Answer :
A buffer that is created by mixing 10.0 ml or 0.10 m sodium acetate with 10.0 ml of 0.10 m acetic acid has a pH of 4.94.
How can I determine the pH of the a buffer?
For acidic buffers, the Henderson-Hasselbalch equation must be used to determine the precise pH: "pH ≈ pKa + log10([A-]/[HA])," where Pa is the weak acid's "dissociation constant," [A-] is its conjugate base concentration, and [HA] is its concentration.
How does the pH buffer function?
When an acidic or basic component is added, a buffered solution can withstand the pH change. It can keep the solution's pH level largely constant by neutralizing modest amounts of additional acid or base. For procedures and/or reactions that call for particular and stable pH ranges, this is significant.
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