1.

20 ml, 0.02M K2Cr2O7 is titrated with 10 ml solution of Fe2+ ion, then molarity of Fe2+ ion solution is __ x 10-2 M.

Answer»

Cr2O72- + Fe2+ → Cr3+ + Fe3+

Vf = 6   Vf = 1

Mili. eq. of Cr2O72- = 1[M x 10]

M = 24 x 10-2



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