(B) Given: $pH = 8.6$. $pOH = 14 - pH = 14 - 8.6 = 5.4$. For a basic buffer: $pOH = pK_b + \log\frac{[\text{Salt}]}{[\text{Base}]}$. $[\text{Salt}] =

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

(B) Given: $pH = 8.6$. $pOH = 14 - pH = 14 - 8.6 = 5.4$. For a basic buffer: $pOH = pK_b + \log\frac{[\text{Salt}]}{[\text{Base}]}$. $[\text{Salt}] = \frac{1 \times 30}{60} = 0.5 \text{ M}$ and $[\text{Base}] = \frac{0.1 \times 30}{60} = 0.05 \text{ M}$. $5.4 = pK_b + \log\frac{0.5}{0.05} = pK_b + \log(10) = pK_b + 1$. $pK_b = 5.4 - 1 = 4.4$.

Class 11 Chemistry 6-2.Equilibrium-II (Ionic Equilibrium)Buffer solution

Medium

The $pH$ of a buffer solution formed by mixing $30 \text{ mL}$ of $0.1 \text{ M } NH_4OH$ and $30 \text{ mL}$ of $1 \text{ M } NH_4Cl$ solutions is $8.6$. The $pK_b$ of $NH_4OH$ is

AP EAMCET 2018 All AP EAMCET

A
$5.4$
B
$4.4$
C
$5.6$
D
$4.2$

Explore More

Browse All

Question Bank

All Subjects

Class 11 Questions

Class 11

Chemistry Questions

Chapter

6-2.Equilibrium-II (Ionic Equilibrium)

Subtopic

Buffer solution

Previous Year

AP EAMCET 2018 Paper All AP EAMCET years →

What is the $pH$ of a buffer solution formed by mixing $0.01 \ M$ acetic acid and $0.05 \ M$ sodium acetate $(pK_a = 4.7447)$?

EasyMHT CET 2025

View Solution

Explain the preparation of an acidic buffer solution with an example.

Difficult

View Solution

For a $10 \, mL$ solution containing $0.1 \, M \, NH_4Cl$ and $0.01 \, M \, NH_4OH$,which of the following additions will not change the $pH$ of the solution?

Medium

View Solution

$2 \ g$ acetic acid and $3 \ g$ sodium acetate are present in $100 \ mL$ aqueous solution. What will be the $pH$ of the solution if the ionisation constant of acetic acid is $1.8 \times 10^{-5}$?

Medium

View Solution

Which of the following acts as a buffer solution?

Easy

View Solution

Vedclass Products

For Students

Vedclass Test Series

Mock tests in real JEE/NEET style with performance analysis. 5-day free trial.

Start Free Trial

For Teachers

Exam Paper Generator

Generate Set A/B/C/D exam papers from 7.5L+ questions in 2 minutes. 3 chapters free.

Try Free

For Institutes

Online Exam Module

Live online exams with unlimited students, 360° analytics & white-label branding.

See Demo

The $pH$ of a buffer solution formed by mixing $30 \text{ mL}$ of $0.1 \text{ M } NH_4OH$ and $30 \text{ mL}$ of $1 \text{ M } NH_4Cl$ solutions is $8.6$. The $pK_b$ of $NH_4OH$ is

Similar Questions

What is the $pH$ of a buffer solution formed by mixing $0.01 \ M$ acetic acid and $0.05 \ M$ sodium acetate $(pK_a = 4.7447)$?

Explain the preparation of an acidic buffer solution with an example.

For a $10 \, mL$ solution containing $0.1 \, M \, NH_4Cl$ and $0.01 \, M \, NH_4OH$,which of the following additions will not change the $pH$ of the solution?

$2 \ g$ acetic acid and $3 \ g$ sodium acetate are present in $100 \ mL$ aqueous solution. What will be the $pH$ of the solution if the ionisation constant of acetic acid is $1.8 \times 10^{-5}$?

Which of the following acts as a buffer solution?

Vedclass Test Series

Exam Paper Generator

Online Exam Module