Class 12 Chemistry Practicals Volumetric Analysis Estimation Of Oxalic Acid

Advanced Study Material for Class 12 Chemistry: Volumetric Analysis Estimation Of Oxalic Acid

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Ex.No: 04.   ESTIMATION OF OXALIC ACID
 
AIM:
 
To estimate the amount of Oxalic acid dissolved in 1250 ml of the given unknown solution volumetrically. For this you are given with a standard solution of HCl solution of normality
0.1010N and sodium hydroxide solution as link solution.
 
PRINCIPLE:
 
Neutralization of sodium hydroxide by HCl is given below.To indicate the end point, Phenolphthalein is used as an indicator
Class 12 Chemistry Practicals Volumetric Analysis Estimation Of Oxalic Acid
 
Neutralization of sodium hydroxide by Oxalic acid is given below.
To indicate the end point, Phenolphthalein is used as an indicator
Class 12 Chemistry Practicals Volumetric Analysis Estimation Of Oxalic Acid1
 
PROCEDURE:
 
TITRATION – I (Std HCl) Vs (link NaOH):
 
Burette is washed with water, rinsed with link HCl solution and filled with the same HCl solution upto zero mark. Exactly 20 ml of NaOH solution is pipetted out into the clean, washed
conical flask. To this solution 2 to 3 drops of phenolphthalein indicator is added and titrated against HCl solution from the burette. HCl is added drop wise till the pink colour disappears completely.
Burette reading is noted and the same procedure is repeated to get concordant values.
 
TITRATION – II: (Link NaOH) Vs (unknown Oxalic acid):
 
Burette is washed with water, rinsed with oxalic acid solution and filled with the same oxalic acid solution upto zero mark. Exactly 20 ml of NaOH solution is pipetted out into the clean, washed conical flask. To this solution 2 to 3 drops of phenolphthalein indicator is added and titrated against Oxalic acid solution from the burette. Oxalic acid is added drop wise till the pink colour disappears completely. Burette reading is noted and the same procedure is repeated to get concordant values.
 

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CBSE Class 12 Chemistry Study Material: Volumetric Analysis Estimation Of Oxalic Acid

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