GK
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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reactivity
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composition
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solubility
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None of the above
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Detailed explanation-1: -At 20 °C (68 °F) one liter of water can dissolve about 357 grams of salt, a concentration of 26.3% w/w. At boiling (100 °C (212 °F)) the amount that can be dissolved in one liter of water increases to about 391 grams, a concentration of 28.1% w/w.
Detailed explanation-2: -Sodium and chloride constitute 85 percent of the dissolved solids in sea water and account for the characteristic salty taste.
Detailed explanation-3: -The concentration of salt in seawater (salinity) varies with temperature, evaporation, and precipitation. Salinity is generally low at the equator and at the poles, and high at mid-latitudes. The average salinity is about 35 parts per thousand.
Detailed explanation-4: -The solubility of oxygen (dissolved oxygen) is dependent on salinity; as salinity levels increase, the amount of oxygen dissolved in the water decreases.