than that.
This is because of the presence of salt content in the water. There is another property concerned with it that is the tonicity of the water, which is something related to the concept of osmosis.
The water moves through a semi-permeable membrane to the side where is a high solute concentration to make even the solution. Therefore, saltwater is a hypertonic solution and has to be consumed frequently to absorb water and eliminate salts by the organisms living there.
Freshwater is defined as the water that has a low salt concentration in it along with that it does not have any taste, odor, or color. The sources of freshwater can be divided into two types — the standing reservoirs like ponds, lakes, inland wetlands, and floating reservoirs like rivers, streams, etc. The organisms which cannot live in the extreme hot or extreme cold are found in freshwater. This means that there are 35 grams of salt dissolved in every liter of seawater.
The salinity lends itself to the other differences between ocean and freshwater and also poses a challenge for the organisms that thrive in saltwater. It is believed that the salt in ocean water comes from salt leaching out of the ocean floor as well as salt that is carried out of rivers and streams.
Saltwater is denser than freshwater due to the sodium chloride dissolved in it. This means that a specific volume of salt water is heaver than the same volume of freshwater. Warmer salt water is less dense than colder saltwater, which results in the colder water sinking to the ocean floor. While colder water is denser, when water freezes into ice, it becomes less dense and floats on the surface. Both the freezing and boiling points of ocean water differ from freshwater, but only the freezing point is of concern in nature.
The average freezing point for ocean water is -2 degrees Celsius, although it can be even lower than that if the salt content is higher or the water is under pressure. The typical freezing point for freshwater is 0 degrees Celsius. View full article. Sign in Don't already have an account? Personal Account. You could not be signed in. Please check your username and password and try again.
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