Question

4. If a solution has to be a buffer, its pH should be
A) As its pKa value B) As its pKa value C)
At 7
D)14​

Answer 1

I think its A) Because a buffer solution don't have a definite solution

Answer 2

The correct option is A.

• A buffer solution is prepared by mixing a weak acid or weak base with its corresponding salts.
• Thus salt is a neutral substance so, can't affect the pH value.
• But the pKa value of weak acid or weak base fall effect on pH value.
• Thus the pH value of a buffer solution is the same as its pKa value.