PK a of weak acid is 3-0- Effective range of a buffer of HA and A -is -A- 3 to 4B- 4 to 6C- 2 to 3D- 2 to 4

Range of Buffer solution is [(pK_a−1),(pK_a+1)]. As pK_a=3 nbsp; So, pK_a 1=3 1=2 and nbsp;pK_a+1=3+1=4 ∴ effective range of a buffer HA and A^ is nbsp;[2 ...

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Standard XII

Chemistry

Buffer Solutions

pK a of weak ...

Question

$p K_{a}$ of weak acid is 3.0 . Effective range of a buffer of $H A$ and $A^{-}$ is :

3 to 4

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4 to 6

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2 to 3

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2 to 4

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Solution

The correct option is D 2 to 4
Range of Buffer solution is $[(p K_{a} - 1), (p K_{a} + 1)]$ .
As $p K_{a} = 3$
So, $p K_{a} - 1 = 3 - 1 = 2$
and $p K_{a} + 1 = 3 + 1 = 4$
$∴$ effective range of a buffer $H A$ and $A^{-}$ is $[2, 4]$ i.e., from 2 to 4.

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Buffer Solutions

Standard XII Chemistry

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pKa of weak acid is 3.0 . Effective range of a buffer of HA and A− is :

The correct option is D 2 to 4Range of Buffer solution is [(pKa−1),(pKa+1)]. As pKa=3 So, pKa−1=3−1=2 and pKa+1=3+1=4 ∴ effective range of a buffer HA and A− is [2,4] i.e., from 2 to 4.

$p K_{a}$ of weak acid is 3.0 . Effective range of a buffer of $H A$ and $A^{-}$ is :

The correct option is D 2 to 4
Range of Buffer solution is $[(p K_{a} - 1), (p K_{a} + 1)]$ .
As $p K_{a} = 3$
So, $p K_{a} - 1 = 3 - 1 = 2$
and $p K_{a} + 1 = 3 + 1 = 4$
$∴$ effective range of a buffer $H A$ and $A^{-}$ is $[2, 4]$ i.e., from 2 to 4.