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About Chemistry
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On This Day in Science History - September 10 - Waldo Semon
Fri, 10 Sep 2010 00:05:00 -0700
September 10th is Waldo Semon's birthday. Semon was an American chemical engineer who discovered the process to make vinyl from polyvinyl chloride or PVC. He was working for the BF...
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Make Potassium Chlorate from Bleach and Salt Substitute
Thu, 9 Sep 2010 11:16:00 -0700
Potassium chlorate (KClO3) is one of the most useful potassium compounds you can keep around the chem lab. It can be used as an oxidizer and disinfectant and to make...
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On This Day in Science History - September 9 - First Computer Bug
Thu, 9 Sep 2010 00:05:00 -0700
On September 9, 1947, Grace Hopper discovered the first computer bug. She was working as an operator on the Havard Mark II computer when the operators were attempting to trace...
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Drain Cleaner Can Dissolve Glass
Wed, 8 Sep 2010 09:33:00 -0700
Just about everyone knows many acids are corrosive. For example, hydrofluoric acid can dissolve glass (a chemical you do not want to mess with). Did you know strong bases can...
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This Day in Science History - September 8 - Willard Libby
Wed, 8 Sep 2010 00:05:00 -0700
September 8th marks the passing of Willard Libby. Libby was the American physical chemist who developed the carbon-14 dating method. This method is used to determine the age of 'once...
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Understanding Volume Percent Concentration (v/v %)
Tue, 7 Sep 2010 12:35:00 -0700
One of the simplest yet most confusing units of concentration is volume percent or volume-volume percent (v/v %). It is very easy to prepare a chemical solution using volume percent,...
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Allergic Reaction to Tattoo Inks
Tue, 7 Sep 2010 09:40:00 -0700
A while back I wrote a post about sensitivity reactions to red ink found in some tattoos. One of the comments written in response to that post caught my eye....
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This Day in Science History - September 7 - Friedrich Kekulé
Tue, 7 Sep 2010 00:05:00 -0700
September 7th is Friedrich August Kekulé von Stradonitz's birthday. Kekulé was a German theoretical chemist who figured out how carbon atoms could have a valence of 4 and join together...
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Will We Run Out of Helium?
Mon, 6 Sep 2010 11:04:00 -0700
Helium is the second-lightest element. Although it is rare on Earth, you likely have encountered it in helium-filled balloons. It's the most widely-used of the inert gases, used in arc...
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This Day in Science History - September 6 - John Macleod
Mon, 6 Sep 2010 00:05:00 -0700
September 6th is John Macleod's birthday. Macleod was a Scottish physician who shares the 1923 Nobel Prize in Medicine with Frederick Banting for the discovery of insulin.
The 1923 Medicine Prize...
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