The Short Story:
Here’s a cheatsheet for qualitative salt analysis with all the common ions and tests included. I left out the ones which are generally not done at school, but in case you feel that I should include something, change any content, etc your suggestions are welcome.
The Long Story:
It’s a known fact that I don’t attend far too many classes at school; and I’m constantly in need of notes and such stuff from others. Having done this for quite a few years, I’ve got into a habit of creating ‘cheatsheets’ for referring to before exams, because I hardly remember anything any day. Take for example the chemistry practicals, almost all of which I didn’t attend last year (and only one of organic this year).
Thus, for today’s chemistry practical (which went sorta fine except I’m not sure of my cation), I made a reference sheet for qualitative salt analysis. I wouldn’t have done it, but the Web doesn’t seem to have any good stuff on this. The upshot was that I was working till 1.42 am typing out stuff that I dozed off at the computer table itself. I’d though it was a nice idea to do it, it’d help me remember the things too, but *argh*, those bloody subscript and superscript almost killed me.
This stuff is really useful for CBSE class 11 and 12 students, for the qualitative salt analysis practicals; and I guess for other folks interested in chemistry too. Feedback and suggestions for improvement are welcome.
Update 1: I made a cellphone version of the salt analysis cheatsheet too.
Update 2: The cheatsheet has been updated. It’s now been condensed to a four-page affair, and some useless footnotes have been removed. A few tips have been added towards the end. In case you’re (still) interested in the old one, download version 1 of salt analysis cheatsheet.
Update 3: Kartik Mankad has informed me of some possible discrepancies in the cheatsheet. I’ll repeat them from everyone’s benefit here – but I haven’t checked this out in a lab. There might be a few things I skipped because our teachers told us not to bother with them. Kartik’s given some nice tips though. Thanks!
- Sulphite, nitrite, and sulphide are not in CBSE course.
- As mentioned right under the heading of ‘cations’ it says, “When phosphate is detected cations of group 3 and later are absent”. This rule is violated for many salts, for example nickel phosphate.
- The procedure for ring test is mentioned wrong. Our teacher specifically said NOT to add HNO3 and use only H2So4.
- Under white flame.you may also add Pb salts, which give a bluish
- Deliquescence (the ability to absorb moisture) is a great tool in determining the salt/group. Example, Mg salts are HIGHLY deliquescent. MgCl2 makes the filter paper (on which it is kept) wet in minutes.