A portion of sodium salicylate Opt30 M (C7H5O3Na) = 160,10 g

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30. A portion of sodium salicylate M (C7H5O3Na) = 160,10 g / mol weighing 0.0515 g was dissolved in glacial acetic acid and titrated photometrically tropeolin with indicator 00 at 540 nm on a photometer LMF-69, using as titrant 0.1000 M HClO4 in glacial acetic acid. Calculate the mass content (%) in the preparation of sodium salicylate on the titration results:
V (HClO4), ml 0.0 1.0 1.2 1.6 2.0 2.4 2.6 2.8 3.0 3.1 3.2 3.4 3.6 4.0 4 4
A 0.020 0.040 0.040 0.050 0.070 0.110 0.150 0.230 0.440 0.680 1.040 1.070 1.070, 1.070, 1.070

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