deposition of salt from evaporated water

papernuke

When a small volume, say 5ml, of saturated solution of NaCl is left on a flat surface and evaporates, why does the salt always become concentrated on the outer edge of the base where the solution was? Why doesn't it form a uniform distribution of salt throughout the entire area which the solution previously took?

sophiecentaur

It could be something to do with the temperature distribution over the surface (due to evaporation) or the rate of water movement where the liquid is more shallow - the outside edge being a bit more concentrated..

Similar discussions for: deposition of salt from evaporated water
Thread	Forum	Replies
Salt water and tap water conducting electricity - help appreciated :)	Classical Physics	7
Calculations of how much water evaporated and what is left	Biology, Chemistry & Other Homework	3
Questions on salt water vs fresh water....	General Physics	21
Water evaporated	General Physics	6
Fresh water eels adaptation to Salt water	Biology	4

papernuke	deposition of salt from evaporated water When a small volume, say 5ml, of saturated solution of NaCl is left on a flat surface and evaporates, why does the salt always become concentrated on the outer edge of the base where the solution was? Why doesn't it form a uniform distribution of salt throughout the entire area which the solution previously took?

sophiecentaur Recognitions: Gold Member Science Advisor	It could be something to do with the temperature distribution over the surface (due to evaporation) or the rate of water movement where the liquid is more shallow - the outside edge being a bit more concentrated..