Question 8.E.H: Which of the following bases would be most suitable for prep...
Which of the following bases would be most suitable for preparing a buffer of pH 9.00? (i) NH_{3} (ammonia, K_{b} = 1.76 × 10^{−5}); (ii) C_{6}H_{5}NH_{2} (aniline, K_{b} = 3.99 × 10^{−10}); (iii) H_{2}NNH_{2} (hydrazine, K_{b} = 1.05 × 10^{−6}); (iv) C_{5}H_{5}N (pyridine, K_{b} = 1.58 × 10^{−9})
| Compound | pK_{a} (for conjugate acid) |
| Ammonia | 9.24 ← Most suitable, because pK_{a}
is closest to pH 9.00 |
| Aniline | 4.60 |
| Hydrazine | 8.02 |
| Pyridine | 5.20 |
Related Answered Questions
Question: 8.4
Verified Answer:
In Appendix G, we find that pK_{a} ...
Question: 8.3
Verified Answer:
When ammonia is dissolved in water, its reaction i...
Question: 8.2
Verified Answer:
We assume that ammonium halide salts are completel...
Question: 8.E.J
Verified Answer:
(a) pH = pK_{a} + \log \frac{[B]}{[BH^{+}]...
Question: 8.E.A
Verified Answer:
pH = −\log \mathcal{A}_{H^{+}} . Bu...
Question: 8.E.B
Verified Answer:
(a) Charge balance: [H^{+}] = [OH^{−}] + [B...
Question: 8.E.K
Verified Answer:
The reaction of phenylhydrazine with water is
[lat...
Question: 8.E.L
Verified Answer:
We use Goal Seek to vary cell B5 until cell D4 is ...
Question: 8.E.I
Verified Answer:
pH = 4.25 + log 0.75 = 4.13
Question: 8.E.G
Verified Answer:
(a) \underset{F - x}{CH_{3}CH_{2}NH_{2}}...