[J] for solute in a dilute solution

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Yinhan_Liu_1D
Posts: 51
Joined: Sat Sep 24, 2016 3:00 am

[J] for solute in a dilute solution

Postby Yinhan_Liu_1D » Tue Nov 08, 2016 9:25 pm

I am wondering, for example, if the solute is ZnCl2, and in the chemical reaction, its phase is (aq), when we plug in the activity of this part, should we plug in [ZnCl2]^n or [Zn]^n [Cl]^2n?

In the solution, ZnCl2 appears as ions, right?

I would really appreciate your help!

edward_qiao_3I
Posts: 27
Joined: Tue Oct 04, 2016 3:02 am
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Re: [J] for solute in a dilute solution

Postby edward_qiao_3I » Wed Nov 09, 2016 1:24 pm

the concentration of Zinc Chloride would go in the denominator, while the concentration of Zinc ion and Chloride ion would go in the numerator.

EDIT: sorry, since Zinc Chloride actually appears as a solid, it is not included in the calculation of the equilibrium constant. Your end equation for chemical equilibrium constant K is K=[Zn][Cl]^2


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