AP Chemistry
8.9 Henderson-Hasselbalch Equation
8.4 Acid-Base Reactions and Buffers
A student prepares a buffer at \(25^\circ\text{C}\) by mixing the solutions shown in the table. The \(pK_a\) of \(\text{HA(aq)}\) is \(5.00\).
The \(\text{OH}^-\text{(aq)}\) reacts completely with \(\text{HA(aq)}\) according to \(\text{HA(aq)}+\text{OH}^-\text{(aq)}\rightarrow\text{A}^-\text{(aq)}+\text{H}_2\text{O(l)}\). Which of the following correctly predicts the pH of the resulting buffer relative to the \(pK_a\) of \(\text{HA(aq)}\)?
| Solution | Concentration | Volume |
|---|---|---|
| \(\text{HA(aq)}\) | \(0.300\text{ M}\) | \(50.0\text{ mL}\) |
| \(\text{NaOH(aq)}\) | \(0.100\text{ M}\) | \(50.0\text{ mL}\) |
The \(\text{OH}^-\text{(aq)}\) reacts completely with \(\text{HA(aq)}\) according to \(\text{HA(aq)}+\text{OH}^-\text{(aq)}\rightarrow\text{A}^-\text{(aq)}+\text{H}_2\text{O(l)}\). Which of the following correctly predicts the pH of the resulting buffer relative to the \(pK_a\) of \(\text{HA(aq)}\)?
Similar Questions
Tools for a 5
AP aligned mock tests to help you get a 5.
With grading, adaptive explanations, and more.
Find a Quiz
Find, solve, and grade every AP FRQ ever.
Find an FRQ
Stuck on AP Chemistry? Get unstuck with an AP specialist.1 to 1 tutors who know the exam inside out. Understand weeks of material in a single session.Book a SessionSee all our elite tutors
Learn AP Physics from scratch, quickly. This is the only course you'll need for the year.
A self-paced course with everything you need to get a 5. Trusted by over 15,000 students and 200+ schools. Learn fast, or we'll refund your purchase, backed by our 100% satisfaction guarantee.
Explore the Course