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making sulphate ion visible

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m777182

m777182

Chemical
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Sep 1, 2003
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Does anybody know if there exist a compound that would, when applied over a surface, proved the presence of sulphate ion as colored spots?
m777182
 
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What is the surface?
A little more details please.
 
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Inert smooth ceramics covered with droplets of NaSO4 that were evaporated and left tinny crystals of said Na2SO4.
M777182
 
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Here are specific ion test strips for sulphate. They are available through most large chemical supply houses.
I don't have any of my quantitative chemistry books around and I don't know if there is any spot test for sulphate. The old quick and dirty method was to add a little barium chloride to a solution and look for a white precipitate.


 
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