Editing Problems On Equilibrium
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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. For reaction 2 <nowiki>SO</nowiki><sub>2(g)</sub> + O<sub>2(g)</sub> <--> 2 <nowiki>SO</nowiki><sub>3(g)</sub><br> a 0.25-L container initially has 2.00 moles of <nowiki>SO</nowiki><sub>3</sub>. If 75% of this compound has reacted at equilibrium, what are the equilibrium concentration of all species and then calculated K (equilibrium constant)?<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> has a K= 11.5. A 0.5-L gas vessel has one mole of <nowiki>PCl</nowiki><sub>5</sub>, what is the equilibrium concentration of all species?<b>For 2007-2008, do not do this question, Question 4, only for extra credit. It is an Ice Box Problem.</b><br> <br> <br> <br> <br> <br> <br> <br> <Br> <Br> <br> <br> <Br> <br> <br> <br> <br> <br> <Br> <br> <br> <i>Answer:<br> 1. K = 0.786 , no units<br> 2. <nowiki>[S</nowiki><sub>2</sub>] = 5.18E-2 M<br> 3. <nowiki>[SO</nowiki><sub>2</sub>] = 6.00M, <nowiki>[SO</nowiki><sub>3</sub>] = 2.00M , <nowiki>[O</nowiki><sub>2</sub>] = 3.00M and K = 3.70E-2, units = M<sup>-1</sup><br> 4. <nowiki>[PCl</nowiki><sub>3</sub>] = 1.74M, <nowiki>[PCl</nowiki><sub>5</sub>] = 0.265M , <nowiki>[Cl</nowiki><sub>2</sub>] = 1.74M<br> </i>
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