NEET Exam  >  NEET Questions  >  Ka for CH3COOH is 1.8×10^-5. find out the % d... Start Learning for Free
Ka for CH3COOH is 1.8×10^-5. find out the % dissociation of 0.2M CH3COOH in 0.1M HCl solution?
Verified Answer
Ka for CH3COOH is 1.8×10^-5. find out the % dissociation of 0.2M CH3CO...
The dissociation of acetic acid can be represented as:

HCl dissociated completely.
Now, let the concentration of acetate ion be x. Therefore, hydrogen ion contribution from acetic acid = x.
Since HCl dissociates completely, hydrogen ion contribution from HCl =0.1M
Total [H^+] concentration = x + 0.1
Now, Ka for acetic acid = 1.8 x 10^-5
Hence,
This question is part of UPSC exam. View all NEET courses
Most Upvoted Answer
Ka for CH3COOH is 1.8×10^-5. find out the % dissociation of 0.2M CH3CO...
Introduction:
To find the percent dissociation of CH3COOH in an HCl solution, we need to consider the equilibrium reaction between CH3COOH and HCl. The dissociation constant (Ka) of CH3COOH will help us determine the extent of dissociation.

Equilibrium Reaction:
The equilibrium reaction between CH3COOH and HCl can be represented as follows:
CH3COOH + HCl ⇌ CH3COO- + H3O+

Expressing Equilibrium Concentrations:
Let's assume the initial concentration of CH3COOH is 0.2 M. Since HCl is a strong acid and dissociates completely, its concentration is 0.1 M. At equilibrium, let's assume x M of CH3COOH dissociates.

The equilibrium concentrations can be expressed as:
[CH3COOH] = 0.2 - x
[HCl] = 0.1
[CH3COO-] = x
[H3O+] = x

Writing the Expression for Ka:
The expression for Ka is given by:
Ka = ([CH3COO-] * [H3O+]) / [CH3COOH]

Substituting the equilibrium concentrations, the expression becomes:
Ka = (x * x) / (0.2 - x)

Using the Value of Ka:
Given that the Ka for CH3COOH is 1.8x10^-5, we can substitute this value into the equation:
1.8x10^-5 = (x * x) / (0.2 - x)

Solving for x:
Rearranging the equation, we get:
x^2 = 1.8x10^-5 * (0.2 - x)
x^2 = 3.6x10^-6 - 1.8x10^-5x
x^2 + 1.8x10^-5x - 3.6x10^-6 = 0

Solving this quadratic equation, we find that x ≈ 1.8x10^-3 M.

Calculating the Percent Dissociation:
The percent dissociation can be calculated using the formula:
% dissociation = (x / initial concentration) * 100

Substituting the values, we get:
% dissociation = (1.8x10^-3 / 0.2) * 100
% dissociation ≈ 0.9%

Conclusion:
The percent dissociation of 0.2 M CH3COOH in a 0.1 M HCl solution is approximately 0.9%. This means that only a small fraction of CH3COOH molecules dissociate into CH3COO- and H3O+ ions in the presence of HCl.
Community Answer
Ka for CH3COOH is 1.8×10^-5. find out the % dissociation of 0.2M CH3CO...
0.0175
Explore Courses for NEET exam
Ka for CH3COOH is 1.8×10^-5. find out the % dissociation of 0.2M CH3COOH in 0.1M HCl solution?
Question Description
Ka for CH3COOH is 1.8×10^-5. find out the % dissociation of 0.2M CH3COOH in 0.1M HCl solution? for NEET 2025 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about Ka for CH3COOH is 1.8×10^-5. find out the % dissociation of 0.2M CH3COOH in 0.1M HCl solution? covers all topics & solutions for NEET 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Ka for CH3COOH is 1.8×10^-5. find out the % dissociation of 0.2M CH3COOH in 0.1M HCl solution?.
Solutions for Ka for CH3COOH is 1.8×10^-5. find out the % dissociation of 0.2M CH3COOH in 0.1M HCl solution? in English & in Hindi are available as part of our courses for NEET. Download more important topics, notes, lectures and mock test series for NEET Exam by signing up for free.
Here you can find the meaning of Ka for CH3COOH is 1.8×10^-5. find out the % dissociation of 0.2M CH3COOH in 0.1M HCl solution? defined & explained in the simplest way possible. Besides giving the explanation of Ka for CH3COOH is 1.8×10^-5. find out the % dissociation of 0.2M CH3COOH in 0.1M HCl solution?, a detailed solution for Ka for CH3COOH is 1.8×10^-5. find out the % dissociation of 0.2M CH3COOH in 0.1M HCl solution? has been provided alongside types of Ka for CH3COOH is 1.8×10^-5. find out the % dissociation of 0.2M CH3COOH in 0.1M HCl solution? theory, EduRev gives you an ample number of questions to practice Ka for CH3COOH is 1.8×10^-5. find out the % dissociation of 0.2M CH3COOH in 0.1M HCl solution? tests, examples and also practice NEET tests.
Explore Courses for NEET exam
Signup to solve all Doubts
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
10M+ students study on EduRev