If to a 100 mL of solution of Q. 100, 0.002mol of HCl is added, its pH changes to

# If to a 100 mL of solution of Q. 100, 0.002$\mathrm{mol}$ of $\mathrm{HCl}$ is added, its pH changes to

1. A

1.5 M

2. B

2.0

3. C

3.0

4. D

4.0

Fill Out the Form for Expert Academic Guidance!l

+91

Live ClassesBooksTest SeriesSelf Learning

Verify OTP Code (required)

### Solution:

In the solution of

$n\left({\mathrm{CH}}_{3}\mathrm{COOH}\right)=n\left({\mathrm{CH}}_{3}\mathrm{COONa}\right)=\left(0.01\mathrm{M}\right)\left(0.1{\mathrm{dm}}^{3}\right)=0.001\mathrm{mol}$

On adding 0.002l, ,the entire CH3COONa is replaced by CH3COOH. Thus, solution contains 0.002 $\mathrm{mol}$ acetic acid and 0.001. The solution concentrations are

The major source of ${\mathrm{H}}^{+}$ in the solution will be $\mathrm{HCl}$.

Hence, $\mathrm{pH}=-\mathrm{log}\left(0.01\right)=2$

## Related content

 Consent Letter – How to Write Consent Letter with Format and Samples Sarvepalli Radhakrishnan Biography Relieving Letter Format, Samples and Templates for Employee How to Write Authorization Letter with Format, Samples and Tips Value of Legal Education in India – All You Need to Know 10 Ways that Education will Improve Your Life! 10 Time Management Tips to Use in Your Exam Preparation Letter to Principal with Format and Samples What is Next Test: National Exit Test – Details, Patterns, Eligibility What is Digital Literacy, Its Importance, and Challenges in Education?

+91

Live ClassesBooksTest SeriesSelf Learning

Verify OTP Code (required)