The Lazy Gas (2)

So, what was that lazy gas? And the answer is ..... ....... Argon. Why Argon? The Greek word 'Argos' means lazy and it was this word that gave rise to Argon. Argon is a noble gas - it doesn't react with anything (we all know that). It was 'discovered' by default. It was the remaining 1% of air that did not do anything (ie, did not react with anything) - so it was thought of as being lazy - and the name stuck!

MOF – 177

MOF - 177 has such an unassuming name. What is it though? A star? They have odd names like this don't they? Well no, MOF - 177 is a crystal with a huge (I mean huge) surface area - 4500 m2 per gram. To put this into context .... .... it is the equivalent of 17 tennis courts - per gram. By NielsF (Image:Tennis.png by ed g2s) [GFDL (http://www.gnu.org/copyleft/fdl.html), CC-BY-SA-3.0 (http://creativecommons.org/licenses/by-sa/3.0/) or CC BY-SA 2.5-2.0-1.0 (http://creativecommons.org/licenses/by-sa/2.5-2.0-1.0)], via Wikimedia CommonsThe crystal has a ...

Conclusion and Evaluation – aspect 1

  The theme for the next couple of days will be Conclusion and Evaluation (CEv). Aspect one is split into three parts and is, in my opinion, the hardest of all of the aspect to achieve a 'c' in. Firstly, the student needs to write a good IB level conclusion - what do the results actually mean. There is no longer a 'hypothesis' to write, so this is the part of IA that is really testing an understanding of chemical knowledge. Secondly, the student ...

Data Collection and Processing, aspect 1

By Tuesday, November 2, 2010 , , , , 0

Today, we will move away from Design and consider 'Data Processing and Presentation' (DCP) aspect 1. DCP is all about collecting raw data, displaying it and processing it. DCP aspect 1 deals with correctly and accurately presenting raw data. Data should be put into a table with a title. Any raw data collected can be split into qualitative (an observation - eg, I saw some bubbles) and quantitative (eg, 30.5 oC). Tables of data should contain both quantitative and qualitative observations to achieve a ...

Design Aspect 2

By Sunday, October 31, 2010 , , , , 0

  Sorry for the delay - I have been on my half term holiday :lol: So, my last posting covered Design, Aspect 1 - today, it is onto Design, Aspect 2. This criteria is all about controlling the variables listed in Design, Aspect 1 in the Method. Your students should cross reference their listed variables in Design, Aspect 1 and write how they will realistically control them. The most common mistake is writing something obscure in Design, Aspect 1 (for example, controlling the room ...

Design Aspect 1

  Today we will look at Design aspect 1. This criteria is really split into two parts - the research question and the variables. To obtain a 'c', the student needs to produce a focused research question. A research question along the lines of 'How does  concentration effect cell voltage?' would not be considered focused enough - this would be awarded a 'p'. A more focused question would talk about 'How do concentrations of 0.1, 0.2, .0.3, 0.4 and 0.5 mol dm-3 copper sulfate ...