Chemistry detour…

Tuesday, March 31st, 2015 | EMILY HALL | No Comments

Chemistry

 

My next post was going to be on the chemistry behind the hot-can and I am part way through what I think is a neat little experiment/lesson involving this cool (or hot rather) invention. Today though, I was derailed by another Chemistry resource!

I’ve been a fan of MIT (Massachusetts Institute of Technology) open courseware for a while and I used snippets of it with classes and the OUASSA tutorials last year. I especially recommend their Highlights for High School where you can pick a topic and subtopic and be directed to a specific resource that may help you. Meaning for example, you don’t have to watch the whole lecture series on Classical Mechanics to help you in your struggles with Projectile Motion, the folks at MIT have pulled the relevant bits out of their screeds of material and collated it all for you. I must admit though to being so focussed on the Physics resources available, I was missing this little gem.

Chemistry Boot Camp is a multi episode show that follows 14 students as they go through a three week intensive lab course at MIT. The show is compelling for two reasons, first, it offers a glimpse into what life is like as a student at MIT and second, there is some really cool Chemistry going on. What I liked most about the show was that instead of just glossing over what the students were doing, there was an effort made to explain the Chemistry behind what they were doing and why.

The episodes are short – only 5 minutes ish in length and not counting the bonus episodes there are 11 in total, I managed to binge watch the entire series in a lunch break. A nice light Science meal to set up your afternoon.

 

 

Happy Birthday Alessandro Volta!

Tuesday, February 18th, 2014 | EMILY HALL | No Comments

VoltaHappy Birthday Alessandro Volta!! Who the heck was he you ask?  Well, the clue is in the name. The unit for electric potential, electric potential difference and emf are all Volts which comes from Volta. Volta made the Voltaic pile which in an improved form is known today as the battery!! Watch this cool movie from some lads at MIT to find out more about how he made this discovery.

Alessandro Volta Video

Once you’ve seen the video, look online for some pictures of the modern battery which, on the inside, all look much the same as the voltaic pile.

Finally, You can make your own voltaic pile at home using some copper/zinc coins alternated with some paper towel soaked in vinegar or lemon juice. You will need to use non NZ coins or old coins though as the current 10 cent piece is copper and steel! Also give the coins a sand to expose the zinc insides to the weak acid. Attaching your pile of 7 or so coins to an LED should bring forth light!! Of course you can always go the other route and get yourself a handy potato clock – same principle!

potatoClockpotatoClock2