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In the following question, a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct option out of the choices given below each question.
Assertion (A): An aqueous solution of ammonium acetate can act as a buffer.
Reason (R) : Acetic acid is a weak acid and NH4OH is a weak base.
- a)Both A and R are true and R is correct explanation of A.
- b)Both A and R are true but R is not correct explanation of A.
- c)A is false but R is true.
- d)Both A and R are false.
Correct answer is option 'C'. Can you explain this answer?
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Verified Answer
In the following question, a statement of Assertion (A) followed by a ...
Analyzing the Assertion and Reason:
Assertion : It is true because solution of ammonium acetate is salt solution giving NH+4 and CH3COO− ions which can react with both H+ and OH− from strong acid or base in a small amount to form weak acid or base so will resist the change in pH, so it is a buffer solution.
Assertion : It is true because solution of ammonium acetate is salt solution giving NH+4 and CH3COO− ions which can react with both H+ and OH− from strong acid or base in a small amount to form weak acid or base so will resist the change in pH, so it is a buffer solution.
Reason : It is not because CH3COOH is weak acid and NH4OH is a weak base as explained above.
Hence A is false but R is true.
Hence A is false but R is true.
Most Upvoted Answer
In the following question, a statement of Assertion (A) followed by a ...
Assertion (A): An aqueous solution of ammonium acetate can act as a buffer.
Reason (R): Acetic acid is a weak acid and NH4OH is a weak base.
Explanation:
A buffer solution is a solution that resists changes in pH when small amounts of acid or base are added to it. It consists of a weak acid and its conjugate base, or a weak base and its conjugate acid.
Let's analyze the given assertion and reason:
Assertion (A): An aqueous solution of ammonium acetate can act as a buffer.
This statement is true. Ammonium acetate is the salt of a weak acid (acetic acid) and a weak base (ammonia). When ammonium acetate is dissolved in water, it dissociates into ammonium ions (NH4+) and acetate ions (CH3COO-). The acetic acid and acetate ions form a conjugate acid-base pair. The presence of this pair allows the solution to resist changes in pH, making it a buffer solution.
Reason (R): Acetic acid is a weak acid and NH4OH is a weak base.
This statement is true. Acetic acid (CH3COOH) is a weak acid because it does not dissociate completely in water, releasing only a small fraction of H+ ions. NH4OH (ammonium hydroxide) is a weak base because it does not dissociate completely in water, releasing only a small fraction of OH- ions. Weak acids and weak bases do not fully ionize in water, which is why they can act as buffers.
Conclusion:
Based on the above analysis, both the assertion and reason are true. The reason provides a correct explanation for the assertion. Therefore, the correct option is (a) Both A and R are true and R is the correct explanation of A.
Reason (R): Acetic acid is a weak acid and NH4OH is a weak base.
Explanation:
A buffer solution is a solution that resists changes in pH when small amounts of acid or base are added to it. It consists of a weak acid and its conjugate base, or a weak base and its conjugate acid.
Let's analyze the given assertion and reason:
Assertion (A): An aqueous solution of ammonium acetate can act as a buffer.
This statement is true. Ammonium acetate is the salt of a weak acid (acetic acid) and a weak base (ammonia). When ammonium acetate is dissolved in water, it dissociates into ammonium ions (NH4+) and acetate ions (CH3COO-). The acetic acid and acetate ions form a conjugate acid-base pair. The presence of this pair allows the solution to resist changes in pH, making it a buffer solution.
Reason (R): Acetic acid is a weak acid and NH4OH is a weak base.
This statement is true. Acetic acid (CH3COOH) is a weak acid because it does not dissociate completely in water, releasing only a small fraction of H+ ions. NH4OH (ammonium hydroxide) is a weak base because it does not dissociate completely in water, releasing only a small fraction of OH- ions. Weak acids and weak bases do not fully ionize in water, which is why they can act as buffers.
Conclusion:
Based on the above analysis, both the assertion and reason are true. The reason provides a correct explanation for the assertion. Therefore, the correct option is (a) Both A and R are true and R is the correct explanation of A.
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In the following question, a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct option out of the choices given below each question.Assertion (A): An aqueous solution of ammonium acetate can act as a buffer.Reason (R) : Acetic acid is a weak acid and NH4OH is a weak base.a)Both A and R are true and R is correct explanation of A.b)Both A and R are true but R is not correct explanation of A.c)A is false but R is true.d)Both A and R are false.Correct answer is option 'C'. Can you explain this answer?
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