Recent Tutoring Session Reviews
"We covered periodic table trends like atomic and ionic radii, electronegativity, ionization energy, and metals and non-metals. We also covered bonding types like ionic, covalent and coordinate covalent bonds, inter-molecular forces like hydrogen bonding, London dispersion forces, and dipoles. We covered resonance and Lewis dot structures. She had problems understanding the resonance structures. I left her with extra practice. I have no concerns going forward."
"We had another excellent session, discussing the following: Adding/Subtracting vs. Multiplying and dividing sig figs; four properties of matter, Physical and Chemical Properties of matter, Physical vs Chemical changes, conservation of mass, Homogeneous vs. Heterogeneous mixtures, Mixture separation techniques, Elements vs Compounds, Early theories of matter with the Greeks, and John Dalton and Ernest Rutherford. He did very well."
"Today we worked on weak acid/base concepts for the test tomorrow. We went over titration curves specifically, and how to calculate the pH when a buffer solution is present. It seems like some of the concepts became a little clearer to her today - mostly with respect to buffer solutions and using the HH equation. We also talked about what happens when the buffer is no longer present - i.e. either the acid or conjugate base (or vise-versa) is used up completely - treat it as a simple weak acid/base problem and calculate the H+ or OH- concentrations from the Ka or Kb."
"The student and I prepared for her Trimester 3, Exam 1 for finals. We covered topics of concentration, dilution, stoichiometry, colligative properties, vapor pressure, freezing point depression and boiling point elevation, and Raoult's law."
"This was a good introductory session. We reviewed the basic gas laws: Boyle's, Charles', Gay Lussac, and the combined gas law. We then discussed gas, conceptually. We reviewed the concept of a mole and then introduced the constant R. R is Avogadro's gas constant and comes in different forms depending if you're pressure is in atm or kPa. Then, we use PV=nRT in order to approach each question accordingly."
"The student and I worked on algebra and chemistry during our session yesterday. We worked on a few problems in her algebra packet. She needed to finish a worksheet on rational expressions with adding/subtracting. She still has a few pages to work on in the packet, but she said that she would get additional help from her teacher during her resource time. We moved on to work on overdue chemistry homework. She completed the front side of one stoichiometry worksheet and a few problems on the back. We balanced an equation and practiced working on using the equivalency dominoes to solve problems. She worked hard to try to complete the problems. She will need to continue working on stoichiometry worksheets 1 and 2 to turn in this week."
"We covered more complex stoichiometry problems, in which you have to balance the equations, determine the moles of what is given, set up the problem (before, change, and after), and solve for what the question is asking. She struggled with converting moles and grams and how you use the stoichiometry ratio of the coefficients of the balanced equation to get the rest of the moles of the other molecules in the equation. However, I think she is getting a better grasp on these types of problems because we did many practice problems. She just needs to continue practicing these types of problems, so she can understand how she uses stoichiometry ratios. She always has a positive attitude when listening and is not afraid to ask questions when she does not understand."
"The student worked through review notes and a practice quiz in preparation for her upcoming test on solutions. She reviewed and practiced problems involving molarity, molar mass, molality and how a salt affects the freezing/boiling points of solvents, saturation, under and supersaturation, electrolyte, strong and weak electrolytes and how to use solubility to determine what will be a strong/weak/non electrolyte."
"Last night we discussed hyperbolas. The topic was just introduced to the student. He has the concept down. I gave him more practice and extended the context further. Before I left, I gave him 2 worksheets to complete. He completed half of one during the tutorial session. His Chemistry and Algebra grades have increased for the overall quarter. I feel that he is on track to have an excellent quarter."
"During this session, we continued to work on electron configuration but we also were practicing Lewis structures and ionic bonding. We spent a lot of time going over the charges of the ions that form from the different elements. This was an extra session that we were doing in order to prepare the student for a quiz the next day. She got a 91 on this quiz which is a huge improvement from how she was doing before."
"We went over some thermodynamic concepts and calculations. We used the Q=MCAT equation and reaction stoichiometry to figure out relative enthalpies and heats of reactions. We also went over Hess' Law and how to use the above equation to find information about closed chemical systems. The student was struggling the most with Hess' law at first but as soon as she heard some more details about how the law works she was quickly able to handle all of the assigned problems."
"We prepared for the test on Chapter 16. We reviewed key equations and calculations (mv=mv, molarity, molality), practiced converting units to units used in concentration calculations (chemistry word problems and stoichiometry), and went over solubility graphs and solubility changes based on temperature and pressure."