Sodium Nitrite Solution Preparation
- Dissolve 7.5 g of sodium nitrite in 800 ml of purified water.
- Makeup with purified water to produce 1000 ml.
- Standardize the solution in the following manner.
Sodium Nitrite Solution Standardization
- Dissolve 0.3 g of Sulphanilamide in 50 ml of 2 M hydrochloric acid.
- Add 3 g of potassium bromide, cool in ice and titrate with the sodium nitrite solution determining the end-point potentiometrically.
- 1 ml of 0.1 M sodium nitrite is equivalent to 0.01722 g of Sulphanilamide.
- Calculate the molarity of solution by the following formula:
M = -------------------------------
NaNO2 in ml x 17.22
Also see: Determination of Shelf Life of Solutions in Laboratory
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