What are the chemical properties of seawater?

sea water is mostly (~ 96.5%) water, but contains important amounts of soluted salts (~ 3.5%), which are mostly but not all, sodium chloride, which is identical to table salt. The unique chemical properties of seawater mean that it is a drastically different environment than the fresh water and many animals that live in it have never failed to live in fresh water. Types adapted to fresh water, such as fish in lakes with inland lakes in Africa, cannot survive in salt water. Sea water is about 2.5%denser than fresh water. uranium (0.00000001%) and gold (similar quantity). Different schemes for uranium extraction or gold from this water have been designed, but it was not economically viable. Fritz Haber, a German scientist of wines for his invention from the haber process and poison gas Zyklon spent the last years of his life and tried to come up with an effective way to get a large amount of gold from sea water so that Germany could repay its war debts. This effort savesMoznec, failed.

The origin of salts in seawater is both Earth and salts that were present on the ground surface when the first oceans were formed, which could be 100 million years after Earth. The theory that salts from rainwater outlet come with Sir Edmund Halley in 1715.

It is well known that seawater is dangerous for human consumption. Because it contains 3.5% salt and the human body strictly kechloride EPS sodium at 0.9% of blood according to the weight must spend additional water to dissolve excess salts. According to historical data on raft cruises, there is a chance of death for those who drink seawater, about 39%, while the chance of death for those who don't is only 3%. When it gets lost at sea, scientists recommend to drink it mixed with fresh water, in a 1: 2 ratio, slow water is slowly increasing. This is milder than the metabolic impact of the transition from fresh to pure saltou water and increase the likelihood of survival.