Recent Tutoring Session Reviews
"Assisted student with further review for AP Bio Quiz. Discussed difference between Glycogen and Starch multiple branches/alpha glycosidic (Oxygen below rings) bonds vs Cellulose no branches/beta glycosidic (Oxygen above rings) bonds, relationship between water dissociation and pH (equilibrium constant K=10E-14 at neutral or [H+]=[OH-]=10E-7). Cautioned student that [H+] > 10E-7, i.e. 10E-1 to 10 E-6 may generally be acid but must also look at ratio to [OH-]. These seem to be more organic chemistry principles, but since student feels need to be thorough and since she seems mature and able to grasp advanced stereochemistry questions, we addressed these issues in preparation for the test."
"At our first session, the student seemed like a bright and eager student, willing to learn and improve. We worked on preparing for her test this week, covering significant figures, dimensional analysis and unit analysis, states of matter and mixtures. She struggled the most with identifying the subtle differences between types of mixtures and determining significant figures. She excelled at setting up dimensional analysis problems (though identifying the given was less easy for her) and scientific notation. I look forward to continuing working with her!"
"Briefly reviewed stoichiometry before moving into solving for empirical and molecular formula problems. I gave an example of how to approach the problem outlining the steps on how to do them. Following this, I had him practice a few from a review packet on the material. From there moved into different forms of empirical formulas problems before reviewing and practicing limiting exam problems. First session notes of weaknesses observed: he has a strong knowledge base of concepts; from what I saw tonight, his issues may revolve more around putting the concepts together to solve some of the more difficult problems (logic/critical thinking). Will see if this is the case going forward."
"Calculating valence, determining what element was oxidized and what was reduced (pick from the left, please). I also introduced how to deal with the words "oxidizing agent" (it got reduced), and reducing agent (it got oxidized). I then showed her a full scale balancing of half reactions with MnO4- (always challenging) under acidic conditions to give a balanced redox reaction, and then showed her how to do it under basic conditions (just do it under acidic), neutralize any H+ at the end by adding an equal number of OH- (to both sides, please) and cancel out any redundant waters at the end."
"Cardiac physiology was covered. We discussed SA node conductance, depolarization, funny current, calcium channels, L and t-type, and four phases of action potential. We discussed autonomic regulation of heart intrinsic rhythm, SA node and AV node, purkinje fibers, and we briefly discussed EKGs."
"We went through Cahn Ingold Prelog rules for assigning absolute configuration (R,S) for chiral centers. We discussed how to identify enantiomers and diastereomers for both Fischer projections and line/skeletal structures. We also covered the calculations for specific rotation of enantiomers and how to find the percentage of enantiomeric excess for each enantiomer. The student was given different examples to practice. By the end of session, the student was able to assign absolute configuration with confidence. The student was also confident in doing calculations regarding specific rotations."