From: NFetter@aol.com
Date: Tue Jan 09 2001 - 18:46:12 PST
From: NFetter@aol.com Message-ID: <dd.e9d539d.278d26f4@aol.com> Date: Tue, 9 Jan 2001 21:46:12 EST Subject: Re: Pinhole Digest #548 - 01/05/01
Hi Sally,
Calcium also burns readily in air. In fact, you can heat a small amount in
test, wathch it melt and then burn brightly. The compound formed is mostly
CaO with some Ca3N2 also forming.
If you heat mercuric oxide (HgO) it will decompose into oxygen gas and
mercury. If you do this reaction make sure it is done in a fume hood, bcause
the small amount of mercury vapor is very toxic. Also, calcium carbonate
(marble) can be heated to form solid CaO and carbon dioxide gas. This
reaction is a lot safer.
Neil Fetter
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