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Unformatted text preview: reasoning in a few words. [2 marks each] (a) potassium iodide (b) tartaric acid: C H CH O O OH OH OH O H (c) bromine 4. A 0.0032 mol/L aqueous solution of potassium hydroxide is prepared. What is the pH of this solution at 30 C? [4 marks] 5. Hypochlorous acid (HClO) has a p K a of 7.46 at 25 C. What is the pH of a 0.05 mol/L solution of HClO in water? [10 marks] 6. What is the vapor pressure of a solution made by mixing 50 g of ammonium sulfate into 300 g of water at 40 C? The vapor pressure of pure water at this temperature is 7373 Pa. [10 marks] 7. 2.75 atm of hydrogen gas is mixed with 1.50 atm of iodine vapor at 425 C. The two react, forming HI g . At equilibrium, the partial pressure of HI is 2.79 atm. What is the equilibrium constant for the reaction? [10 marks] Useful data Molar masses of selected elements (g/mol) H 1 0079 O 15 999 S 32 06 N 14 007 At 30 C, K w 1 47 10 14 . Thermodynamic standard states P 1atm c 1mol L 2...
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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.
- Fall '06
- Periodic Table