The concentration of H+ ion in a solution containing 0.1 M HCN and 0.2 M NaCN will be:

(Ka for HCN = 6.2×10-10)

1. 3.1×1010

2. 6.2×105

3. 6.2×10-10

4. 3.1×10-10

Subtopic:  Buffer |
 67%
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In a buffer solution containing an equal concentration of B- and HB, the Kb for B- is 10-10. pH of the buffer solution is:

1. 10 2. 7
3. 6 4. 4
Subtopic:  Buffer |
 70%
From NCERT
AIPMT - 2010
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Which composition will make the basic buffer?

1. 100 mL of 0.1 M HCl+100 mL of 0.1 M NaOH
2. 50 mL of 0.1 M NaOH+25 mL of 0.1 M CH3COOH
3. 100 mL of 0.1 M CH3COOH+100 mL of 0.1 M NaOH
4. 100 mL of 0.1 M HCl+200 mL of 0.1 M NH4OH
Subtopic:  Buffer |
 62%
From NCERT
NEET - 2019
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