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A solution contains equimolar concentrat...

A solution contains equimolar concentration of a weak acid HA and its conjugate base `A^(-) , p K_(b)` of `A^(-)` is 9 . The pH of the solution is

A

methyl orange (3 to 4)

B

methyl red ( 5 to 6)

C

bromothymol blue ( 6 to 7.5 )

D

phenolphthalein (8 to 9.)

Text Solution

Verified by Experts

The correct Answer is:
D
pH range of end point of titration between W.A and `S . B gt 7`
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Knowledge Check

  • A basic buffer contains equal concentration of base and its salt . The dissociation of base is 10^(-6) . Then the pH of the buffer solution is

    A
    6
    B
    8
    C
    5
    D
    9

  • An acidic buffer contains equal concentration of acid and salt . The dissociation constant of acid is 10^(5) The P^(H) of the buffer solution is

    A
    5
    B
    9
    C
    `4.49`
    D
    `5.5`

  • A buffer solution consists of 1 mole each of HA and its conjugate base A^(-) , Addition of which of the following decreases the pH of buffer ?

    A
    0.1 mole of HA
    B
    0.1 mole of `A^(-)`
    C
    0.1 mole of `NaOH`
    D
    Water

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