Recent Tutoring Session Reviews
"Today we reviewed reactivity and mechanism of radical halogenation of alkanes, selectivity, reactivity of the halogens, reactivity of alkanes based on methyl, primary, secondary, or tertiary carbons, hyperconjugation, why benzyl radicals more stable than most alkyl radicals. We then started an introduction to stereochemistry and strategies for drawing a 3D molecule on paper."
"I am not sure if this is going to be our last session or not so I covered as much material as possible. The student is starting titration so we went over the common ion effect. In doing so, we addressed what molar solubility was and how a substance, if put into a solution where there already exists a common ion, there will be a reduction in its molar solubility. We also went into finding percent dissociation of an acid. I then showed her an example of how the percent dissociation goes down in a common ion effect (simply combining the two concepts). Next, we went over buffers. She has her ICE tables down very well, so we just needed a little clarification on what a buffer is actually made of and how, for example, a weak base and it's conjugate base salt resists changes in pH. The next step would be to introduce the Henderson Hasselbalch equation, but she already is familiar and uses it well. We went over how to make a buffer at a particular pH given the Ka values of acids. Then we went over titration and equivalence points, end points, and how we determine molarity of an unknown acid or base from these. I explained how you find the right indicator and lab questions she may go over. I quickly explained how Ksp and complex ion formation is related to everything we've going over. The concept is still the same, we are just now dealing with solids."
"During this session we went over ionic and covalent bonds. We focused on the differences between these two types of bonds. We then practiced naming both covalent and ionic compounds. The student has a strong understanding of the general naming schemes. We then reviewed some of the properties of waves. We discussed transverse and longitudinal waves and reviewed several of their properties. We considered the amplitude, wavelength, frequency, period, and speed of waves and noted how some of these characteristics interact."