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Posted: Sun Dec 10, 2017 10:47 pm
by HanSitoy
Just for clarification, every time we use approximations, like in terms of determining pH, we have to justify it right?

Re: Approximations  [ENDORSED]

Posted: Mon Dec 11, 2017 10:43 am
by Chem_Mod
Hi, HanSitoy,
If Keq is very small, it is obvious why you are using the approximation (it would still be a good idea to mention it in your solution). However, if it is not very small, you should always justify it by using 5% rule at the end.