32. (1) A sample of the sample containing a mixture of

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32. (1) A sample of the sample containing a mixture of amines and indifferent impurities weighing 0.0250 g was dissolved in anhydrous acetic acid and titrated with acetic acid solution of 0.08000 M HClO4. Build a titration curve and calculate the mass fraction (%) of amines in the mixture.
Option 1
n-bromaniline, m-nitroaniline
Optical density of the solution after adding HClO4
V, ml 0.4 0.6 0.8 1.0 1.2 1.4 1.4 1.6 1.8 2.0 2.0 2.2 2.4
A 0.300 0.300 0.300 0.300 0.220 0.140 0.050 0.040 0.040 0.040 0.040

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