The concentration of CH3COOH that will have the same [H+] as obtained from 10-2 M HCOOH, is-
1. 10 M
2. 5 M
3. 10-1 M
4. 6 M
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The strongest acid among the following compounds is:
1. | HClO3 | 2. | HClO4 |
3. | H2SO3 | 4. | H2SO4 |
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The ionization constant of acetic acid is 1.74 × 10–5. The pH of acetic acid in its 0.05 M solution will be:
1. | 7.81
|
2. | 3.03
|
3. | 8.54
|
4. | 1.45 |
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The ionization constant of propanoic acid is 1.32 × 10–5. The degree of ionization of 0.05M acid solution will be:
1. = 0.63 x 10-2
2. = 1.63 x 10-4
3. = 1.63 x 10-2
4. = 0.05 x 10-2
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The pH of a 0.1 M solution of cyanic acid (HCNO) is 2.34. The ionization constant of the acid will be:
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The ionization constant of phenol is 1.0 × 10–10. The concentration of phenolate ion in 0.05 M solution of phenol will be -
1. 4.2 x 10-4 M
2. 3.6 x 10-5 M
3. 7.8 x 10-6 M
4. 2.2 x 10-6 M
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The ionization constants of HCOOH, and HCN at 298K are 1.8 × 10–4 and 4.8 × 10–9 respectively. The ionization constants of the corresponding conjugate bases of HCOOH and HCN will be:
1. 5.6 x 10-11, 2.08 x 10-6
2. 2.4 x 10-11, 4.2 x 10-6
3. 3.5 x 10-11, 1.7 x 10-6
4. 4.2 x 10-11, 1.2 x 10-6
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The degree of ionization of 0.05 M acetic acid is:
(pKa = 4.74)
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The first ionization constant of H2S is 9.1 × 10–8. The concentration of HS– ion in its 0.1 M solution will be:
1. | 12.3 x 10-7 M | 2. | 11.4 x 10-6 M |
3. | 3.5 x 10-4 M | 4. | 9.54 x 10-5 M |
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The pH value of a 0.01 M solution of an organic acid is 4.15. The pKa of the acid will be:
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