Final_F2004 - Final Exam Chemistry 112 Name: F04 _ Social...

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1 Final Exam Chemistry 112 F04 Name: _______________________________ Social Security Number: __________________ Each problem is worth 10 points. Show all your work ! Circle the final answer! Remember units and significant figures!!
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2 1. Compute a boiling point of solution made by dissolving of 39 grams of CaF 2 in 500 g of water. K b of water is 0.51 ºC kg/mol, MW of CaF 2 = 78.0 g/mol. Pure water boils at 100 ºC.
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3 2. For reaction N 2 (g) + 3H 2 (g) 2NH 3 (g) K c = 9.4 M -2 at 300 K. Compute K p for this reaction. Also, compute K p for the reaction 4NH 3 (g) 2N 2 (g) + 6H 2 (g).
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4 3. For reaction N 2 (g) + 3H 2 (g) 2NH 3 (g) K c = 9.4 M -2 at 300 K. Which way will this reaction proceed if [N 2 ] = 0.3 M, [H 2 ] = 0.4 M, [NH 3 ] = 0.5 M?
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5 4. Calculate the solubility of copper iodate Cu(IO 3 ) 2 , K sp = 7.4×10 -8 M 3 , in 0.1 M copper nitrate Cu(NO 3 ) 2 solution.
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6 5. Will the precipitate form if 100 mL of 0.01 M solution of La(NO 3 ) 3 is added to 100 mL of 0.04 M solution of NaF? K sp of LaF 3 = 1.5×10 -8 M 4 ?
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6. The reaction N 2 (g) + 3H 2 (g) 2NH 3 (g) is exothermic. In which direction (left L , right R , unchanged U ) will equilibrium shift if a. Additional ammonia is added to the system? b.
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This note was uploaded on 10/03/2011 for the course CHEM 112 taught by Professor Chen during the Spring '09 term at South Carolina.

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Final_F2004 - Final Exam Chemistry 112 Name: F04 _ Social...

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