Equilibrium Constant Question (1 Viewer)

clintmyster

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mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi; mso-fareast-language:EN-US;} .MsoChpDefault {mso-style-type:export-only; mso-default-props:yes; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:Calibri; mso-fareast-theme-font:minor-latin; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi; mso-fareast-language:EN-US;} @page Section1 {size:612.0pt 792.0pt; margin:72.0pt 72.0pt 72.0pt 72.0pt; mso-header-margin:36.0pt; mso-footer-margin:36.0pt; mso-paper-source:0;} div.Section1 {page:Section1;} --> </style><!--[if gte mso 10]> <style> /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin:0cm; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin;} </style> <![endif]-->[FONT=&quot]⇌[/FONT][FONT=&quot] Y, an initial concentration of 1.0 mol/L X is allowed to come to equilibrium. If K = 10, what is the equilibrium concentration of Y?
[/FONT]
 

clintmyster

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uh thanks kaz for helping me out but the answer says 0.91M. Any ideas?
 

jet

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uh thanks kaz for helping me out but the answer says 0.91M. Any ideas?
Well, kaz is assuming that the 1.0 mol/L is the equilibrium concentration, but it isn't.

Assuming the reaction vessel is 1 L, at anytime, there can only be 1.0 mol of reactants,
i.e [x] + [y] = 1.0
x = 1.0 - [y]

At equilibrium, k = 10
therefore 10 = [y]/[x]
[y] = 10(1 - [y])
11[y] = 10
[y] = 0.91 mol/L
 

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