Ex2_S07_ans

Ex2_S07_ans - Name _A. Key_ Problem Session _All_ Chem 114...

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Name _____A. Key_____________ Problem Session ___All_________ Chem 114 Exam 2 Dr. A. H. Martin Total Points = 100 February 23, 2007 Note: All calculations must be shown and all dependent variables (x's) must be defined for full credit. (6) 1. Write the expressions for the following equilibria. a) The K c for 2 Na 2 CO 3 (s) + 2 SO 2 (g) + O 2 (g) 2 Na 2 SO 4 (s) + CO 2 (g) Κ χ = [ΧΟ 2 ] [SO 2 ] 2 [O 2 ] (solids not included) b) The K p for 4 HCl(g) + O 2 (g) H 2 O(g) + 2Cl 2 (g) Κ π = Π Η 2 O P Cl 2 2 P HCl 4 P O 2 (10) 2. Indicate whether the concentration of NO 2 will increase , decrease , or remain the same , when the following stresses are placed on the equilibrium below for which ∆H rxn for the forward reaction is +35 kJ. 7H 2 (g) + 2NO 2 (g) 2NH 3 (g) + 4H 2 O(g) a) Some H 2 is removed. _Increase___________ b) Some H 2 O is added ____Increase c) The system is heated. ____Decrease_________________ d) A catalyst is added. ____Remain the same________________ e) The pressure on the system is doubled by halving the volume. ____Decrease______ (8) 3. Give the correct chemical formula for the following. a) the conjugate base of HClO 2 __ClO 2 1- __________ b) the conjugate acid of CH 3 NH 2 ___CH 3 NH 3 1+ ___________ c) the conjugate acid of H 2 AsO 3 1- __H 3 AsO 3 _____________ d) the conjugate base of HSeO 4 1- __SeO 4 2- _______________ (9) 4. Write the appropriate ionization equilibria and the ionization constant expression for the following equilibria. a) the K
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Ex2_S07_ans - Name _A. Key_ Problem Session _All_ Chem 114...

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