An acid solution of 0.005 M has a pH of 5. The degree of ionization of acid is

1. 0.1×10-2

2. 0.2×10-2

3. 0.5×10-4

4. 0.6×10-6

Subtopic:  Salt Hydrolysis & Titration |
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pKa value of four acids are given below. The strongest acid is

(I) 4.0

(II) 3.5

(III) 2.5

(IV) 2

1. I

2. II

3. III

4. IV

Subtopic:  pH calculation |
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A solution has hydrogen ion concentration 0.0005 M, its pOH is

1. 8.2798

2. 10.6990

3. 12.7854

4. 13.3344

 

Subtopic:  pH calculation |
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At 25°C, the pH of a solution containing 0.10 M sodium acetate and 0.03 M acetic acid will be:

[pKa value of CH3COOH=4.57]-

1. 3.24

2. 4.59

3. 5.09

4. 6.67

Subtopic:  Buffer |
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Ionization constant of acetic acid is 1.8×10-5. The concentration of H+ ions in 0.1 M solution is

1. 1.8×10-3 M

2. 2.8×10-3 M

3. 1.3×10-3 M

4. 1.34×10-4 M

Subtopic:  Ionisation Constant of Acid, Base & Salt |
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The dissociation constant of a weak acid is 4.9×10-8, its percentage ionization at 0.1 M is

1. 0.07%

2. 0.007%

3. 0.7%

4. 0.0007%

Subtopic:  Ionisation Constant of Acid, Base & Salt |
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The pH of a 0.1 M aqueous solution of a weak acid (HA) is 3. What is its degree of dissociation?

1. 1%

2. 10%

3. 50%

4. 25%

Subtopic:  Ionisation Constant of Acid, Base & Salt |
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75 ml of 0.2 M HCl is mixed with 25 ml of 1M HCl. To this solution, 300 ml of distilled water is added. What is the pH of the resultant solution?

1. 1

2. 2

3. 4

4. 0.2

Subtopic:  pH calculation |
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The dissociation constant of two acids HA1 and HA2 are 3.0×10-4 and 1.8×10-5 respectively. The relative strengths of the acids is

1. 1:16

2. 1:4

3. 4:1

4. 16:1

Subtopic:  Ionisation Constant of Acid, Base & Salt |
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0.005 M acid solution has 5 pH. The percentage ionization of acid is

1. 0.8%

2. 0.6%

3. 0.4%

4. 0.2%

Subtopic:  Ionisation Constant of Acid, Base & Salt |
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