The pH of a solution made by mixing 50 mL of 0.01 M barium hydroxide solution with 50 mL of H2O is
1. | 3.0 | 2. | 6.0 |
3. | 12.0 | 4. | 15.0 |
The concentration of hydrogen ion in a sample of soft drink is . The pH of the soft drink will be:
1. 3.14
2. 2.42
3. 11.58
4. 6.00
The number of ions present in 1 ml of a solution whose pH= 4 , is given as:
( )
1.
2.
3.
4.
The ionisation constant of an acid, Ka , is the measure of the strength of an acid. The Ka values of acetic acid, hypochlorous acid and formic acid are and , respectively. The correct order of pH value of 0.1 mol dm-3 solutions of these acids is -
1. Acetic acid > hypochlorous acid > formic acid
2. Hypochlorous acid < acetic acid > formic acid
3. Formic acid > hypochlorous acid > acetic acid
4. Formic acid < acetic acid < hypochlorous acid
0.561 g of KOH is dissolved in water to give 200 mL of solution at 298 K. The pH of the solution will be
1. | 12.70 | 2. | 1.30 |
3. | 3.14 | 4. | 11.70 |
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 |
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