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pKa of acetic acid is 4.74, which implies that :
- a)pH of 1N acetic acid is 4.74
- b)at pH 4.74, the dissociation of acetic acid is maximum
- c)at pH 4.74 half of acetic acid molecules are dissociated in the solution
- d)at pH 4.74, the dissociation of acetic acid is minimum.
Correct answer is option 'C'. Can you explain this answer?
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pKa of acetic acid is 4.74, which implies that :a)pH of 1N acetic acid...
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pKa of acetic acid is 4.74, which implies that :a)pH of 1N acetic acid...
Yes, because ph value is constant of a solution. When we are not mixing of other ion or different ph solution.
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pKa of acetic acid is 4.74, which implies that :a)pH of 1N acetic acid...
The pKa value of a substance is a measure of its acidity. It is defined as the negative logarithm of the acid dissociation constant (Ka). In the case of acetic acid, the pKa value is 4.74.
Explanation:
1. Definition of pKa:
- pKa is the negative logarithm of the acid dissociation constant (Ka).
- It represents the tendency of an acid to donate a proton (H+) in solution.
- The lower the pKa value, the stronger the acid.
2. Significance of pKa for acetic acid:
- Acetic acid (CH3COOH) is a weak acid.
- Its pKa value of 4.74 indicates that it does not fully dissociate in water.
- At pH values lower than 4.74, acetic acid will be mostly in its undissociated form, CH3COOH.
- At pH values higher than 4.74, acetic acid will start to dissociate and form acetate ions (CH3COO-) and hydrogen ions (H+).
3. Explanation of option C:
- The statement "at pH 4.74, half of the acetic acid molecules are dissociated in the solution" is correct.
- At the pKa value of 4.74, the concentration of acetic acid and its conjugate base (acetate ion) is equal.
- This means that half of the acetic acid molecules have dissociated into acetate ions and hydrogen ions.
- The other half remains undissociated, maintaining the equilibrium between the acid and its conjugate base.
4. Explanation of other options:
- Option A: The pH of a 1N acetic acid solution will depend on the concentration of acetic acid and its dissociation.
- Option B: The dissociation of acetic acid is not necessarily maximum at pH 4.74, as it will depend on the concentration and other factors.
- Option D: The dissociation of acetic acid is not necessarily minimum at pH 4.74, as it will depend on the concentration and other factors.
In conclusion, the correct answer is option C because at pH 4.74, half of the acetic acid molecules are dissociated in the solution due to the equilibrium between the acid and its conjugate base.
Explanation:
1. Definition of pKa:
- pKa is the negative logarithm of the acid dissociation constant (Ka).
- It represents the tendency of an acid to donate a proton (H+) in solution.
- The lower the pKa value, the stronger the acid.
2. Significance of pKa for acetic acid:
- Acetic acid (CH3COOH) is a weak acid.
- Its pKa value of 4.74 indicates that it does not fully dissociate in water.
- At pH values lower than 4.74, acetic acid will be mostly in its undissociated form, CH3COOH.
- At pH values higher than 4.74, acetic acid will start to dissociate and form acetate ions (CH3COO-) and hydrogen ions (H+).
3. Explanation of option C:
- The statement "at pH 4.74, half of the acetic acid molecules are dissociated in the solution" is correct.
- At the pKa value of 4.74, the concentration of acetic acid and its conjugate base (acetate ion) is equal.
- This means that half of the acetic acid molecules have dissociated into acetate ions and hydrogen ions.
- The other half remains undissociated, maintaining the equilibrium between the acid and its conjugate base.
4. Explanation of other options:
- Option A: The pH of a 1N acetic acid solution will depend on the concentration of acetic acid and its dissociation.
- Option B: The dissociation of acetic acid is not necessarily maximum at pH 4.74, as it will depend on the concentration and other factors.
- Option D: The dissociation of acetic acid is not necessarily minimum at pH 4.74, as it will depend on the concentration and other factors.
In conclusion, the correct answer is option C because at pH 4.74, half of the acetic acid molecules are dissociated in the solution due to the equilibrium between the acid and its conjugate base.
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pKa of acetic acid is 4.74, which implies that :a)pH of 1N acetic acid is 4.74b)at pH 4.74, the dissociation of acetic acid is maximumc)at pH 4.74 half of acetic acid molecules are dissociated in the solutiond)at pH 4.74, the dissociation of acetic acid is minimum.Correct answer is option 'C'. Can you explain this answer?
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pKa of acetic acid is 4.74, which implies that :a)pH of 1N acetic acid is 4.74b)at pH 4.74, the dissociation of acetic acid is maximumc)at pH 4.74 half of acetic acid molecules are dissociated in the solutiond)at pH 4.74, the dissociation of acetic acid is minimum.Correct answer is option 'C'. Can you explain this answer? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about pKa of acetic acid is 4.74, which implies that :a)pH of 1N acetic acid is 4.74b)at pH 4.74, the dissociation of acetic acid is maximumc)at pH 4.74 half of acetic acid molecules are dissociated in the solutiond)at pH 4.74, the dissociation of acetic acid is minimum.Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for pKa of acetic acid is 4.74, which implies that :a)pH of 1N acetic acid is 4.74b)at pH 4.74, the dissociation of acetic acid is maximumc)at pH 4.74 half of acetic acid molecules are dissociated in the solutiond)at pH 4.74, the dissociation of acetic acid is minimum.Correct answer is option 'C'. Can you explain this answer?.
pKa of acetic acid is 4.74, which implies that :a)pH of 1N acetic acid is 4.74b)at pH 4.74, the dissociation of acetic acid is maximumc)at pH 4.74 half of acetic acid molecules are dissociated in the solutiond)at pH 4.74, the dissociation of acetic acid is minimum.Correct answer is option 'C'. Can you explain this answer? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about pKa of acetic acid is 4.74, which implies that :a)pH of 1N acetic acid is 4.74b)at pH 4.74, the dissociation of acetic acid is maximumc)at pH 4.74 half of acetic acid molecules are dissociated in the solutiond)at pH 4.74, the dissociation of acetic acid is minimum.Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for pKa of acetic acid is 4.74, which implies that :a)pH of 1N acetic acid is 4.74b)at pH 4.74, the dissociation of acetic acid is maximumc)at pH 4.74 half of acetic acid molecules are dissociated in the solutiond)at pH 4.74, the dissociation of acetic acid is minimum.Correct answer is option 'C'. Can you explain this answer?.
Solutions for pKa of acetic acid is 4.74, which implies that :a)pH of 1N acetic acid is 4.74b)at pH 4.74, the dissociation of acetic acid is maximumc)at pH 4.74 half of acetic acid molecules are dissociated in the solutiond)at pH 4.74, the dissociation of acetic acid is minimum.Correct answer is option 'C'. Can you explain this answer? in English & in Hindi are available as part of our courses for NEET.
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pKa of acetic acid is 4.74, which implies that :a)pH of 1N acetic acid is 4.74b)at pH 4.74, the dissociation of acetic acid is maximumc)at pH 4.74 half of acetic acid molecules are dissociated in the solutiond)at pH 4.74, the dissociation of acetic acid is minimum.Correct answer is option 'C'. Can you explain this answer?, a detailed solution for pKa of acetic acid is 4.74, which implies that :a)pH of 1N acetic acid is 4.74b)at pH 4.74, the dissociation of acetic acid is maximumc)at pH 4.74 half of acetic acid molecules are dissociated in the solutiond)at pH 4.74, the dissociation of acetic acid is minimum.Correct answer is option 'C'. Can you explain this answer? has been provided alongside types of pKa of acetic acid is 4.74, which implies that :a)pH of 1N acetic acid is 4.74b)at pH 4.74, the dissociation of acetic acid is maximumc)at pH 4.74 half of acetic acid molecules are dissociated in the solutiond)at pH 4.74, the dissociation of acetic acid is minimum.Correct answer is option 'C'. Can you explain this answer? theory, EduRev gives you an
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