The dissociation consists of acids HA-HB-HC and HD are 2-6- 10 -3 -5-3- 10 -9 -1-1- 10 -2 and 7-5- 10 -5 respectively- The weakest acid amongst these acids is-

The correct option is B HB Dissociation constant for HA acid is #160; 2.6× 10^ 3 Dissociation constant for HB acid is #160; 5.3× ...

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Standard XII

Chemistry

Arrhenius Acid

The dissociat...

Question

The dissociation consists of acids $H A, H B, H C$ and $H D$ are $2.6 \times 10^{- 3}, 5.3 \times 10^{- 9}, 1.1 \times 10^{- 2}$ and $7.5 \times 10^{- 5}$ respectively. The weakest acid amongst these acids is:

H A

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H B

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H C

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H D

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Solution

The correct option is B $H B$
Dissociation constant for $H A$ acid is $2.6 \times 10^{- 3}$
Dissociation constant for $H B$ acid is $5.3 \times 10^{- 9}$
Dissociation constant for $H C$ acid is $1.1 \times 10^{- 2}$
Dissociation constant for $H D$ acid is $7.5 \times 10^{- 5}$

The strength of an acid is directly proportional to square root of dissociation constants of acids.
So lower the dissociation constant, weaker is the acid.
Among these acids, the weakest will be $H B$ as it has the lowest dissociation constant.

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The dissociation consists of acids HA,HB,HC and HD are 2.6×10−3,5.3×10−9,1.1×10−2 and 7.5×10−5 respectively. The weakest acid amongst these acids is:

The dissociation consists of acids $H A, H B, H C$ and $H D$ are $2.6 \times 10^{- 3}, 5.3 \times 10^{- 9}, 1.1 \times 10^{- 2}$ and $7.5 \times 10^{- 5}$ respectively. The weakest acid amongst these acids is: