17.2 Acid-Base Titrations and Titration Curves | General Chemistry скачать в хорошем качестве

17.2 Acid-Base Titrations and Titration Curves | General Chemistry

Chad provides an introduction to titrations and titration curves. The lesson begins with a description of a Strong Acid / Strong Base titration curve. The terms analyte, titrant, equivalence point, and indicator are all introduced and defined. It is explained how a the titration of a strong acid with a strong base produces water and a neutral salt explaining why the pH is equal to 7 at the equivalence point. An example calculation of the concentration of the analyte from the equivalence point is performed. Next, a description of a Weak Acid / Strong Base titration is provided including the fact that the pH is greater than 7 at the equivalence point as the products are water and a basic salt. Also described is the half-equivalence point where half the amount of titrant required to reach the equivalence point has been added. At this point the concentration of the conjugate acid is equal to that of the conjugate base. According to the Henderson-Hasselbalch equation, pH = pKa and pOH = pKb and this point in the titration can be used to quickly approximate the pKa of a weak acid or the pKb of a weak base. Finally, a description of a Weak Base / Strong Acid titration is provided including the fact that the pH is less than 7 at the equivalence point as the products are water and an acidic salt. Just as in the Weak Acid / Strong Base titration, the half-equivalence point can be used to quickly approximate the pKa of a weak acid or the pKb of a weak base. I've embedded this playlist as a course on my website with all the lessons organized by chapter in a collapsible menu and much of the content from the study guide included on the page. Check this lesson out at https://www.chadsprep.com/chads-gener... If you want all my study guides, quizzes, final exam reviews, and practice exams, check out my General Chemistry Master Course at https://www.chadsprep.com/genchem-you... 00:00 Lesson Introduction 00:59 Strong Acid-Strong Base Titration Curve 11:53 Weak Acid-Strong Base Titration Curve 23:16 Weak Base-Strong Acid Titration Curve https://www.chadsprep.com/