Consider the following reaction Fe3 ( a q ) SCN( a q )FeSCN2 ( a q ) ...

Fe3 a q SCN a q FeSCN2 a q Initial1110 ....

Consider the following reaction: Fe3+(aq)+SCNâˆ’(aq)â‡ŒFeSCN2+(aq) A solution is made containing an initial [Fe3+] of 1.1Ã—10âˆ’3 M and an...

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Chemistry

Consider the following reaction:
Fe3+(aq)+SCNâˆ’(aq)â‡ŒFeSCN2+(aq)
A solution is made containing an initial [Fe3+] of1.1Ã—10^âˆ’3 M and an initial [SCNâˆ’] of 8.2Ã—10^âˆ’4M. At equilibrium, [FeSCN2+]= 1.8Ã—10^âˆ’4 M .
Part A
Calculate the value of the equilibrium constant(Kc).
Express your answer using two significant figures.
Kc=

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Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Fe3+(aq)Â Â Â Â Â Â Â Â Â Â Â Â +Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â SCNâˆ’(aq)â‡ŒÂ Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â FeSCN2+(aq)

InitialÂ Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 1.1Ã—10^âˆ’3Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 8.2Ã—10^{âˆ’4Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â} 0

ChangeÂ Â Â Â Â Â Â Â Â Â Â Â -1.8Ã—10^{âˆ’4 Â Â} -1.8Ã—10^{âˆ’4 Â Â} +1.8Ã—10^âˆ’4

At equilibriumÂ Â Â 1.1Ã—10^âˆ’3 - 1.8Ã—10âˆ’4 Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 8.2Ã—10âˆ’4 - 1.8Ã—10âˆ’4 Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 1.8Ã—10^{âˆ’4 Â Â}

Hence Kc = [FeSCN2+] / [Fe3+] [SCNâˆ’].

Â Â Â Â Â Â Â Â Â Â Â Â Â Â =Â Â [1.8Ã—10âˆ’4] / [0.00092] [0.00064]

Â Â Â Â Â Â Â Â Â Â Â Â Â Kc = 305.706

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Consider the following reaction: Fe3+(aq)+SCNâˆ’(aq)â‡ŒFeSCN2+(aq) A solution is made containing an initial [Fe3+] of 1.1Ã—10âˆ’3 M and an...

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Chemistry

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