You visited us 420 times! Enjoying our articles? Unlock Full Access!

Basic Buffer Action

The toxic com...

Question

The toxic compound $2, 4 - dinitrophenol$ has $K_{a} = 10^{- 4} M$ . In an experiment, a buffer solution of $2, 4 - dinitrophenol$ was prepared with the $p H$ adjusted to $5$ . Calculate the ratio of the concentrations of the dissociated ion to the undissociated acid:

0.01

No worries! We‘ve got your back. Try BYJU‘S free classes today!

0.1

No worries! We‘ve got your back. Try BYJU‘S free classes today!

10

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

100

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is C $10$
$p H = p K_{a} + l o g \frac{s a l t}{a c i d}$

$p K_{a} = - l o g (10^{- 4}) = 4$

Substituting,

$l o g \frac{s a l t}{a c i d} = p H - p K_{a} = 5 - 4 = 1$

So, $\frac{S a l t}{a c i d} = 10$

Ratio of the concentrations of the dissociated ion to the undissociated acid $= 10$

Suggest Corrections

Similar questions

K_{a}

2, 4

3, 5

S^{2 -}

(0.1 M)

H_{2} S

2

H C l

K_{a} = 1.1 \times 10^{- 21}

K_{a}

10^{- 5}

K_{a}

C

K_{a}

C

10

Join BYJU'S Learning Program