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Higher the amount of acid or base used t...

Higher the amount of acid or base used to produce a definite change of pH in a buffer solution,higher will be its buffer capacity. Buffer capacity of solution is maximum under the following conditions:
[Salt= [Acid] (in acid buffer), [Salt] = [Base] (in base buffer) pH of a buffer solution lies in the range given below: pH = `pk_(a)pm1`,
In other words, any buffer solution can be used as buffer up to two pH units only, depending upon the value of `pK_(a)`, or `pK_(b)`,. A buffer is said to be efficient when `pH_(a) =pK_(a)`, or pOH= `pk_(b)`
Which among the following solution will be the most efficient buffer?

A

`0.1 M CH_3 COONa +0.01 M CH_3 COOH`

B

` 0.1 M NH_4 Cl + 0.1 M NH_4 OH`

C

` 0.0001 M H COOH +0.002 M HCOONa`

D

All of the above

Text Solution

Verified by Experts

The correct Answer is:
B
`[ B ] =[S] therefore ` most efficient
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Knowledge Check

  • Higher the amount of acid or base used to produce a definite change of pH in a buffer solution,higher will be its buffer capacity. Buffer capacity of solution is maximum under the following conditions: [Salt= [Acid] (in acid buffer), [Salt] = [Base] (in base buffer) pH of a buffer solution lies in the range given below: pH = pk_(a)pm1 , In other words, any buffer solution can be used as buffer up to two pH units only, depending upon the value of pK_(a) , or pK_(b), . A buffer is said to be efficient when pH_(a) =pK_(a) , or pOH= pk_(b) The bulfer capacity is equal to :

    A
    `(Deltan)/(DeltapH)`
    B
    `(pH)/(Deltan)`
    C
    `pK_(a)=pm1`
    D
    none of these

  • Higher the amount of acid or base used to produce a definite change of pH in a buffer solutions, higher will be its buffer capacity . Buffer capacity of solution is maximum under the following conditions: [Salt ]= [Acid ](in acid buffer ) ,[Salt ] =[Base] (in base buffer) pH of a buffer solution lies in the range given below : pH= pK_a +1 In other words any buffer solutions can be used as buffer up two pH units only. depending upon the value of pK_a or pK_b . A buffer is said to be efficient when pH = pK_a or pOH =pK_b , Buffer capacity is maximum when:

    A
    one mole of `NH_4 Cl` is added to one mole of `NH_4 OH`
    B
    one mole of `NH_4 OH ` is added to one mole of HCl
    C
    one mole of `NH_4 Cl ` is added to one mole of NaOH
    D
    one mole of `NaCl ` is added to one mole of NaOH

  • Higher the amount of acid or base used to produce a definite change of pH in a buffer solutions, higher will be its buffer capacity . Buffer capacity of solution is maximum under the following conditions: [Salt ]= [Acid ](in acid buffer ) ,[Salt ] =[Base] (in base buffer) pH of a buffer solution lies in the range given below : pH= pK_a +1 In other words any buffer solutions can be used as buffer up two pH units only. depending upon the value of pK_a or pK_b . A buffer is said to be efficient when pH = pK_a or pOH =pK_b , The buffer capacity is equal to :

    A
    `(Delta n)/( Delta pH)`
    B
    ` (pH)/(Delta n) `
    C
    `pK_a =+- 1`
    D
    none of these

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