В9.12 A sample of steel with a mass of 1,1998 g was dis

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A sample of steel with a mass of 1,1998 g was dissolved, iron was transferred to Fe (II) and potentiometrically 1 M Ge (SO4) 2 was titrated. Construct the titration curve in coordinates and calculate the mass fraction (%) of iron in the alloy according to the data:
V (Ce (SO4) 2), ml ............ 2.00 10.00 18.00 19.80 20.00 20.20 22.00
E, mV .................................... 712 771 830 889 1110 1330 1390.

Additional information

The task from the textbook on Analytical Chemistry, vol.2, Vasiliev


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