The concentration of hydrogen ions in a sample of soft drink is 3.8 × 10–3M. The pH of soft drink is:
(Given: log 3.8 = 0.58)

 1 1.45 2 2.42 3 3.76 4 2.79
Subtopic:  pH calculation |
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The ionization constant of HF is 3.2 × 10–4 and its solution concentration is 0.02 M. The  pH of the solution is:

1. 3.45
2. 2.62
3. 4.21
4. 1.89

Subtopic:  pH calculation |
62%
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The pH of 0.004M hydrazine solution is 9.7, its ionization constant Kb and pKb are respectively:

1.  Kb = 8.96 × 10–7; pKb = 6.04
2.
Kb = 7.26 × 10–7 ; pKb = 6.04
3.
Kb = 8.96 × 10–7 ; pKb = 7.02
4.
Kb = 7.26 × 10–7 ; pKb = 7.02

Subtopic:  pH calculation |
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The pH of the solution in which 0.2M NH4Cl and 0.1M NH3 are present is:
(pK
b of ammonia solution is 4.75)

 1 12 2 9 3 6 4 11
Subtopic:  pH calculation |
72%
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The ionization constant of ammonia is 1.77 × 10–5. The pH of a 0.05M of ammonia solution is-

1. 12
2. 11
3. 10
4. 6

Subtopic:  pH calculation |
60%
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The pH after 50.0 mL of 0.10 ammonia solution is treated with 25.0 mL of 0.10M HCl solution is-
(
Kb = 1.77 × 10–5 )

1. 5.74
2. 10.12
3. 8.34
4. 9.24

Subtopic:  pH calculation |
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