Sulphuric Acid Solution Preparation
- Add slowly, with stirring, 30 ml of Sulphuric acid to about 800 ml of purified water.
- Makeup to 1000 ml with purified water.
- Allow cooling at 25°C.
Sulphuric Acid Solution Standardization
- Weigh accurately about 0.8 g of anhydrous Sodium Carbonate, previously heated at about 270°C for 1 hour.
- Dissolve it in 100 ml of water and add 0.1 ml of methyl red solution.
- Add the acid slowly from a burette, with constant stirring, until the solution becomes faintly pink.
- Heat the solution to boiling, cool and continue the titration.
- Heat again to boiling and titrate further as necessary until the faint pink color is no longer affected by continued boiling.
- 1 ml of 0.5 M sulphuric acid is equivalent to 0.05299 g of Na2CO3.
- Calculate the molarity of solution by the following formula:
M = -----------------------------
H2SO4 in ml x 52.99
Also see: Determination of Shelf Life of Solutions in Laboratory
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