I have a waste cupel as my sample, crush and grind to -100mesh. I have 2M, 3M, and 6M concentration. We observed that at 6M h2so4 has lower lead content than 3M. (I don't have the analysis for 2M). at lower concentration of sulfuric acid we observed that the flow of the solution(after the leaching) is more fluid and easy to filter than at higher concentration of sulfuric acid. My mentor suggested that maybe its because of the formation of lead sulfate. how can we prove this facts?
Dear Arellano
Your boss is right, not because he is boss.
The analytical method you should adapt over here is titration.
take a fixed synthetic lead solution and then keep on reacting with the variable concentration of sulphuric acid, give some equlibration time. then some settling time.
then either you can go for the sulphuric acid determination or lead sulphate determination.
it can be checked on the basis of stoichiometric level so exactly then how many sulphates are attached at variable concentration can be checked and then on the basis of the reacted or unreacted sulphate the comment can be made.
kindly update me on the progress.
regards
Rupesh
Dear John,
indeed it is important to know which analytical technique you used. PbSO4 is insoluble in diluted H2SO4, but soluble in conc. H2SO4 as Pb(HSO4)2.
