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Calculate the pH of a solution that is 0.20 M in NaCH3COO and 0.10 M in CH3COOH.
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1. 4.63
2. 4.74
3. 4.95
4. 5.05
5. 5.22
Calculate the pH of a solution that is 0.12 M in HOCl and 0.20 M in NaOCl.
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1. 6.76
2. 6.32
3. 7.24
4. 7.68
5. 7.76
Calculate the pH of 100. mL of 0.100 M acetic acid, CH3COOH, to which 0.040 mol of sodium acetate, NaCH3COO, has been added.
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1. 5.87
2. 5.35
3. 4.62
4. 4.99
5. 6.26
Which of the following combinations is not buffer solution? All components are present in 0.10 M concentrations.
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1. HCN and NaCN
2. NH3and NH4Cl
3. HCl and NH4Cl
4. CH3COOH and NH4CH3COO
5. NH3and NH4CH3COO
What is the pH of a solution that is 0.20 M in HOCl and 0.15 M NaOCl after 0.050 mol HCl/L has been bubbled into the solution?
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1. 7.85
2. 6.15
3. 6.95
4. 7.06
5. 7.45
The nonionized form of an acid indicator is yellow, and its anion is blue. The Ka of this indicator is 10-5. What will be the approximate pH range over which this indicator changes color?
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1. 3-5
2. 4-6
3. 5-7
4. 8-10
5. 9-11
Calculate the pH of the solution resulting from the addition of 40.0 mL of 0.200 M HClO4 to 60.0 mL of 0.150 M NaOH.
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1. 1.47
2. 2.00
3. 11.88
4. 12.00
5. 13.06
Which titration curve could describe the titration of a solution of HCl by addition of a solution of KOH?
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1. 2.
3.
4. 5.
Consider the titration of a solution of a weak acid by adding a solution of a strong base. Which response includes all the following statements that are true, and no others? I. The end-point cannot be detected using an indicator. II. The pH at the equivalence point is 7.00. III. The solution is buffered before the equivalence point. IV. The solution is buffered both before and after the equivalence point. V. Methyl orange (pH color range 3.1-4.4) would be a better indicator for this titration than would thymol blue (pH range 8.0-9.6).
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1. II and IV
2. III
3. IV and V
4. I and III
5. IV and V
What is the pH of the solution resulting from the addition of 20.0 mL of 0.0100 M NaOH solution to 30.0 mL of 0.0100 M acetic acid, CH3COOH?
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1. 2.
3.
4. 5.
Which titration curve could describe the titration of a solution of NH3 by addition of a solution of HCl?
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1. 2.
3.
4. 5.
