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From: kaufman@Shasta.UUCP
Newsgroups: net.periphs,net.micro.pc
Subject: Re: adjusting PClone drives
Message-ID: <614@Shasta.ARPA>
Date: Sat, 14-Jun-86 15:38:07 EDT
Article-I.D.: Shasta.614
Posted: Sat Jun 14 15:38:07 1986
Date-Received: Tue, 17-Jun-86 10:25:31 EDT
References: <336@vu-vlsi.UUCP> <1860@gitpyr.UUCP> <9879@ucsfcgl.ucsfcgl.UUCP> <1017@dataioDataio.UUCP>
Reply-To: kaufman@Shasta.UUCP (Marc Kaufman)
Organization: Stanford University
Lines: 11
Xref: watmath net.periphs:1096 net.micro.pc:8679

In article <1017@dataioDataio.UUCP> bright@dataio.UUCP (Walter Bright writes:
>
>Laboratory alcohol is 98% pure (2% water). It is apparently impossible
>to eliminate that last 2% of water. Any chemists out there care to
>explain why?

I think the correct ratio is 95% alcohol (190 proof) to 5% water.  At
that point the partial pressures of alcohol vapor and water vapor are
such that further distillation does not change the ratio.  You can
get rid of the last water by adding sulphuric acid... should leave the
heads bright and clean too!