c 5pts Balanced overall reaction in acid 5H 2 O 5SO 3 2 12H 2IO 3 5SO 4 2 10H I

C 5pts balanced overall reaction in acid 5h 2 o 5so 3

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c) (5pts)Balanced overallreaction in acid : O O d) (9pts)32.5 mL of 0.5M Na2SO3is used to titrate a 100.0mL solution with an unknown concentration of KIO3to the equivalence point. Determine the concentration of the KIO3solution. Δ H o f (kJ/mol) Δ S o m (J/Kmol) Δ G o f (kJ/mol) CH 4(g) -74.81 186.26 -50.72 S 8(s) 0 31.8 0 CS 2(l) 89.7 151.34 65.27 H 2 S (g) -20.63 205.79 -33.56 b) (6pts ) This reaction is spontaneous at: ( circle one): A) All temperatures B) Low temperatures C) High temperatures D) No temperature
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CHEM 230 2010-2011 Final Exam Problem Bank Key p14 31) When (NH4)2[MoCl5(H2O)] and KNCO are mixed in pyridine, the neutral mer[Mo(NCO)3py3] and anionic trans-[Mo(NCO)4py2]-are formed.a) (5pts)Chloride and water are both weak-field ligands. Fill in the energy level diagram with the d electrons of the reactant (NH4)2[MoCl5(H2O)]: - b) (5pts)The products contain strong-field ligands. Which has the larger the Δo? (Circle one.) c) (3pts)py is a neutral monodentate ligand. What is the charge of the NCO ligand? -1 d) ( 4pts) Circle ALL of the complexes that are paramagnetic: None (NH 4 ) 2 [MoCl 5 (H 2 O)] mer -[Mo(NCO) 3 py 3 ] trans -[Mo(NCO) 4 py 2 ] -
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CHEM 230 2010-2011 Final Exam Problem Bank Key p15
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CHEM 230 2010-2011 Final Exam Problem Bank Key p16
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CHEM 230 2010-2011 Final Exam Problem Bank Key p17
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CHEM 230 2010-2011 Final Exam Problem Bank Key p18
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CHEM 230 2010-2011 Final Exam Problem Bank Key p19 40) (20 pts)When iron(II) nitrate dissolves in water it forms a coordination complex. This complex acts as a Bronsted acid as follows: [Fe(H2O)6]2+(aq)+ H2O(l)[Fe(OH)(H2O)5]+(aq)+ H3O+(aq)d) The Kaof iron(II) is 8x10-11. What is the pH of a 0.3M solution of Fe(NO3)2a) Name the coordination complex that is the product. ? b) Fill in the energy level diagram for the valence electrons of [Fe(OH)(H2O) c) Water is a stronger field ligand than hydroxide. (Fill in the blank with < , = , >).4 0 +x x 6
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CHEM 230 2010-2011 Final Exam Problem Bank Key p20
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