[lilangel0072]

okay so i'm doing this project where my main topic is the effects of pH on the solubility/reaction of heavy metals in water....i want to do an experiment but i'm not sure how to...i was thinking maybe to actually take various samples of water with different pH and put metals in them and see which one dissolves or reacts better...but i'm not sure how i would test for it afterwards, i would need quantitative data....anyone have any ideas?

[ATMyller]

AAS analysis would be the easiest way. Other choices would be a complexometric titration (e.g. with EDTA and eriochrome black T) or precipitation/evaporation followed by gravimetric analysis.

[cliverlong]

okay so i'm doing this project where my main topic is the effects of pH on the solubility/reaction of heavy metals in water....i want to do an experiment but i'm not sure how to...i was thinking maybe to actually take various samples of water with different pH and put metals in them and see which one dissolves or reacts better...but i'm not sure how i would test for it afterwards, i would need quantitative data....anyone have any ideas?

Not sure if this would work

If you are looking to determine the solubility of heavy metals in water and solutions of varying pH.

How about

Take pure water measure electrical conductance / resistance,
weigh then add small sample of pure metal measure electrical conductance / resistance,
filter metal, dry, weigh and determine weight loss >> amount of metal dissolved in pure water (I am guessing not measureable)

Take acid samples of varying molarity, measure electrical conductance / resistance,
weigh then add small samples of pure metal to acid, measure electrical conductance / resistance,
filter metal, dry, weigh and determine weight loss >> amount of metal dissolved in acid
add "something" to acid solution (strong Alkali?) to return pH to 7 and weigh precipitate.


Clive