KSCN(aq) +Fe(NO3)3(aq) --> K+(aq) +FeSCN+2(aq) + NO3-(aq)...i want to add NaF to this solution...?

why does the colour change from a blood-red colour to an almost clean clear colour? ? ?

Answer:
The net equation is
Fe3+ (aq) + SCN- (aq) <-----> FeSCN2+ (aq)
color less... .. ... ....blood-red
The FeSCN2+ complex imparts a bood-red colour to a solution.
The concentration of FeSCN2+ in a solution can be determined with a spectrophotometer

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