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Re: True...
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True... ()

Bill Tindall, E.Tn.
I've heard siliceous rocks called acidic before, though the term is very old and no longer used much. Is silica actually acidic? yes and alumina rich rocks are basic.

It has to do with electron availability in regard to what chemistry can go on at the surface of these materials. It is nothing to do with hydrogen ions like one learns in elementary chem.

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