Posts tagged chemistry
Posts tagged chemistry
Ever wonder what $315,000,000,000 in gold bricks looks like? Thanks Boing Boing for the link.
White House Beer. Need I say more?
Two new elements have been named Flerovium and Livermorium. “The International Union of Pure and Applied Chemistry officially approved names for the elements - which sit at slot 114 and 116, respectively — on May 31. They have until now gone by the temporary monikers ununquadium and ununhexium.” (More at Wired.)
This three year old kid knows the names of more chemical elements than I do. Thanks Boing Boing for the link.
Someone asked Neil DeGrasse Tyson what the most astounding fact was…. I might have said something similar but not in the same amazing way that he has with words.
Got the link to the video via Akiva and Phil Plait.
How Do Batteries Work?
I had a request from an anon, so here goes. The first thing we need to know about batteries is that in essence what they’re doing is converting stored chemical energy into electrical energy. They do this by a series of reduction-oxidation reactions (redox). The first step involves the positively charged anode (anodes attract negatively charged ions called anions), at the anode electrons are moved from the electrolyte into the anode where they generate a voltage (which is a potential difference between energies at 2 points) and electromotive force. This is the oxidation step of the reaction. The electrolyte then converts into another compound or simply changes oxidation state. The electrons meanwhile go about their business and do whatever work they have to do before flowing into the cathode of the battery. At the cathode the corresponding reduction reaction occurs, quite separately to the oxidation component. Here electrons flow from the cathode into the second electrolyte which undergoes another chemical change. To complete the circuit some exchange of ions has to occur to make sure the flow continues, this is usually mediated by a salt bridge which connects the two electrolytes. Hope that helps!
Can I get the Au one please? hadron94:
A chemist’s christmas!
118 glass ornaments with each element etched on :)
Elements 110, 111, 112 have been officially named, and they are called Darmstadtium, Roentgenium, and Copernicium. The IUPAC has also started the process to name elements 114 and 116 Flerovium and Livermorium.