Editing Problems On Equilibrium-Revised 2009
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<b>Remember: Need to Write Down First Balanced Chemical Reaction and Equilibrium Constant Expression</b><br> <br> 1. At 750degC, the following reaction reaches equilibrium in a 1-L container.<br> <center>1 H<sub>2(g)</sub> + 1 <nowiki>CO</nowiki><sub>2(g)</sub> <--> 1 H<sub>2</sub>O<sub>(g)</sub> + 1 <nowiki>CO</nowiki><sub>(g)</sub></center><br> At equilibrium, the 1-L flask contains 0.053moles hydrogen, 0.053moles carbon dioxide, 0.047moles water, and 0.047moles carbon monoxide. Calculate K<sub>eq</sub> for this reaction.<br> <br> <br> <br> <br> <br> <Br> <Br> <br> <br> <Br> <br> <br> <br> <br> <br> 2.For the reaction , 2 H<sub>2</sub>S<sub>(g)</sub> <--> 2 H<sub>2(g)</sub> + S<sub>2(g)</sub><br> K<sub>eq</sub> = 2.3E-4. If the equilibrium concentration of H<sub>2</sub>S and H<sub>2</sub> are 0.15M and 0.010M, what is the equilibrium concentration of S<sub>2</sub>? <br> <br> <br> <br> <br> <br> <br> <Br> <Br> <br> <br> <br> <br> <Br> <br> <br> <br> <br> 3. The reaction 2 <nowiki>SO</nowiki><sub>2(g)</sub> + O<sub>2(g)</sub> <--> 2 <nowiki>SO</nowiki><sub>3(g)</sub> is performed in a 0.50-L container. At equilibrium, 2.00 moles of <nowiki>SO</nowiki><sub>3</sub>, 1.75moles of O<sub>2</sub> and 3.25moles of <nowiki>SO</nowiki><sub>2</sub> are located in the container . What is the equilibrium constant (K)? (also include the units of K).<br> <br> <br> <br> <Br> <Br> <br> <br> <br> <br> <br> <br> <br> <br> <br> <br> <br> <Br> <br> <br> <br> <br> <br> <Br> 4. The reaction <nowiki>PCl</nowiki><sub>5(g)</sub> <---> <nowiki>PCl</nowiki><sub>3(g)</sub> + Cl<sub>2(g)</sub>. At equilibrium, a 1.0-L gas vessel has 1.25moles of <nowiki>PCl</nowiki><sub>3</sub>, 0.755moles of Cl<sub>2</sub> and 2.45moles of <nowiki>PCl</nowiki><sub>5</sub>. What is the equilibrium constant?<br> <br> <br> <br> <br> <br> <br> <br> <Br> <Br> <br> <br> <br> <br> <br> <br> <br> <br> <Br> <br> <br> <i>Answer:</i><br> 1. K = 0.786 , no units<br> 2. <nowiki>[S</nowiki><sub>2</sub>]<sub>E</sub> = 5.18E-2 M<br> 3. K = 0.108 M<sup>-1</sup><br> 4. K = 0.385 M<br>
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