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IB Approved Workshops
Chemistry (New Syllabus)
IB DP Category 2
Berlin, Germany, 23 - 25 August 2024
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Chemistry (New Syllabus)
IB DP Category 1
Online (IB Approved), 25 - 27 October 2024
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Easy, user friendly site that enables the teachers to easily access to a wealth of materials, questions, TOK, nature of science and exam questions.
Robert Macbeth
Institut Montana Zugerberg (Switzerland)
Quote of the day
In an examination those who do not wish to know ask questions of those who cannot tell.
Walter Alexander Raleigh, 1861-1922
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A useful chromatography resource from the RSC
The Royal Society of Chemistry has just published a useful resource for students that covers chromatography for the 16-18 year age group. It...
Progress in carbon capture?
This blog looks at a promising recent development which could lead to capturing carbon dioxide emissions from the combustion of fossil fuels...
Subscriber commentsSee all
- Hello Pete, Since the choice of an appropriate eluent is very much dictated by the polarity of the components in the mixture being separated by chromatography, and often eluents are composed of two or more solvents, it seems to me to have considerable...
- Hi Geoff, I'm trying to aid a student in focusing in on a suitable EE topic. We've ended up getting her onto: the effect of solvent composition (varying ratios of 2 solvents within a mixture) on the separation of pigments via paper/ thin-layer...
- Hello Austin, The question asks for the enthalpy of neutralization so the heat evolved is a step along the way to finding the answer which is why I kept it to four significant figures before giving the final answer to three significant figures....
- In question 1 I think you've rounded the answer twice. Once from 5684.8 to 5685, then again from 5685 to 5690. Wouldn't it be better to go from 5684.8 to 5680? Otherwise, I feel like the heat evolved should be quoted to three...