5. Calculate the volume of 0.1 mol/l sodium hydroxide solution, which will be consumed for the titration of 0.2200 g (exactly weighed) of phthalazole when determining it by the alkalimetric method in dimethylformamide. The molecular weight of phthalazole is 403.4. The weight loss upon drying is 1%. The phthalazole content in terms of dry matter was 99.0%. Give equations for chemical reactions.
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