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December 27, 2014

Homework Help: Chemistry

Posted by Sara on Thursday, February 3, 2011 at 5:24pm.

Hi
Please help
Initial [Fe3+] = 0.00050 M
Initial [SCN-] = 0.0010 M
Equilibrium [Fe(SCN)2+] = 5.7 x 10-5

Find [Fe3+]E and [SCN-]E (in mol/L)
Find K.

Balanced equation is:
Fe3+ + SCN- -> Fe(SCN)2+ (reversible)

I know I can get K if I have the equilibrium concentrations, but not sure how to calculate these with so little info.

Thanks.

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