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1. Weigh 0,1 g of metyl orange on an analytical balance to the nearest o,oo1 g.
2. Dissolve o,1 g of methyl orange in approx. 80 mL of distilled water in a volumetric flask of 100 mL.
3. Maintain the flask 30 min in a thermostat at 20 0C.
4. Add water up to the mark.
5. Transfer the solurtion in a clean and dry bottle.
6. Join an adequate label on th bottle (name of the solution, concentration, date, operator).
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