Tag: Downloads

Way back, I had made a trigonometry cheatsheet for some of the more ‘advanced’ formulae that new students need. That was found quite useful by some people, but I thought it’s time I gave it a upgrade. Having used it for some time, and in no small measure to the feedback from other people, I’ve made a new version. It’s less cluttered, in the sense that redundant formulae have been done away with – for example, formulae which can be arrived at simply by replacing ‘+’ by ‘-‘ in a base formula have been removed; as have the half angle formulae (since it’s nothing but a form of the original double angle formulae). Another grouse was that when actually printed / photocopied (especially the latter), the text was far too faint to read. The new version thus is in bold typeface. Looks bad on screen, looks good on paper. Feedback is appreciated.

PS – In case you want the older one, you can also download Trigonometry Cheatsheet version 1.

Right after an update of the qualitative salt analysis cheatsheet (with all its analysis-y goodness in lesser number of pages), comes another useful one – for organic chemistry. I’d like to thank Rach for sending the base document in for this; but I did make a few changes to ensure that the test results were more foolproof.

Bear in mind that this is NOT a cheatsheet, it’s a flowchart; and therefore it doesn’t list all the tests for each type of organic compound. I feel it’s quite unnecessary, because it practicals, all you have to identify the damn thing, rest of the stuff which needs to be written in the paper can be obtained via, ahem, ‘collaboration with fellow beings’. 😉

Anyway, the whole idea of this flowchart is to give you a quick way to what your unknown organic compound is. Do bear in mind that you need to conduct the tests exactly in the order listed in the flowchart to minimize chances of error – because for many of these tests there are exceptions which need to be taken care of (and which I have).

Feedback / suggestions would be appreciated, either for this one, and / or the new version of the salt analysis cheatsheet.