“Global Chemistry Teacher | Expert in IB, IGCSE, A-Level | Inspiring Curious Minds”

The Student and Tutor reviewed fundamental chemistry concepts, including Lewis structures and different types of chemical bonds (ionic, covalent, and coordinate covalent bonds). The session introduced and applied VSEPR theory to predict molecular shapes, with the Student working through examples. They also briefly re-examined a complex stoichiometry problem from a previous class and agreed to continue practicing similar problems in the next session.

The Student and Tutor engaged in an extensive practice session covering quantitative chemistry concepts, including calculations related to moles, molecules, molarity, average atomic mass from isotopes, and empirical/molecular formulas. They also began working on a stoichiometry problem, which will be revisited in the next class along with limiting reagents before introducing new topics.

Student and Tutor had an introductory chemistry lesson focusing on thermochemistry. They reviewed fundamental concepts such as energy forms, the law of conservation of energy, state functions, endothermic/exothermic processes, internal energy, and enthalpy. The session concluded with a detailed breakdown of a multi-step calorimetry problem to calculate total energy change, with a plan to address more assignment questions in future classes.

The Student and Tutor engaged in a comprehensive review of numerical problems in Chemistry. They covered various concepts including molecular mass, mass percentage, empirical formula, limiting reagents, isotopic mass, parts per million, and molarity calculations. The Student requested to continue with revision on these topics in the next session to ensure full understanding.

The Student and Tutor reviewed calculations for molarity and molality. They then learned about and practiced determining empirical and molecular formulas from elemental percentages and molar masses, including a multi-element example. A revision session focusing on practice problems for all covered topics, including isotopes, was planned for the next class.

The Student and Tutor reviewed fundamental chemistry concepts, including the mole concept, mole fraction, molarity, and molality. They extensively practiced applying the definitions and formulas for mole fraction, molarity, and molality through several numerical problems. The session concluded with a discussion of an integrated problem connecting mole fraction to molality.