Solution is prepared by adding 18 mL of 0.200 M Fe(NO3)3and 2 mL of 0.0020 M KSCN. Calculate the initial concentrations of Fe3 and SCN-in the solution

Answer : The initial concentration of and in the solution are, 0.200 M and 0.0020 M respectively.

Explanation :  Given,

Concentration of = 0.200 M

Concentration of = 0.0020 M

As, 1 mole of   dissociate then it gives 1 mole of ion and 3 moles of ion.

So, 0.200 M of   dissociate then it gives 0.200 M of ion and (3×0.200 M) of ion.

and,

As, 1 mole of   dissociate then it gives 1 mole of ion and 1 mole of ion.

So, 0.0020 M of   dissociate then it gives 0.0020 M of ion and 0.0020 M of ion.

Thus, the initial concentration of and in the solution are, 0.200 M and 0.0020 M respectively.

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