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Chemistry Related Articles

Understanding Volume Percent Concentration (v/v %) - 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, ...

Allergic Reaction to Tattoo Inks - 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 ....

This Day in Science History - September 7 - Friedrich Kekulé - 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 ...

Will We Run Out of Helium? - 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 ...

This Day in Science History - September 6 - John Macleod - 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 ...

How to Make Glowing Printer Ink - You can make homemade glowing ink that you can use in your printer to make glow in the dark letters, signs, or pictures. It's easy to do and works on ...

This Day in Science History - September 5 - Voyager 2 - On September 5, 1977 NASA launched the second Voyager space probe, Voyager 1. Voyager 2 was launched two weeks before, but due to the orbital mechanics and relative velocities, Voyager ...

AP Chemistry Study Guides - I got an email from a student who was finding AP chemistry to be frustrating and not as fun as the high school chemistry she took as a junior. That's ...

This Day in Science History - September 4 - Hans Zinsser - September 4th marks the passing of Hans Zinsser. Zinsser was an American virologist who built his career on the typhus fever. He traveled the world with the Red Cross investigating ...

Storm Glass Specifics - I've been getting questions and comments about the storm glass instructions, mainly pertaining to the chemicals, but also about sealing the container. Here's an email that pretty much covers everything: Dear ...