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 2 6 3 12 4 15
Subtopic:  pH calculation |
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The concentration of hydrogen ion in a sample of soft drink is $3.8$ $×{10}^{-3}$ $\mathrm{M}$. The  pH of the soft drink will be:

 1 3.14 2 2.42 3 11.58 4 6
Subtopic:  pH calculation |
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The number of ${\mathrm{H}}^{\oplus }$ ions present in 1 ml of a solution whose pH= 4 , is given as:

(${N}_{A}=$ $Avogadro\text{'}s$ $number$)

1. ${10}^{-7}{N}_{A}$

2. ${10}^{-8}{N}_{A}$

3. ${10}^{-16}{N}_{A}$

4. ${10}^{-14}{N}_{A}$

Subtopic:  Acids & Bases - Definitions & Classification | pH calculation |
76%
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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 $1.8×{10}^{-4}$ , 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

Subtopic:  pH calculation |
66%
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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 12.7 2 1.3 3 3.14 4 11.7
Subtopic:  pH calculation |
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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

Subtopic:  Ionisation Constant of Acid, Base & Salt | pH calculation |
71%
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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. $\mathrm{\alpha }$ 0.63 × 102

2. $\mathrm{\alpha }$ 1.63 × 104

3. $\mathrm{\alpha }$ 1.63 × 102

4. $\mathrm{\alpha }$ 0.05 × 102

Subtopic:  Ionisation Constant of Acid, Base & Salt | pH calculation |
68%
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