Why look for black precipitate at the butt instead of the surface...

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	Why look for black precipitate at the butt instead of the surface of an H2S test? By Anonymous Asked Oct 28 2009 8:58PM	5 Pts Rate Question

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by Anonymous on Oct 28, 2009 at 9:02 pm Permalink

A precipitate will usually sink to the bottom of the container the reaction took place in. +5

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Why look for black precipitate at the butt instead of the surface of an H2S test?

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