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1. Weigh the adequate quantity of the necessary substance (observe the indications: calcination, drying, etc.) .
2. Put this substance in a 1 L volumetric flask.
3. Add slowly approx. 200 mL distilled water and stir.
4. Put the flask in a thermostat at 20 0C and maintain for 1 hour.
5. Add distilled water up to the mark. Stir vigorously.
6. If necessary standardize the solution by titration following the suitable recommendations.
7. Transfer the solution in a bottle and apply a label (date, name of the operator, name of the solution, normality).
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