Timeline for Hot water and bacteria
Current License: CC BY-SA 3.0
9 events
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| Dec 18, 2014 at 14:28 | comment | added | Chris H | Another indirect but common example of a solid being more soluble at low temperatures is calcium carbonate, which is only weakly soluble in pure water but with carbon dioxide dissolved in the water the solubility increases. Remove the CO2 by heating (remember gas solubility decreases with increasing temperature) and the CaCO3 precipitates out. | |
| Dec 18, 2014 at 10:10 | history | edited | tel | CC BY-SA 3.0 |
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| Dec 18, 2014 at 9:07 | comment | added | David Richerby | @user3790338 Just Google "sodium sulphate solubility". One example is the curve at Wikipedia which shows decreasing solubility from 38C to about 120C (presumably under enough pressure to keep the water liquid at those temperatures). | |
| Dec 18, 2014 at 5:06 | comment | added | Stefan | 2012books.lardbucket.org/books/… The curves with a negative slope are the examples you seek. | |
| Dec 18, 2014 at 5:03 | comment | added | user2813274 | @DavidRicherby I would also like to see any source for a solid dissolving better in cold water | |
| Dec 18, 2014 at 3:59 | comment | added | tel | @DavidRicherby I changed the wording a little to reflect your comments, but I am curious about what you said. Do you have a reference? | |
| Dec 18, 2014 at 3:57 | history | edited | tel | CC BY-SA 3.0 |
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| Dec 17, 2014 at 17:00 | comment | added | David Richerby | "Everything that can dissolve in water dissolves more easily in hot water than cold water." That's not actually true. Gasses are much more soluble in cold water but even some solids, such as sodium sulphate dissolve better in cold water. (I concede that the removal of adsorbed gasses and sodium sulphate are not major factors in hand-washing. :-) ) | |
| Dec 17, 2014 at 0:49 | history | answered | tel | CC BY-SA 3.0 |
