- in air with normal composition the oxygen partial pressure is 20% of the total pressure. Henry's Law The equation is normally written s = kH P, where s is solubility, kH is a constant that depends on the gas, solvent and temperature, and P is the partial pressure. Carbon dioxide (CO2) is more soluble in water than (O2). platinum and silver, more than twenty times its own volume of the gas being absorbed in the case of the latter metal; the dissolved gas is largely, but not completely, restored at the moment of solidification of the metal, and the phenomenon of … This little solubility of oxygen helps to sustain aquatic life. Ozone gas (O 3) is 13 times more soluble in water than O 2. The solubility of {eq}O_2 {/eq} in water is approximately 0.00380 g/L when the temperature is 25.0 degrees Celsius and the partial pressure of gaseous oxygen is 760 torr. Usually we hear of oxygen or dissolved O 2. Oxygen gas has a very poor solubility in liquid water, The solubility of oxygen in water increases with the increase of pressure but decreases on increaing temperature. Adequate dissolved oxygen is necessary for good water quality. It means that O 2 is soluble in water. Oxygen is a necessary element to all forms of life. The solubility of oxygen in water depends on many factors. Natural stream purification processes require adequate oxygen levels in order to provide for aerobic life forms. That oxygen is soluble at all can be explained on two grounds. Water that splashes over a rock, like in rapids, will have a larger surface area and is likely to contain more oxygen than still water. Solubility is the property of a solid, liquid, or gaseous chemical substance (called solute) to dissolve in a solid, liquid, or gaseous solvent. This results in 20% oxygen dissolution from air compared to pure oxygen. Under what conditions is oxygen gas most soluble in water a high pressure and from CHEM 1442 at University of Texas, Arlington Consequently, increasing temperature causes oxygen to become less soluble, and oxygen is more soluble in cold water. Note! Oxygen is also soluble in certain molten metals, e.g. That oxygen is weakly soluble can be explained, as you point out, on the basis of the hydrophobic effect, which amounts to saying that water likes to hydrogen bond, and an oxygen molecule is not very good at that compared to another water molecule. Oxygen is also more soluble in water with a lot of surface area. It has been shown that oxygen becomes more soluble in water as it gets colder. 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