how does the ph difference between the acetate buffer and the water differ when
ID: 1006715 • Letter: H
Question
how does the ph difference between the acetate buffer and the water differ when NaOH or HCL is added to each other ? Data Analysis: Part 1: Qualitative Assessment of Acetate Buffer How does the pH difference between the acetate buffer and the water differ when NaOH or HCI is added to each? Based on this information, which of the two would be considered a better solution for pH control? How do you hypothesize that these results would differ if a basic buffer was used (vs. an acidic buffer like acetate)? 1. 2. 3.Explanation / Answer
1.
A buffer solution can resist pH change upon the addition of an acid (HCl) or base (NaOH). It is able to neutralize small amounts of added acid or base, thus maintaining the pH of the solution relatively stable. Buffer solutions have a working pH range and capacity which dictate how much acid/base can be neutralized before pH changes, and the amount by which it will change.
Where as if an acid (HCl) or base (NaOH) is added to water, the pH will change abruptly.
2.
Buffer solution will be better solution for pH control.
3.
For acidic buffer:
Henderson-Hasselbalach equation will be represented as
pH = pKa + log ( [salt] / [acid] )
where as for basic buffer
pOH = pKb + log ( [salt] / [base] )
To calculate pH, we need
pH = 14 - pOH equation.
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