What to do if you think you have found an error on Chemguide

Simple typing errors

I am always happy to correct these, however trivial they may be. Please just let me know what page a mistake is on, and whereabouts on the page it is.

If you think the chemistry is wrong

First of all, are you sure? Unless it is something fairly specialised, it is likely that anything wrong has already been pointed out to me and corrected. Most of the site has been online for between 4 and 14 years at the time of writing (January 2014).

In autumn 2013, site visits were running at more than 2 million a month, and it is fairly unlikely that everybody who has read the page so far has missed your possible error - but not impossible!

The pages of questions and answers haven't been online for so long, and it is more possible that there could be mistakes in these.

• If you are a student, please check first with your teacher to make sure that you aren't just misunderstanding something. If the problem was down to a misunderstanding which might be avoided if I rewrote a bit of a page, then I am happy to consider that.

  Please give me as much detail as possible as to why you didn't understand it first time.

  If your teacher agrees that there is an error, then please see below.

If you are sure there is a mistake

• Give me as much detail and supporting evidence as you can. If you think there is a mistake, tell me exactly where it is, why you think it is wrong, and give me some details of your supporting evidence - book or web references, for example.

• Tell me something about yourself. It is very hard to have any sort of discussion if I don't know your chemistry background. It obviously makes a difference whether you are a student just starting the subject, or a teacher, or a university professor. I don't need your life history, though!