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  H2SO4

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Author Topic:   H2SO4
Paul
A New Voice 		posted October 06, 1999 11:09 PM     Click Here to See the Profile for Paul   Click Here to Email Paul     
I obtained a drain cleaner that claimed to be 93% H2SO4. When I poured it into a beaker I noticed that it had a light brownish color. Then when I tried to heat it to increase the concentration the solution became darker and darker until it was almost a black opaque solution. Is it supposed to do that? What has this company added to it and is it still a useable form of concentrated H2SO4? I need it to make HNO3.

Oh, the brand is "Instant Power Guaranteed, Liquid Drain Opener"

nbk2000
Moderator 		posted October 07, 1999 02:02 AM     Click Here to See the Profile for nbk2000   Click Here to Email nbk2000     
The acid turned black because of organic material absorbed by the acid. When the acid is heated it breaks down the orgaincs into carbon. That's the stuff that darkens the acid. It's harmless and shouldn't affect anytghing you use it for explosively.

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