albertlee Posted October 13, 2005 Share Posted October 13, 2005 How is oxygen dissolved in water?? Since oxygen is neutral, ie, formed by covalent bond, it shouldn't have any charge, right?? Link to comment Share on other sites More sharing options...
RyanJ Posted October 13, 2005 Share Posted October 13, 2005 How is oxygen dissolved in water?? Since oxygen is neutral' date=' ie, formed by covalent bond, it shouldn't have any charge, right??[/quote'] My guess is that the water molecules surround the Oxygen atoms, and slightly polarise as the slightly positive charge of Hydrogen ends of water molecule would attract electrons, thus leaving the other side of the Oxygen molecule slightly positive so the slightly negative parts of water molecules (the Oxygen) are attracted here. I'm not really shure though. Funny thing is that Oxygen if more soluable in cold water than hot water... Cheers, Ryan Jones Link to comment Share on other sites More sharing options...
jdurg Posted October 13, 2005 Share Posted October 13, 2005 Virtually ALL gases are more soluble in cold water than hot water. That's why we keep soda pop in the fridge. This is because gases dissolve as a result of very weak intermolecular forces between the gas and the water. Remember, electrons are NOT static creatures. They are constantly moving around the gas molecules resulting in partial charges forming here and there. These partial charges allow the gas to gain momentary attractions to the water molecules and allows it to dissolve in the water. At low temperatures, the water molecules aren't moving around as much so the gas molecules are constantly surrounded by the charged water molecules. In higher temperature water, the water molecules move around at a MUCH greater rate which cuts back on the amount of time the gas molecule is 'stabilized' by the polar water molecules. As a result, the solubility is not nearly as great. Link to comment Share on other sites More sharing options...
albertlee Posted October 13, 2005 Author Share Posted October 13, 2005 Virtually ALL gases are more soluble in cold water than hot water. That's why we keep soda pop in the fridge. This is because gases dissolve as a result of very weak intermolecular forces between the gas and the water. Remember, electrons are NOT static creatures. They are constantly moving around the gas molecules resulting in partial charges forming here and there. These partial charges allow the gas to gain momentary attractions to the water molecules and allows it to dissolve in the water. At low temperatures, the water molecules aren't moving around as much so the gas molecules are constantly surrounded by the charged water molecules. In higher temperature water, the water molecules move around at a MUCH greater rate which cuts back on the amount of time the gas molecule is 'stabilized' by the polar water molecules. As a result, the solubility is not nearly as great. but, why sugar dissolves better in warmer water? Link to comment Share on other sites More sharing options...
akcapr Posted October 13, 2005 Share Posted October 13, 2005 beacuse water molecules are moving faster thus more room to dissolve in Link to comment Share on other sites More sharing options...
jdurg Posted October 14, 2005 Share Posted October 14, 2005 Because sugar is not a gas and doesn't dissolve due to very weak van der waals forces. Link to comment Share on other sites More sharing options...
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