From: Paraluman Stice-Durkin (psticedurkin@punahou.edu)
Date: Mon Sep 03 2001 - 14:09:06 PDT
Message-ID: <000f01c134bc$ab1d3a80$68f91918@hawaii.rr.com> From: "Paraluman Stice-Durkin" <psticedurkin@punahou.edu> Subject: limewater Date: Mon, 3 Sep 2001 11:09:06 -1000
regarding limewater, i also read that the solution needs to sit for several
months before using it, i assume to assure saturation. but who plans that
far in advance? i usually make it a week beforehand and get fine results.
----- Original Message -----
From: "Pinhole Listserv" <pinhole@exploratorium.edu>
To: "Pinhole Listserv" <pinhole@exploratorium.edu>
Sent: Saturday, September 01, 2001 9:20 PM
Subject: Pinhole Digest #708 - 09/02/01
Pinhole Digest #708 - Sunday, September 2, 2001
- Learning Studio - week of August 26
by "Gilles Poitras" <gilles@exploratorium.edu>
Limewater
by "Andrew Coblentz" <acsl@mindspring.com>
Re: pinhole Limewater
by <NFetter@aol.com>
----------------------------------------------------------------------
Subject: - Learning Studio - week of August 26
From: "Gilles Poitras" <gilles@exploratorium.edu>
Date: Sat, 1 Sep 2001 09:51:40 -0700
Another busy week.
We did receive some new books which have been cataloged.
I won't report on them as they still lack spine labels and so are not
available for checking out. Expect to start hearing about them next week.
So once again here are some online resources that are not yet in the
Learning Studio catalog.
This time from the letter B.
Bay Area Watersheds Science Approach
http://www.sfei.org/watersheds/bawsa.pdf
Persistent Toxic Chemicals of Human Health Concern in Fish from SF Bay and
the Sacramento River, CA
http://www.sfei.org/rmp/posters/fishcontam/index.html
Biophysical Journal
http://www.biophysj.org/
Biophysics Textbook Online
http://www.biophysics.org/biophys/society/btol/
Bioscene--Journal of College Biology Teaching
http://papa.indstate.edu/amcbt/bioscene.html
Botanical Electronic News
http://www.ou.edu/cas/botany-micro/ben/
The Brain in Space
A Teacher's Guide with Activities for Neuroscience
EG-1998-03-118-HQ
http://spacelink.nasa.gov/Instructional.Materials/NASA.Educational.Products/
The.
Brain.in.Space
When we have a new cataloger in place I'll see to it that the items
reported this week and last are at the end of the list of items to be added
to the catalog. That way when I report on them in the future they will have
regained a little of their freshness.
Gilles Poitras gilles@exploratorium.edu
Learning Studio, Exploratorium Museum
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Subject: Limewater
From: "Andrew Coblentz" <acsl@mindspring.com>
Date: Sat, 1 Sep 2001 10:50:33 -0700
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I read an experiment which called for limewater. What is limewater? =
How can I make it or where can I buy it?
Thanks,
Andy Coblentz
acsl@mindspring.com
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<DIV><FONT face=3DArial size=3D2>I read an experiment which called for=20
limewater. What is limewater? How can I make it or where can =
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it?</FONT></DIV>
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<DIV><FONT face=3DArial size=3D2>Thanks,</FONT></DIV>
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Subject: Re: pinhole Limewater
From: <NFetter@aol.com>
Date: Sat, 1 Sep 2001 18:21:27 EDT
Hi Andy,
Lime water is a saturated solution of calcium hydroxide, Ca(OH)2. Since
calcium hydroxide is only slightly soluble is water, a little bit goes a
long
way. A tablespoon in a gallon of water will do the trick. You can also make
lime water from calcium oxide (quicklime) (CaO), but be careful, it will
attack skin and it generates a lot of heat energy when it is put in water.
Neil Fetter
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