Recent Tutoring Session Reviews
"We covered acid naming (oxyacids... ic acid comes from ate ending) and went over buffers and common ion effect problems. We saw an application of the Henderson-Hasselbalch equation, and looked at how to tell if a salt solution is acidic or basic (and how to calculate that with numbers). We started to look at titrations again. The student told me that she got a B+ on her last test! Next time we will do more with titrations."
"This past session, the student and I got straight to work on new material. We covered the first of four handouts which will be tested in the next unit. The topics included evolution in general as well as the theory of natural selection. We discussed the basic differences between the following concepts - Micro vs Macro evolution, Lamarckian vs Darwinian evolution, and Biological vs Chemical evolution. She was able to answer quiz questions correctly over all the major concepts if given multiple choice but I hope to get her fluent enough to answer questions without apparent choices from memory. So far, she seems to be demonstrating better understanding of this chapter and we are able to move through material more quickly so I anticipate that these improvements will translate into higher test scores in the near future."
"Today, we started discussing about buffer systems and selective precipitation of ions. We discussed how buffer systems work, how addition of acids and bases to buffer solutions change the pH, and how to use Henderson-Hasselbalch equations to calculate change in pH and concentrations of conjugate acids and bases. With respect to selective precipitation of ions, we discussed how to use solubility product to determine which ion precipitates first from a mixture of ions. We also discussed how to calculate solubility product and calculate concentration of ions from solubility product. I gave her practice problems about buffer systems to solve. Thursday, we will continue with solving more problems about buffer systems and precipitation of ions."