Qualification > Sciences
CHEM AND BIO HELP AND TIPS HERE
mdwael:
--- Quote from: MasterMath on June 06, 2010, 02:57:54 pm ---Any metal Above Ca reacts to give a hydroxide and H2.. im talking about the order in reactivity series..
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I dont know the place for caesium and lanathium in the reactivity series
Adzel:
--- Quote from: ~VIN1094~ on June 06, 2010, 03:05:24 pm ---By the way you don;t have to know the structures.
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I saw this question in O/N 2002 03, Q 4 (ii) ::)
Ivo:
By the way, for some questions they ask how to concentrate something (eg aqeous ethanol). What does it mean, like add more acid to concentrate, or remove water?
Also, what does saturated solution mean? I don't mean the stuff about alkanes, the other definition.
WARRIOR:
link please :/
WARRIOR:
--- Quote from: Ivo on June 06, 2010, 03:18:03 pm ---By the way, for some questions they ask how to concentrate something (eg aqeous ethanol). What does it mean, like add more acid to concentrate, or remove water?
Also, what does saturated solution mean? I don't mean the stuff about alkanes, the other definition.
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you havae to evaporate the water (in case of ethanol i think u have to use fractional distillation )
sat solution means contains maximum amount of solute in a solvent( or maximum amoutn of dissolved material ) in a particulare temprature
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