Chapter 16 Lecture Problems
Strong Acid-Strong Base Titration
- Start with 50.0 mL of 0.100 M HCl, Calculate pH
- Add 1 mL 0.200 M NaOH, Calculate pH
- Add 5 mL 0.200 M NaOH, Calculate pH
- Add 10 mL 0.200 M NaOH, Calculate pH
- Add 15 mL 0.200 M NaOH, Calculate pH
- Add 20 mL 0.200 M NaOH, Calculate pH
- Add 25 mL 0.200 M NaOH, Calculate pH
- Add 26 mL 0.200 M NaOH, Calculate pH
- Add 30 mL 0.200 M NaOH, Calculate pH
- Add 50 mL 0.200 M NaOH, Calculate pH
- Summerize results
mL 0.100 M HCl |
mL 0.200 M NaOH |
pH |
50 |
0 |
1.00 |
50 |
1 |
1.03 |
50 |
5 |
1.14 |
50 |
10 |
1.30 |
50 |
15 |
1.51 |
50 |
20 |
1.84 |
50 |
25 |
7.00 |
50 |
26 |
11.42 |
50 |
30 |
12.10 |
50 |
50 |
12.70 |
- Show graph in spreadsheet.
- Solutions
Buffer Calculations
- Calculate for a 0.1 M acetic acid/0.1 M sodium acetate buffer. Solution
- Effect of adding a base to a generic weak acid. (mathcad)
- Add 0.05 moles of sodium hydroxide to 1 liter of acetic acid buffer. (Solution)
- Add 0.05 moles of sodium hydroxide to 1 liter of water.
- Formic acid buffer
- 10.0 mL of 1.0 M formic acid is mixed with 1.00 g of sodium formate and diluted to 250.0 mL.
- Add 5.0 mL of 1.0 M sodium hydroxide to the formic acid/sodium formate solution.
- Add 5.0 mL of 2.0 M hydrochloric acid to the formic acid/sodium formate solution.
- Solutions
- Graph results of adding acid or base to a buffer with spreadsheet
Titration of a weak acid
- Calculate for 100.0 mL of 0.1 M acetic acid solution.
- Add 1 mL of 0.1 M sodium hydroxide.
- Add 10 mL of 0.1 M sodium hydroxide.
- Add 50 mL of 0.1 M sodium hydroxide.
- Add 75 mL of 0.1 M sodium hydroxide.
- Add 100 mL of 0.1 M sodium hydroxide.
- Add 110 mL of 0.1 M sodium hydroxide.
- Graph results with Spreadsheet
- Solutions
Solubility Equlibrium Problems
- Molar Solubility. 9.3x10-3 g of CaCO3 dissolves in 1 L of water. What is the "molar solubility" Solutions
- What is Ksp for CaCO3? Solutions
- How much AgCl will dissolve in 500 mL of water? Ksp = 1.56 x 10-10 Solutions
- How much PbCl2 will dissolve in 500 mL of water? Ksp = 1.6 x 10-5. Solutions
- Given Ksp = 1.5 x 10-11 for Mg(OH)2
- Calculate the mass of Mg(OH)2 that will dissolve in 250 mL of water.
- Calculate the mass of Mg(OH)2 that will dissolve in 250 mL of water with the pH buffered to 13.
- Calculate the mass of Mg(OH)2 that will dissolve in 250 mL of water with the pH buffered to 4.
- Solutions
- For AgCl, Ksp = 1.56 x 10-10
- What is the solubility in water
- What is the solubility in 0.10 M NaCl
- What is the solubility in 1.0 M NaCl
- What happens when 50 mL of 1.0 x10-4 M NaCl is added to 50 mL of 1.0x10-6 M AgNO3.
- Increase the concentration of NaCl to 0.50 M and repeat.
- Solutions
- For PbCl2, Ksp = 1.6 x 10-5
- What is the solubility in water
- What is the solubility in 0.10 M NaCl
- What is the solubility in 1.0 M NaCl
- What happens when 50 mL of 0.20M NaCl is added to 50 mL of 1.0x10-4 M Pb(NO3)2.
- Increase the concentration of NaCl to 2.0 M and repeat.
- Solutions
- Given a solution containing Ba2+ and Fe2+, Start at pH 1 and adjust the pH so that:
- The first ion begins to precipitate
- The second ion begins to precipitate
- How much of the first has precipitated at this point?
- How much of the second ion has precipitated at pH 14?
- Solutions
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Widener University
Chester, PA 19013
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times since 5/30/97.
Last Updated Friday, May 25, 2001 2:10:36 PM