By Nik on Tuesday, October 24, 2000 - 11:54 am:
can you offer me a literature for the stability of the solutions used in the lab, like 0.1N HCl or 0.1N NaOH. Or it is the question of experience.
By misye on Tuesday, October 24, 2000 - 12:41 pm:
Stability of these mineral acids and bases is dependent on the inevitable buffering from dissolved atmospheric gases (primarily CO2).
The USP24 offers standardization procedures, but I would imagine even a freshman chemistry lab course would have a validated procedure for standardization.
Typically, if the atmosphere is controlled (inert gas) then the stability can be quite long. However, it is always best to test the stability yourself and have documentation showing that (e.g.1 week)is the re-standardization required date on your solution.
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