Performing a Finkelstein reaction with a benzosulfonate ester. 

What is the Finkelstein reaction? Finkelstein Reaction is a HalEx (Halogen Exchange) reaction what lets to change a bromine or chlorine to an iodine atom on an organic molecule. The trick is, that sodium iodide is well soluble in acetone, while the sodium chloride and sodium bromide is nearly insoluble. What happens is simple: R-X + NaI = R-I + NaX. The reaction is based on an equilibrium what only goes one direction, since the NaX gets removed from the reaction since it precipitates.

So why I am using a benzosulonate ester? It acts similarly to a bromide/chloride/halogen and it also does the reaction, the only difference that it has a much higher molecular weight, so it’s not as volatile as a bromide, while the iodide what is produced, could be distilled out easily from the reaction mixture. And also another short note: I use another solvent than acetone, since the acetone would also distill out with those conditions. 

I want to start a new studyblr trend.

Sometimes when I’m giving advice about specific classes I have taken, I think to myself, “Ugh, I wish I had someone to warn me about this before I took this so I would have been better prepared!” I always ask students who took the class in previous years how they studied but most people tend to be very vague about their study habits. I know a lot of us, myself included, like attention to detail. We want to know inside and out what works and what doesn’t. Maybe a strategy that worked for you might not work for me, but learning what doesn’t work is arguably just as important as knowing what does.

So I propose we start a trend where everyone writes posts on how to study for past classes they’ve taken. The more specific to a certain class, the better, but general posts can be helpful, as well.

I’m going to add a page to my blog with links to study tips for specific classes I’ve taken. As of Spring 2015 that will include:

  • General Biology
  • General Chemistry
  • Organic Chemistry
  • Advanced Organic Chemistry
  • Biochemistry
  • Calculus
  • General Physics

So feel free to reblog to spread the word, but I think it might also be helpful to add a comment of what classes you would like to see tips on so others can see it and write something for you. Especially if it’s for classes that aren’t as popular. Tips for the labs that go along with these classes would also be helpful.

For example, I would like to see study tips for the following classes:

  • Fields and Waves
  • Modern Physics
  • Quantum Mechanics
  • Physical Chemistry
  • Analytical Chemistry
  • Inorganic Chemistry
  • Differential Equations

Feel free to add your own when you reblog!

I started a blog to keep track of subject-specific study posts: studyblrsubjects. Use the submit feature to send me links to your own posts you’d like me to reblog and categorize on there. It’s brand new so there’s not much on there right now, but keep it in mind.

Meet CourtneyVerna-Brown.

Courtney is 20 years old and from Upper Darby, Pennsylvania. She is a Chemistry Major and Dance Minor at West Chester University.

This is Courtney’s first year with the corps.

Before joining us at Spirit, Courtney did three years of outdoor/indoor with the Upper Darby Marching Royals as well as Indoor Drumline. While she was there, she also served at caption for both the indoor and outdoor season! Courtney has also worked with numerous local theater groups and high school stage productions as well as high school choirs, and homecoming dance battle choreographer/participant. Though she may have graduated, Courtney is still putting in time at her Alma Mater as their colorguard instructor.

When asked her favorite memory of the corps up to this point, she said, “the gut feeling that I made the right decision in coming to the camp in December”.

Courtney said she picked Spirit because she wanted to get back into the Marching Arts. She said she thought she missed her chance until she saw Spirit’s show in 2014 and knew that she wanted to work hard and be a part of something that special.

Fun Drum Corps quote: “I can touch my nose with my tongue!!!” –Anonymous

Follow Spirit of Atlanta for more Member Mondays and updates from the corps throughout the season!

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Check out chemistry grad students parody “Shake & Vent”

In fact, the discovery of the periodic table represents one of a multitude of multiple discoveries which most accounts of science try to explain away. Multiple discovery is actually the rule rather than the exception and it is one of the many hints that point to the interconnected, almost organic nature of how science really develops. Many, including myself, have explored this theme by considering examples from the history of atomic physics and chemistry.

— Eric Scerri writes on John Reina Newlands, one such example of a scientist who contributed greatly to the “multiple discoveries” in the development of the periodic system of elements. 

Image credit: John Reina Newlands. Public Domain via Wikimedia Commons.

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Science for kids - How to make microwave cupcakes - ExpeRimental #20

Make a cake in a microwave with our recipe, and do a science experiment for children.

Download the infosheet for more instructions, ideas and the recipe: http://bit.ly/MicroCakes_IS

Jo and her daughter Sally investigate the chemistry of cakes by making microwave mug cakes in this fun kitchen science experiment. They follow the recipe for the perfect cake, then investigate what happens if they try making the cakes without certain ingredients. This scientific approach reveals which ingredient does what to the cake. They discover how baking powder is needed to make a cake spongy, because of the carbon dioxide gas it produces; how an egg with its long chain-like molecules gives structure; and how oil coats the other ingredients to stop them drying out, leaving a nice moist cake.

Experimenting in the kitchen is a great way to get children thinking like scientists while they have fun, and make something delicious.

By: The Royal Institution.

Ramblings...

I am just in a bad mood, have been all weekend, but I am getting more and more annoyed that people on the internet don’t have a basic knowledge of chemistry. Here is an example… I saw a post that someone made saying that Subway puts dihydrogen monoxide in their bread and how that is a dangerous chemical used in nuclear power plants. With basic chemistry knowledge you would know that dihydrogen (two hydrogen molecules) monoxide (one oxygen molecule) is H2O, also known as… water. Which is used to make bread and it is used in nuclear power plants to cool the core. *sighs* I really should just stick to the acnl and movie review sections of the internet.

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SLOW MOTION: Water droplets explode off a geckos’ back

New research from scientists in Queensland, Australia, has revealed that geckos are so water-repellant that liquid explodes off them, taking dirt with it. This the first self-cleaning vertebrate ever found.

The process, known as ‘geckovescence’ involves tiny hair-like structures known as spinules.

Find out more over at James Cook University: http://bit.ly/1MPRJEt

By: Science Alert.