ichemistry Posted December 16, 2009 Report Share Posted December 16, 2009 I figured we can use this thread to ask questions regarding chemistry! I'll start. What's the difference between "dissociation" and "soluble". If you get dissociated are you not soluble then? Also is Sb(OH)3 soluble? thanks! Link to comment Share on other sites More sharing options...
war485 Posted December 16, 2009 Report Share Posted December 16, 2009 hi and welcome to the forums! dissociation = molecule turns into ions soluble = "disappears" in water (or another given solvent) if it dissociates, it may not "appear to be soluble". Everything is soluble and dissociates to an extent, but it may not appear so. Also, dissociation doesn't mean it will be soluble, you could get precipitates. Sb(OH)3 ? Yeah, probably soluble in water. Looks reactive enough down there in the periodic table. Link to comment Share on other sites More sharing options...
The Ace of Spades Posted December 17, 2009 Report Share Posted December 17, 2009 You can also be soluble and not dissociate. Take, for example, glucose. It dissolves in water but does not dissociate into ions like sodium chloride. Link to comment Share on other sites More sharing options...
ichemistry Posted December 20, 2009 Author Report Share Posted December 20, 2009 someone please explain to me why higher level orbits in an atom have higher energy. I thought I understood it but now I am drawing a blank. Link to comment Share on other sites More sharing options...
orange123 Posted December 20, 2009 Report Share Posted December 20, 2009 someone please explain to me why higher level orbits in an atom have higher energy. I thought I understood it but now I am drawing a blank. I don't think we particularly have to know why higher levelorbits have higher energy, but I believe it has something to do with its stability. For instance, a higher energy orbital is less stable hence more reactive (think valence shell, which is very reactive). Thus, higher energy = more reactive, thus higher level orbitals = more energy. HTH Link to comment Share on other sites More sharing options...
The Law Posted December 21, 2009 Report Share Posted December 21, 2009 someone please explain to me why higher level orbits in an atom have higher energy. I thought I understood it but now I am drawing a blank. You don't have to understand why they're higher energy. But you just have to know that they are. If you're having trouble remembering it, then maybe this will help. An electron that has a high energy level is easily excited and can leave an atom relatively easily. It has enough energy to do so! HIGH energy = LEAVE easily. Now which elec. are more likely to leave easily? Electrons closest to an atom feel the "proton love" the most and therefore, find it more difficult to escape an atom so they have lower energy. Another way to think about it is considering it like potential energy. For gravitational potential energy, the further you are from the ground (PE=mgh), the more energy you have. Similarly, electrons in higher shells are FARTHER away from the nucleus so they have more energy. Hope that helps... it's not so important to know why, it's important to remember the rule though. Link to comment Share on other sites More sharing options...
C2U2 Posted January 2, 2010 Report Share Posted January 2, 2010 someone please explain to me why higher level orbits in an atom have higher energy. I thought I understood it but now I am drawing a blank. Higher PE when e- are farther away from the nucleus. Link to comment Share on other sites More sharing options...
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