Preparation and Standardization of 1 M Nitric Acid

Nitric Acid Solution Preparation

• Dilute 63 ml of nitric acid with sufficient water to produce 1000 ml.
• Standardize the solution in the following manner.

Nitric Acid Solution Standardization

• Dissolve 2 g of anhydrous sodium carbonate in 50 ml of water.
• Titrate with the nitric acid solution using methyl orange solution as indicator until the solution becomes reddish yellow. 
• Boil for 2 minutes, cool and continue the titration until the reddish-yellow color is restored.
• 1 ml of 1 M nitric acid is equivalent to 0.053 g of Na2CO3.
• Calculate the molarity of solution by the following formula:

            Na2CO3 in mg
M = --------------------------
           HNO3 in ml x 53
Also see: Determination of Shelf Life of Solutions in Laboratory