I need to prepare a standardized Hydrochloric acid, 0.1 N ethanolic solution . What are the procedures? Is there a standard protocol for that?
Ph.Eur. describes how to make 1 M Hydrochloric acid in ethanol (4.1.1. Reagents - 1043506). It dont think they have a specific method for standardizing the solution, but you can most likely use a potentiometric titration with e.g. NaOH.
I am not aware of any standardized method for making HCL solutions. One can use the correct olarity of HCL but by adding the appropriate and accurate molar quantity ofacetyl choride. By adding this reagent one can generate HCL and in the ethanolic soution. The side products will be acetic acid and ethyl acetate.
After preparation or after you have added the exact volume HCl to enough water and diluted to the mark of the given or used volumetric flask, next thing is standardized, if it is required.
Standardization that i know is Correct with potentiometric titration against a Standard NaOH with almost within the same range in concentration. This standard NaOH may be available already ready to use with a known exact concentration like 0.1, or also standardized using sodium thiosulfate. This standard known value or concentration of standard NaOH and the amount prepared HCl solution consumed after titration will be used to calculate for the exact standard concentration or normality of the prepared HCl solution. The calculated concentration will be the exact concentration or normality HCl prepared.
Please just double check or validate this, for I am not at present doing this related things already. Go for quantitative chem books or Official Methods of Analysis to verify. Thank u I hope this help a bit.
- Badges
- Science topic
- Similar topics
- Chemistry