Reaction direction question:

[Mathman23]

Hi

Here is a reaction: Fe^(3+) + SCN^(-) <---> FeSCN^(2+)

If I add some extra KSCN to the above equilibrium reaction, in which direction will it react according to the law of chemical equilibrium?

Any hits?

Thanks for Your answer in advance.

Sincerely Yours
Fred
Denmark

 

[HallsofIvy]

No "hits" but here's a hint: If you add more KSCN it will dissolve and dissociate so there will be more SCN ion. Which way does the reaction go in order to reduce the excess SCN ion?

 

[wais]

Hi Fred,

Thank you for sharing this reaction with me. According to the law of chemical equilibrium, the reaction will shift towards the products side if there is an increase in the concentration of the reactants. In this case, adding extra KSCN will increase the concentration of the SCN^- ions, causing the reaction to shift towards the products side, resulting in an increase in the formation of FeSCN^2+ ions. I hope this helps! Let me know if you have any other questions.