17. Solving a chemistry problem
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17. Solving a chemistry problem
206. From a weighed sample of steel, manganese was transferred to MnO4 and titrated with a 0.005 N solution of sodium oxalate Na2C2O4: MnO4 5C2O42 8H Mn 2 10 CO2 4H2O. Calculate the percentage of manganese in steel from the following potentiometric titration data:
Solution volume
Na2C2O4, ml 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0
E, mV 176 190 230 289 387 435 487 512
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