Exam5b-1 - Name: _ 1. A buffer is made by adding some...

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Name: _______________________________________________ 1. A buffer is made by adding some NaH 2 PO 4 to a solution of H 3 PO 4 . a) Write the balanced net ionic equation for this system. b) Identify the weak acid c) Identify the conjugate base of the weak acid. d) What is pK a for this system? 2. A buffer solution is made by adding 8.2 grams of sodium acetate (NaCH 3 CO 2 ) to 1L of a 0.1M acetic acid (CH 3 CO 2 H) solution. What is the pH of the resulting solution?
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3. Make a buffer solution with the following specifications: pH = 5.5, Volume = 2 L, total concentration of major species = 1M. a) Name the components. b) How many grams of each component would you use to make the 2L of solution. 4. What is K SP for PbI 2 if a saturated solution is found to have a concentration of Pb +2 of 1.35 x 10 -3 M?
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5. 100 mL of a 2M HCl solution is titrated with a 2M NaOH solution. a) What is the pH of the HCl solution before any of the NaOH solution is added? b) What volume of the NaOH solution is required to reach the equivalence point
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This note was uploaded on 05/12/2008 for the course CHE 104 taught by Professor Shuman during the Spring '08 term at West Chester.

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Exam5b-1 - Name: _ 1. A buffer is made by adding some...

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