Recent Tutoring Session Reviews
"I helped the student review reaction yields and limiting reagents. We went over a few examples, and I taught her how to do percent yield calculations. I gave the student a few practice problems and study tips. The student is well prepared for her chapter test tomorrow."
"The student and I discussed setting goals for each session to try to keep her on task, and that seemed to help. We reviewed her chemistry homework, which included the rate of reactions and the factors that influence the rate of reactions. She did well answering the questions, and I clearly explained the effects to her as we looked at each factor in detail. We also worked on algebra and writing equations in general form for the quadratic equation. She was in a good mood and seemed positive about her progress. We also discussed organization to help her stay on top of her assignments, and we will spend some time next week sorting papers into folders and helping her keep track of her papers on a weekly basis."
"The concepts covered today included: 1) Temperature versus Energy Plot for Phase Changes 2) Understanding the use of q=ms(Tf-Ti) of q=n(Hvap) in Energy calculations of phase changes - q=ms(Tf-Ti) is only used when heating or cooling a molecule - q=n(Hvap) is only used when a phase change occurs (remember temperature does not change during a phase change and that this formula is NEGATIVE when cooling a gas to a liquid (condensing) or cooling a liquid to a solid (you would use the Hfusion for liquid to solid) - Hsublimation you would use for solid to gas phase change 3) Le Chatelier's Principle A+B<->C - Increase C and then A+B will increase to balance the equilibrium - The reaction will shift to counter the change. A+B <-> C + heat - Remove heat and you will produce more C (shifting the reaction to the right) - Add A or B and you will produce more C (shifting the reaction to the left) - Add heat and you will produce more A+B (shifting reaction to left) A + 2B< -> AB2 - 3 moles of gas on left and 1 mole of gas on right - Add pressure and the reaction will shift to right where there is less moles of gas - If you reduce the pressure, the reaction will shift to the left producing more A+ 2B. 4) Algebra use in Thermochemistry -> ln (x/y) can be written as ln (x) - ln (y) -> ln (x) = y, can be written as x = e^y In reparation for next session the student will construct a list of topics that he finds difficult and we will work on practice questions."