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An acidic buffer solution can be prepared by mixing the solutions of
- a)ammonium acetate and acetic acid
- b)ammonium chloride and ammonioum hydroxide
- c)sulphuric acid and sodium sulphate
- d)sodium chloride and sodium hydroxide.
Correct answer is option 'A'. Can you explain this answer?
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Verified Answer
An acidic buffer solution can be prepared by mixing the solutions ofa)...
NOTE : Acidic buffer is mixture of weak acid and its salt with common anion.
(a) CH3COOH + CH3COONH4 is acidic buffer.
(b) NH4Cl + NH4OH is basic buffer.
(c) H2SO4 + Na2SO4 is not buffer because both the compounds are strong electrolytes.
(d) NaCl + NaOH is not buffer solution because both compounds are strong electrolytes.
(b) NH4Cl + NH4OH is basic buffer.
(c) H2SO4 + Na2SO4 is not buffer because both the compounds are strong electrolytes.
(d) NaCl + NaOH is not buffer solution because both compounds are strong electrolytes.
Most Upvoted Answer
An acidic buffer solution can be prepared by mixing the solutions ofa)...
Explanation:
An acidic buffer solution is a solution that resists changes in pH when small amounts of acid or base are added to it. It is composed of a weak acid and its conjugate base (or a salt of the weak acid). The weak acid partially dissociates to release H+ ions, which can react with any added base, while the conjugate base can react with any added acid.
Option A: Ammonium acetate and acetic acid
- Ammonium acetate is a salt of a weak acid (acetic acid).
- Acetic acid is a weak acid.
- When ammonium acetate is dissolved in water, it partially dissociates to release ammonium ions (NH4+) and acetate ions (CH3COO-).
- Acetic acid also partially dissociates to release H+ ions and acetate ions.
- The acetate ions from both the salt and the weak acid can react with any added acid, while the ammonium ions can react with any added base.
- This combination of a weak acid and its conjugate base makes the solution resistant to changes in pH.
Option B: Ammonium chloride and ammonium hydroxide
- Ammonium chloride is a salt of a strong acid (hydrochloric acid) and a weak base (ammonia).
- Ammonium hydroxide is a weak base.
- When ammonium chloride is dissolved in water, it completely dissociates into ammonium ions (NH4+) and chloride ions (Cl-).
- Ammonium hydroxide partially dissociates to release hydroxide ions (OH-) and ammonium ions.
- The chloride ions from the salt can react with any added base, but the ammonium ions from the salt and the weak base cannot effectively react with any added acid.
- This combination does not provide an effective buffer system.
Option C: Sulphuric acid and sodium sulphate
- Sulphuric acid is a strong acid.
- Sodium sulphate is a salt of a strong acid (sulphuric acid) and a strong base (sodium hydroxide).
- When sulphuric acid is dissolved in water, it completely dissociates into H+ ions and sulphate ions (SO4^2-).
- Sodium sulphate also completely dissociates into sodium ions (Na+) and sulphate ions.
- This combination does not provide an effective buffer system as there is no weak acid or its conjugate base present.
Option D: Sodium chloride and sodium hydroxide
- Sodium chloride is a salt of a strong acid (hydrochloric acid) and a strong base (sodium hydroxide).
- Sodium hydroxide is a strong base.
- When sodium chloride is dissolved in water, it completely dissociates into sodium ions (Na+) and chloride ions (Cl-).
- Sodium hydroxide also completely dissociates to release hydroxide ions (OH-) and sodium ions.
- This combination does not provide an effective buffer system as there is no weak acid or its conjugate base present.
Therefore, the correct answer is option A, as it provides a combination of a weak acid (acetic acid) and its conjugate base (acetate ions) in the form of ammonium acetate and acetic acid.
An acidic buffer solution is a solution that resists changes in pH when small amounts of acid or base are added to it. It is composed of a weak acid and its conjugate base (or a salt of the weak acid). The weak acid partially dissociates to release H+ ions, which can react with any added base, while the conjugate base can react with any added acid.
Option A: Ammonium acetate and acetic acid
- Ammonium acetate is a salt of a weak acid (acetic acid).
- Acetic acid is a weak acid.
- When ammonium acetate is dissolved in water, it partially dissociates to release ammonium ions (NH4+) and acetate ions (CH3COO-).
- Acetic acid also partially dissociates to release H+ ions and acetate ions.
- The acetate ions from both the salt and the weak acid can react with any added acid, while the ammonium ions can react with any added base.
- This combination of a weak acid and its conjugate base makes the solution resistant to changes in pH.
Option B: Ammonium chloride and ammonium hydroxide
- Ammonium chloride is a salt of a strong acid (hydrochloric acid) and a weak base (ammonia).
- Ammonium hydroxide is a weak base.
- When ammonium chloride is dissolved in water, it completely dissociates into ammonium ions (NH4+) and chloride ions (Cl-).
- Ammonium hydroxide partially dissociates to release hydroxide ions (OH-) and ammonium ions.
- The chloride ions from the salt can react with any added base, but the ammonium ions from the salt and the weak base cannot effectively react with any added acid.
- This combination does not provide an effective buffer system.
Option C: Sulphuric acid and sodium sulphate
- Sulphuric acid is a strong acid.
- Sodium sulphate is a salt of a strong acid (sulphuric acid) and a strong base (sodium hydroxide).
- When sulphuric acid is dissolved in water, it completely dissociates into H+ ions and sulphate ions (SO4^2-).
- Sodium sulphate also completely dissociates into sodium ions (Na+) and sulphate ions.
- This combination does not provide an effective buffer system as there is no weak acid or its conjugate base present.
Option D: Sodium chloride and sodium hydroxide
- Sodium chloride is a salt of a strong acid (hydrochloric acid) and a strong base (sodium hydroxide).
- Sodium hydroxide is a strong base.
- When sodium chloride is dissolved in water, it completely dissociates into sodium ions (Na+) and chloride ions (Cl-).
- Sodium hydroxide also completely dissociates to release hydroxide ions (OH-) and sodium ions.
- This combination does not provide an effective buffer system as there is no weak acid or its conjugate base present.
Therefore, the correct answer is option A, as it provides a combination of a weak acid (acetic acid) and its conjugate base (acetate ions) in the form of ammonium acetate and acetic acid.
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An acidic buffer solution can be prepared by mixing the solutions ofa)ammonium acetate and acetic acidb)ammonium chloride and ammonioum hydroxidec)sulphuric acid and sodium sulphated)sodium chloride and sodium hydroxide.Correct answer is option 'A'. Can you explain this answer?
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