C iii. Why does AgSCN cause it to decrease?? (1 Viewer)

jazz519

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AgSCN is insoluble so the SCN-(aq) form no longer exists in the equilibrium at the same level as before. Therefore decrease in [SCN-(aq)] leads to equilibrium shifting left to minimise the change.

This causes an increase in [SCN-(aq)], [Fe3+] and a decrease in [FeSCN2+]. Therefore the colour is less red
 

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