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Re: acetic acid

George writes:

> I don't know about Australia, but in the US hydrochloric ("muriatic")
>  acid is available in almost every hardware store for cleaning up
>  concrete. It works about as well as sulfuric acid for purposes of
>  acidification, because one uses so little of it.

I recently did extensive testing with muriatic acid.  It will reduce buffering
agents such as carbonates to a degree, but for permanent pH changes, it is
ineffective.  It manages to gas off very quickly as hydrogen chloride.

Bob Dixon.