Recent Tutoring Session Reviews
"We worked on more extraction problems. This time, instead of equilateral triangles we used right triangles. Also, instead of single-stage separations, we worked on counter-current cascades. This meant that we had to draw operating lines, find an operating point and step off the number of equilibrium stages. We talked in detail about two assigned problems."
"We covered the elementary unit of charge for protons and electrons and how to convert from an amount of charge to the number of electrons or protons needed to create it. We also reviewed problems involving the polarization of one or more metallic spheres by a charged rod, the concept of "electrical ground", how to determine the resultant charge of two charged metallic spheres after they've been brought into contact and then separated and the concept of potential difference. Finally we discussed the concept of electrical resistance and the atomic phenomena that creates it, and series and parallel circuits. I asked the student to review the notes and problems we went through today in preparation for any upcoming quizzes and tests."
"Today, the student was preparing for exam. We discussed about buffer solutions and solubility product of slightly soluble ionic compounds. We solved several problems. We discussed how to calculate pH and ratio of concentration of conjugate base to concentration of acid using Henderson-Hasselbalch equation. We discussed how to calculate PH during the course of titration of acids and bases, and how to calculate the volume of conjugate acids and bases from their original concentrations and pH before mixing them. We also solved solubility product problems. We discussed how to calculate Molar solubility from solubility product and in the presence of common ion. Finally, I gave her practice problems about solubility product, thermodynamics and electrochemistry."