Storms at sea. The evaporated water falls back into the ocean with no net effect on salinity.
It is dissolved salts, gases, and nutrients that are presented in seawater.
Seawater is a mixture of various salts and water. Only six elements and compounds comprise about 99% of sea salts: chlorine, sodium, sulfur, magnesium, calcium and potassium. The relative abundance of the major salts in seawater is constant regardless of the ocean. Only the amount of water in the mixture varies because of differences between ocean basins because of regional differences in freshwater loss (evaporation) and gain (runoff and precipitation). The chlorine ion makes up 55% of the salt in seawater.
Answer a. Pure Water is not a mixture - it is a compound. Seawater is a mixture of water and salts, air is a mixture of gases and brass is a mixture (an alloy) of copper and zinc metals.
The concentration of salts in a solution can increase to the point of saturation. If heated, saturated solutions may become supersaturated by the addition of more salts. When cooled, crystallization of the salts in the solution may occur.
Water is actually a weak insulator and does not transmit current well unless it has ions in it, like saltwater does. Seaweeds are limited in their abilities to conduct electricity per se, but as they come from saltwater, the salts still present on their "leaves" conduct relatively well.
Precipitation, land water runoff and the melting of icebergs do not add salts to seawater.
Desalination. Desalination is the process of removing salts and minerals from seawater to make it suitable for consumption or agricultural use.
Volcanoes add various salts to seawater, primarily including sodium, potassium, calcium, magnesium, and chloride ions. These salts are released into the ocean through volcanic eruptions, where gases and ash interact with seawater, or through hydrothermal vents on the ocean floor. The high temperatures and pressures associated with volcanic activity can also lead to the leaching of minerals from surrounding rocks, further contributing to the salinity of seawater.
For example chlorine from submarine volcanoes, to form sodium chloride.
Dissolved salts are transported by the rivers.
When fresh water is removed from ocean water, the salts that are left behind are also a valuable resource. Over half of the world's supply of magnesium, a strong, light metal, is obtained from seawater in this way.
Minor organic salts make up less than 1% of the composition of seawater.
Salts are removed from seawater through a process called desalination. This can be done through various methods such as distillation, reverse osmosis, or electrodialysis. These methods help separate the salts from the water, resulting in fresh water that is suitable for consumption.
The process that contributes the most to the salts found in seawater is weathering and erosion of rocks on land. As rainwater, which is slightly acidic, flows over rocks, it dissolves minerals and releases ions such as sodium, chloride, magnesium, and calcium into rivers. These ions eventually reach the oceans, where they accumulate over time, contributing to the salinity of seawater. Additionally, hydrothermal vents and volcanic activity also contribute some salts, but the majority comes from terrestrial sources.
Seawater is hypertonic to drinking water. This means that seawater has a higher concentration of solutes (such as salts) compared to drinking water. Drinking seawater can lead to dehydration as the body would need to excrete more water to get rid of the excess salts.
Seawater is denser than freshwater because it contains dissolved salts and minerals, such as sodium and chloride, which add weight to the water molecules. These dissolved substances increase the overall mass of seawater and make it denser than freshwater.
Desalinization is the process of taking seawater and taking out all the salt in it so it's fit for human consumption.