12. Titanium was transferred from a sample of the alloy weighing 0.6280 g to TiO2 and titrated with 0.10 N. CrCl2 solution. Calculate the percentage of titanium in the alloy from the following potentiometric titration results:
V CrCl2, ml 2.0 10.0 18.0 19.8 20.0 20.2 22.0
E, mV 159 100 41 ‒18 ‒155 ‒292 ‒351

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