Recent Tutoring Session Reviews
"Continued to work on late assignments and improving overall grade. The focus of many problems were stoichiometry and then several in a kinetics unit dealing with energy. Heat of formation and vaporization and bond energies were covered. A few assignments dealt with molarity. The student and I also worked on a few of the lab assignments, constructing hypotheses, dealing with theoretical vs experimental yield, and finally writing results, error analysis and conclusion. We were able to look at the grades of each assignment and attempt to bring the grade back up to full credit."
"Today we finished up the last few homework questions for this week's assignment and then did extra practice problems to prepare the student for her quiz on Thursday. The remaining homework problems covered VSEPR and polarity of molecules. She did well with the Lewis dot structures and converting them into the appropriate "3-D" representation. She also did well identifying geometry and shape of a molecule. She clearly understood electronegativity and the dipole bond concepts but putting it all together in a molecule was confusing for her. To address this issue, we did several extra practice problems from the chapter on VSEPR and polarity. For all problems I had her draw the Lewis structure, then identify the geometry, shape, and bond angles. Then I had her draw the dipole arrows for any dipole bonds and identify if the molecule was polar or non-polar. We talked through the various instances in which a molecule would be polar versus non-polar. By the end of our session, she had a much clearer concept of polarity and was doing very well identifying whether a molecule was polar or not. Initially, she was unclear on the C-H bonds and kept thinking it was a polar bond, but we cleared up that misunderstanding which helped tremendously in getting her to understand polarity of various molecules. I think she is well prepared for her quiz."
"Covered study packets of topics to be covered on the chemistry exam. Acids/bases, electro-chemistry, organic chemistry, moles and ideal gas law were the main topics covered."
"We reviewed atomic structure, the history of atomic theory, isotopes, mass numbers, atomic numbers, charge, and calculating the average atomic mass of an element based on percent abundance and mass numbers. The student did quite well, as we had already reviewed this on Sunday - he resubmitted a quiz for 100%. Nice work."
"We reviewed concepts related to food chemistry, naming organic compounds, talking about renewable fuels, and balancing combustion reactions. Aside from minor technical difficulties, the session went well."
"We reviewed dimensional analysis, stoichiometry, percent yield, empirical and molecular formulas, and balancing equations. We went over her review sheet and a previous exam to prepare for her test tomorrow. She didn't struggle, but we went over the meaning behind different key words to better clarify what the question is asking and how she can get there. She did a lot better this time with identifying given information and needed information and the general steps to do the problem. I gave her a couple links to websites for more information on empirical and molecular formulas and a device to remember which elements exist at diatomic elements: Have No Fear Of Ice Cold Beer (H, N, F, O, I, Cl, B). I didn't leave her with extra practice, but I encouraged her to continue studying and practicing the stoichiometry problems on her own. This will be her first test and hopefully she does well!"