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Q.

The ratio of dissociation constant of two weak acid HA and HB is 4 . At what molar concentration ratio the two acids will have same pH in separat solutions?

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a

2

b

0.25

c

0.5

d

4

answer is D.

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Detailed Solution

Given that, the ratio of dissociation constant of two weak acid HA and HB is 4 . So,

H+1H+2=k1c1k2c2  ⇒k1k2=c2c1;c1c2=0.25

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