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Chemistry Forums for Students => Undergraduate General Chemistry Forum => Topic started by: IDudeScience on March 28, 2010, 03:52:06 PM

Title: [Fe3+] Equilibrium
Post by: IDudeScience on March 28, 2010, 03:52:06 PM

I am using this formula to find the equilibrium conc of Fe3+

[Fe3+]eq = [Fe3+]Initial - [FeSCN2+]eq

Now my question is, for the initial Fe conc, do I use the concentration that is stated on the bottle? (Bottle that the Fe came from which was 0.150M) Or should I multiply that concentration by the amount used (5ML) and then divide by total volume of solution 25ml (5ml fe, 10ml scn and 10 ml HNO3)

Title: Re: [Fe3+] Equilibrium
Post by: Borek on March 28, 2010, 03:59:27 PM

Second case.

Title: Re: [Fe3+] Equilibrium
Post by: IDudeScience on March 28, 2010, 04:13:52 PM

So even tho HNO3 is added to prevent a precipitate from forming the total still include its?