CH-1873

Titration calculations

Chemistry · Secondary 4 · Hard · Titration calculations

In an experiment, 2.50 g of an iron(II) salt is dissolved and all the

Fe^{2+}

is titrated with 0.0200 mol/dm³ acidified potassium manganate(VII). The equation is:

5Fe^{2+} + MnO_4^- + 8H^+ \rightarrow 5Fe^{3+} + Mn^{2+} + 4H_2O

.

If 18.0 cm³ of

MnO_4^-

is required, how many moles of

Fe^{2+}

are in the sample?

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