Moreno Posted February 6, 2017 Share Posted February 6, 2017 Which methods are best in water molecules dissociation to obtain OH- and H+ ? Lasers, microwaves, electric current? Which methods are most energy efficient to obtain as much as possible ions at a time? Which frequency have to be used? Link to comment Share on other sites More sharing options...
studiot Posted February 6, 2017 Share Posted February 6, 2017 Be careful what you wish for, lest it comes true. H+ is only a bookkeeping quantity in relation to water. Look here https://en.wikipedia.org/wiki/Hydronium (also calleed hydroxonium and here https://en.wikipedia.org/wiki/Hydrogen_ion Safety note Passage of electric current will only get you hydrogen and oxygen gas and a large bang if you are not careful. Specify your needs more thoroughly. Link to comment Share on other sites More sharing options...
John Cuthber Posted February 7, 2017 Share Posted February 7, 2017 Last time I checked, pulling molecules apart was usually thought of as chemistry. I'm also fairly sure that an arc in lowish pressure water vapour will produce H+ and OH- (Among a stack of other things) Link to comment Share on other sites More sharing options...
Moreno Posted February 20, 2017 Author Share Posted February 20, 2017 Is there any substance in which water can dissolve? Link to comment Share on other sites More sharing options...
John Cuthber Posted February 20, 2017 Share Posted February 20, 2017 Is there any substance in which water can dissolve? Yes, lots of things. The best known is probably alcohol, but also glycerine or sulphuric acid. Even things like gasoline will dissolve a little water. Link to comment Share on other sites More sharing options...
Moreno Posted February 20, 2017 Author Share Posted February 20, 2017 Yes, lots of things. The best known is probably alcohol, but also glycerine or sulphuric acid. Even things like gasoline will dissolve a little water. Are you sure that if we mix water and ethanol together, ethanol and not water would be a solvent? Link to comment Share on other sites More sharing options...
Bender Posted February 21, 2017 Share Posted February 21, 2017 (edited) It depends on the concentration. I guess the one with the highest concentration would be the solvent, but it is only semantics. Edited February 21, 2017 by Bender Link to comment Share on other sites More sharing options...
Moreno Posted February 22, 2017 Author Share Posted February 22, 2017 Is there any solid-state substance which can work as an efficient water solvent? Link to comment Share on other sites More sharing options...
John Cuthber Posted February 22, 2017 Share Posted February 22, 2017 On a cold day dimethylsulphoxide and acetic acid are solids but if you add water they become liquids.Which material dissolved which? Are you sure that if we mix water and ethanol together, ethanol and not water would be a solvent? If you do this at -10 C it's pretty clear that the liquid alcohol acts as a solvent for the solid ice. Link to comment Share on other sites More sharing options...
Moreno Posted February 22, 2017 Author Share Posted February 22, 2017 On a cold day dimethylsulphoxide and acetic acid are solids but if you add water they become liquids. Which material dissolved which? If you do this at -10 C it's pretty clear that the liquid alcohol acts as a solvent for the solid ice. No. I need some substance which stays solid in wide temperature range and remains solid on contact with water. Only water suppose to dissociate on contact with that substance. Link to comment Share on other sites More sharing options...
John Cuthber Posted February 22, 2017 Share Posted February 22, 2017 That's not a realistic goal. Water is fairly stable and doesn't dissociate. There are things (like sodium) that react with it. What are you trying to do? Link to comment Share on other sites More sharing options...
sethoflagos Posted March 5, 2017 Share Posted March 5, 2017 (edited) No. I need some substance which stays solid in wide temperature range and remains solid on contact with water. Only water suppose to dissociate on contact with that substance. Dissociating water requires an energy source. A block of tungsten heated to say 3,000K, will cause water molecules at and around its surface to dissociate until the system comes to thermal equilibrium and rates of dissociation/recombination equalise. The choice of tungsten is purely to meet your requirement for the agent to be a solid at temperatures where the degree of water dissociation is significant. EDIT: Okay reread the OP. Looking for ionic dissociation rather than H2 and O2. Hence off-topic (I think). Edited March 5, 2017 by sethoflagos Link to comment Share on other sites More sharing options...
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