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Which is not a buffer solution...

Which is not a buffer solution

A

`NH_(4)Cl + NH_(4)OH`

B

`CH_(3)COOH + CH_(3)COONa`

C

`CH_(3)COONa`

D

Borax + Boric acid

Text Solution

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The correct Answer is:
To determine which solution is not a buffer solution, we need to understand the characteristics of buffer solutions and analyze the given options. ### Step-by-Step Solution: 1. **Definition of Buffer Solutions**: A buffer solution is one that resists changes in pH when small amounts of acid or base are added. It typically consists of a weak acid and its conjugate base, or a weak base and its conjugate acid. 2. **Types of Buffer Solutions**: - **Acidic Buffer**: Contains a weak acid and its conjugate base (e.g., acetic acid and sodium acetate). - **Basic Buffer**: Contains a weak base and its conjugate acid (e.g., ammonia and ammonium chloride). 3. **Analyzing the Options**: - **Option 1: NH4OH (Ammonium Hydroxide)**: This is a weak base. If paired with its conjugate acid (NH4+), it can form a buffer solution. - **Option 2: Acetic Acid (CH3COOH)**: This is a weak acid. If paired with its salt (like sodium acetate), it forms an acidic buffer. - **Option 3: Sodium Acetate (CH3COONa)**: This is a salt of a weak acid (acetic acid) and does not contain a weak acid itself. Therefore, it cannot act as a buffer by itself. - **Option 4: Boric Acid (H3BO3)**: This weak acid can form a buffer solution when combined with its conjugate base. 4. **Conclusion**: Based on the analysis, **Sodium Acetate (Option 3)** is not a buffer solution on its own because it lacks a weak acid to pair with. ### Final Answer: **Sodium Acetate is not a buffer solution.** ---
To determine which solution is not a buffer solution, we need to understand the characteristics of buffer solutions and analyze the given options. ### Step-by-Step Solution: 1. **Definition of Buffer Solutions**: A buffer solution is one that resists changes in pH when small amounts of acid or base are added. It typically consists of a weak acid and its conjugate base, or a weak base and its conjugate acid. 2. **Types of Buffer Solutions**: ...
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A solution capable of maintaining its pH relatively constatn, when either excess acid or excess base is added, is said to be buffered While it is not usually considered a buffered solution, a concentrated solution (10^(-2) M and higher) of a strong acid or stong base is buffered against large changes in pH when acids or bases are added. Buffered solutions are usually those containing a wealk acid and a salt of that weak acid or a weak base and the salt of that weak base. For example a solution containing HAc and NaAC resists large change in pH when acid or alkali is added. For a buffer solution Buiffer capacity is defined as the number of moles of a strong acid or a strong base that causes 1 of the buffer to undergo a 1 unit change in pH. Buffer capacity is maximum when the molar ratio of the two components is unity and the buffer solution is considerred good. Which solution is not a buffer solution ?

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