Question

In: Chemistry

Fe(NO3)3+KSCN ---- FeSCN^2+KNO3 the assumption was made that all of the SCN^- which had been added...

Fe(NO3)3+KSCN ---- FeSCN^2+KNO3

the assumption was made that all of the SCN^- which had been added to the standard solutions had been converted to FeSCN^2+.

Is this assumption reasonable. Explain considering the initial concentration of SCN- relative to that of Fe3+ in each sample

soln

0.200M Fe(NO3)3

(ml)

0.00200M KSCN

(ml)

water

(ml)

FeSCN2+

(ml)

1 5.00 0.20 4.80 4x10^-5
2 5.00 0.40 4.60 8x10^-5
3 5.00 0.60 4.40 1.2x10^-4
4 5.00 0.80 4.20 1.6x10^-4
5 5.00 1.00 4.00 2.00x10-4

Solutions

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