MyQuestionIcon

1

You visited us 1 times! Enjoying our articles? Unlock Full Access!

pH of a Solution

Calculate the...

Question

Calculate the $p H$ of a $0.10 M$ solution of $N a C N (a q), K_{a}$ for $H C N$ is $4.9 \times 10^{- 10}$ at $25^{o} C$ .

A

11.15

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

B

2.85

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

C

8.75

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

D

7

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

Open in App

Solution

The correct option is A $11.15$
$N a C N$ (salt of $S B 8 W A$ )
$p H = \frac{1}{2} [p k_{w} + p k_{a} + l o g c]$
$= \frac{1}{2} [19 + 10 - l o g 4.9 + l o g 0.1]$
$= 11.15$

Suggest Corrections

thumbs-up

0

Similar questions

Q. Calculate the pH of a

0.10 M

N a C N (a q)

K_{a}

H C N

4. 9 \times 10^{- 10}

25^{o} C

.

K_{a}

H C N

5 \times 10^{- 10}

25^{o} C

. For maintaining a constant

p H

9

, the volume of

5 M

K C N

solution required to be added to

10

2 M

H C N

K_{a}

H C N

5 \times 10^{- 10}

25^{o} C

. For maintaining a constant

p H

of 9, the volume of

5 M K C N

solution required to be added to

10 m L

2 M H C N

K_{a}

H C N

5 \times 10^{- 10}

25^{o} C

. For maintaining a constant

p H = 9

, the volume of

5 M

K C N

solution required to be added to

10 m l

2 M

H C N

solution is:[Given

{log}_{10} 5 = 0.69

(- 0.3010) = 0.5

]

K_{a}

for a monobasic acid whose

0.10 M

p H

4.50

10^{- x}

x

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

pH of a Solution

CHEMISTRY

Watch in App

explore_more_icon

Explore more

pH of a Solution

Standard IX Chemistry

Join BYJU'S Learning Program

CrossIcon