CameraIcon

SearchIcon

MyQuestionIcon

5

You visited us 5 times! Enjoying our articles? Unlock Full Access!

Basic Buffer Action

One litre of ...

Question

One litre of an aqueous solution contains $0.15$ mole of $C H_{3} C O O H (p K_{a} = 4.8)$ and $0.15$ mole of $C H_{3} C O O N a$ . After the addition of $0.05$ mole of solid $N a O H$ to this solution, the $p H$ will be:

A

4.5

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

B

4.8

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

C

5.1

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

D

5.4

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

Open in App

Solution

The correct option is C $5.1$
$C H_{3} C O O H (p K_{a} = 4.8)$
$p H = p K_{a} + log \frac{[Conjugate Base]}{[A c i d]}$
After adding NaOH, it will react with acid and salt forms so now
$p H = p K_{a} + log \frac{[Conjugate Base]}{[A c i d]} = 4.8 + l o g (0.15 + 0.05) / (0.15 - 0.05) = 4.8 + l o g (0.20 / 0.10) = 5.1$

Suggest Corrections

thumbs-up

0

Similar questions

1

{C H}_{3} C O O H

1

{C H}_{3} C O O N a

are dissolved in water to form

1

litre aqueous solution. The pH of the resulting solution will be:

Q. The ratio of

p H

of a solution containing

1

{C H}_{3} C O O N a + 1

H C l

per litre and of other solution containing

1

{C H}_{3} C O O N a + 1

mole of acetic acid per litre is:

Q. The addition of 0.15 moles of

N a_{2} S O_{4}

to an aqueous solution containing 0.05 moles of

B a C l_{2}

results in the formation of an insoluble white precipitate of

B a S O_{4}

. Find the limiting reagent and the amount of

B a S O_{4}

that gets formed.

0.1 m o l e

C H_{3} C O O H

C H_{3} C O O N a

are dissolved in pure water to prepare

100 m k

of its solution.

p K_{a}

C H_{3} C O O H

4.8

. How many milli moles of

N a O H

to be added to the above solution to make its

p H = 5.1

?

Q. Calculate the ratio of pH of a solution containing

1

{C H}_{3} C O O N a + 1

H C l

per litre and of other solution containing

1

{C H}_{3} C O O N a + 1

mole of acetic acid per litre :

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Buffer Solutions

CHEMISTRY

Watch in App

explore_more_icon

Explore more

Basic Buffer Action

Standard XII Chemistry

Join BYJU'S Learning Program

CrossIcon