final-2 - Chemistry 2000 Spring 2001 Section B Final...

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Chemistry 2000 Spring 2001 Section B Final Examination Time: 3 hours Aids allowed: Calculator. In particular, periodic tables and other written or printed materials are excluded. Additional data is given at the end of this paper. Write all your answers in the booklets provided. Your answers need not be entered into the booklets in order, provided all answers are labeled clearly with the question number. Answer all questions in section 1. In other sections, you have some choice. Do not answer more than the required number of questions. Extra answers will not be marked. 1 Answer all questions in this section. Total value of questions in this section: 70 marks 1. The following data have been obtained for the reaction 2H 2 g 2NO g 2H 2 O g N 2 g at 700 C: H 2 (mol/L) [NO] (mol/L) rate molL 1 s 1 0 0050 0 025 1 2 10 6 0 010 0 025 2 4 10 6 0 010 0 0125 0 60 10 6 Determine the rate law and rate constant. [7 marks] 2. Calculate the pH of a 6 3 10 4 mol L solution of potassium hydroxide in water at 25 C. [4 marks] 3. Calculate the pH of a 6 3 10 4 mol L aqueous sodium sulfite (Na 2 SO 3 ) solution at 25 C. The K b of the sulfite ion is 1 6 10 7 . [8 marks] 1
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4. Which of the following two compounds C H 3 CH 2 OH C H 3 O CH 3 ethanol dimethyl ether would you expect to have the higher vapor pressure? Explain briefly. [3 marks] 5. Pure solid NH 4 HSe is placed in a 2.0 L container at 24 8 C. The container is evacuated. The pressure then rises due to the reaction NH 4 HSe s NH
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This note was uploaded on 03/03/2012 for the course CHEM 2000 taught by Professor Roussel during the Fall '06 term at Lethbridge College.

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final-2 - Chemistry 2000 Spring 2001 Section B Final...

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