Which of the following substances has the strongest acid, given their pH values:
A (9.5), B (2.5), C (3.5), and D (5.5)?
1. A
2. C
3. D
4. B
A solution has hydrogen ion concentration 0.0005 M, its pOH is:
1. 8.2798
2. 10.6990
3. 12.7854
4. 13.3344

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An aqueous solution has a pH value of 0. What can be inferred about the nature of this solution?
1. Slightly acidic
2. Strongly acidic
3. Neutral
4. Basic
The pH of the solution obtained by mixing 600 mL of 0.04 M HCl and 400 mL of 0.02 M H2SO4 is:
[log 4 = 0.6]
1. 3.4
2. 5.4
3. 1.4
4. 2.4