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Worksheet 07

Worksheet 07 - CH 302 Spring 2007 Worksheet 7 For all of...

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CH 302 Spring 2007 Worksheet 7 For all of the problems on this worksheet, use the following K values: H 3 PO 4 : pKa 1 = 2 pKa 2 = 6 pKa 3 = 10 H 2 CO 3 : pKa 1 = 4 pKa 2 = 10 1. You drop 0.1 mol of HI into 1 L of water. What is the pH of solution? 2. You drop 0.1 mol of HI into a 1 L solution of 1 M H 3 PO 4 and KH 2 PO 4 . What is the pH of the solution? 3. You drop 0.1 mol of NaOH into a 1 L solution of 0.5 M RbHCO 3 and 0.5 M Na 2 CO 3 . What is the pH of the solution? 4. You drop 0.5 mol of NaOH into a 1 L solution of 0.5 M RbHCO 3 and 0.5 M Na 2 CO 3 . What is the pH of the solution? 5. You drop 1.0 mol of NaOH into a 1 L solution of 0.5 M RbHCO 3 and 0.5 M Na 2 CO 3 . What is the pH of the solution? For questions 6-13, 1.5 L 0.1 M H 3 PO 4 is titrated with 1 M NaOH. Give the pH for the given amount of NaOH solution added to the H 3 PO 4 solution.Ask yourself where you are on the titration curve. It will make the calculation a lot easier. V NaOH pH 6. 0 mL 7. 50 mL 8. 150 mL 9. 250 mL 10. 300 mL 11. 400 mL 12. 450 mL 13. 500 mL

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14. Sketch the titration curve for a
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