Prepare and standardize 01M sodium hydroxide solution and 01N Hydrochloric acid solution
Answer (1)
6th May, 2022
Hi,
Preparation of 100 mL of 1 N NaOH solution :-
Dissolve 4.5 g of sodium hydroxide in 100 mL distilled water, allow to cool, and then add saturated barium hydroxide solution drop wise with stirring until a precipitate is formed. Leave aside allowing for complete precipitation, filter, and collect the filtrate to be standardized against 1 N HCl solution.
Procedure :-
- Wash the burette with the D. W. and the titrant (NaOH)
- Fill the burette with NaOH to a level (adjust it)
- Wash a 20 mL – bulb pipette with D. W. then by a little of HCl solution; fill it to the mark with the acid
- Transfer the acid into a clean conical fask; add D.W. (50 mL)
- Add 2 drops of phenolphthalein indicator
- Start titration by adding NaOH solution drop wise with continuous stirring until the solution changes from colourless to pink
- Record the volume of NaOH solution used and calculate the normality.
Hope this helps.
Good luck.
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