Consider aqueous solutions of three bases: B1, B2 and B3. Each base has the solution concentration 0.80 M. These solutions have the following pH values. 0.80 M B1 solution 0.80 M B2 solution 0.80 M B3 solution pH 10.21 9.32 12.18 Based on the above information, which of the following is correct? O The solution containing B2 has the highest OH" concentration among the 3 solutions. B1 has the lowest pKb among the 3 bases. B3 has the lowest pKp among the 3 bases. O The solution containing B3 has the lowest OH" concentration among the 3 solutions. B2 has the lowest pkp among the 3 bases.
Consider aqueous solutions of three bases: B1, B2 and B3. Each base has the solution concentration 0.80 M. These solutions have the following pH values. 0.80 M B1 solution 0.80 M B2 solution 0.80 M B3 solution pH 10.21 9.32 12.18 Based on the above information, which of the following is correct? O The solution containing B2 has the highest OH" concentration among the 3 solutions. B1 has the lowest pKb among the 3 bases. B3 has the lowest pKp among the 3 bases. O The solution containing B3 has the lowest OH" concentration among the 3 solutions. B2 has the lowest pkp among the 3 bases.
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Chapter1: Chemical Foundations
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Transcribed Image Text:**Title: Analyzing pH and pKₐ of Aqueous Base Solutions**
**Content:**
Consider aqueous solutions of three bases: B1, B2, and B3. Each base solution has a concentration of 0.80 M. The solutions exhibit the following pH values:
- 0.80 M B1 solution: pH 10.21
- 0.80 M B2 solution: pH 9.32
- 0.80 M B3 solution: pH 12.18
**Question:**
Based on the above information, which of the following is correct?
- The solution containing B2 has the highest OH⁻ concentration among the 3 solutions.
- B1 has the lowest pKₐ among the 3 bases.
- B3 has the lowest pKₐ among the 3 bases.
- The solution containing B3 has the lowest OH⁻ concentration among the 3 solutions.
- B2 has the lowest pKₐ among the 3 bases.
**Analysis:**
Understanding the relationship between pH, pKₐ, and OH⁻ concentration is essential for determining the correct statements:
1. **pH and OH⁻ Concentration:**
- Higher pH indicates a higher concentration of OH⁻ ions (basic solution).
- B3, with a pH of 12.18, has the highest OH⁻ concentration.
- B2, with a pH of 9.32, has the lowest OH⁻ concentration.
2. **pKₐ Values:**
- Lower pKₐ indicates a stronger base (more tendency to donate OH⁻).
- B3, with the highest pH, is likely to have the lowest pKₐ, indicating the strongest base among the three.
**Conclusion:**
The most correct option based on the data is:
- B3 has the lowest pKₐ among the 3 bases.
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