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From precipitation, filtration, decantation and evaporation which method is more effective?

2007-11-17 13:38:21 · 6 answers · asked by jamie 1 in Science & Mathematics Chemistry

6 answers

Filtration for an insoluble solid from a liquid. And Evaporation to get a soluble solid from a liquid.

2007-11-17 13:42:29 · answer #1 · answered by Barb Outhere 7 · 0 0

depends on what type of chemicals youre dealing with. if you already have an insoluble solid floating in a liquid, the solid will be in clearly visible chunks. generally the easiest way to collect them is to pour the liquid through a filter and collect the chunks.

if your solid is dissolved in solution (like salt in water), then there are a few things you can do depending on the molecule. sometimes you want to try to cause the solid to precipitate out of the solution by somehow altering it to change its interaction with the solvent. once you turn it solid, you can filter it. this isnt always possible, so another way you can try is to evaporate (or boil) your solution and leave your solid left behind. this works when your solvent boils at a lower temperature than the solid dissolved in it, so when youre liquid boils all the way off, you'll be left with just the solid in your beaker. there is another closely related process to this called distillation.

decantation is useful when dealing with biological molecules that you are trying to be gentle with. often, decantation works after you have put your mixed solution into a centrifuge and separated the components by density.

2007-11-17 13:47:01 · answer #2 · answered by Anonymous · 0 0

Filtration or decantation for an insoluble solid, evaporation for a soluble solid.

2007-11-17 13:42:22 · answer #3 · answered by RavenSierra 3 · 1 0

depends on how pure you want the solids you want to obtain, and the aim of purification Also the nature of the solids will determine how effective each method would be, for example if you wanted to seperate protein from a solution would be unwise to use evaporation as it may change its structure

2007-11-17 13:43:21 · answer #4 · answered by Anonymous · 0 0

evaporation and filtration.
filtration: solid from liquid
evaporation: liquid from liquid

2007-11-17 13:45:56 · answer #5 · answered by Anonymous · 0 0

hearth is a gasoline that outcomes from a chemical substitute. it incredibly is, a stable, liquid or gasoline will integrate with oxygen and launch capability, and in the technique will strengthen right into a clean gasoline with a different chemical makeup.

2017-01-05 17:29:54 · answer #6 · answered by ? 4 · 0 0

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