EXPERIMENT #21: AN ACID-BASE TITRATION CURVE THROUGH pH MEASUREMENTS Post-Lab -3

Question

EXPERIMENT #21: AN ACID-BASE TITRATION CURVE THROUGH pH MEASUREMENTS Post-Lab -3.5 Points After completing the experiment for Lab 21 "An Acid-Base Titration Curve Through pH Measurements," meet with your assigned group of 3-4 to complete the post-experiment assignment. Refer to information provided in the lab manual, instructor notes, and experiment report sheets to help answer the following application questions. I. Discussion of Error-3.5 points 1. The pH meter was calibrated using standard buffer solutions. Does it matter how close the pH meter's readings are to these pH values? In other words, would it significantly affect any of the final answers? 2. Knowing the exact concentrations of the acid and base are irrelevant in the determination exaut concetations of K,. Why is this true? t rnt rrelevant in the determnatun of

Explanation / Answer

The titration curve is a plot of pH change during course of titration vs the volume of titration added. The titration curve of acid base reaction is a typical S shaped curve where the pH shows sharp increase at the equivalence point. Hence, to plot the titration curve the accurate pH value is not required but the trend of change in pH is important. This leads to the conclusion that it doesn't matter how close the pH meter value is to the pH value of buffer. i. e. It would not significantly affect the final answer.

Related Questions

Navigate

• Browse (All)
• Browse E
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.