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Sunitha and Ifadha discussed chemical contaminants and salts in water, including their sources, health effects, and methods for sampling and analysis. They covered heavy metals, bioaccumulation, hard water, and salinity testing. The next session will focus on analytical techniques for quantifying these substances, including calculations related to mole concepts.

Sunitha provided comprehensive chemistry instruction on complex redox reactions with transition metals. The lesson covered balancing half equations and full redox equations. The learner, who resides in The Bronx, then delved into the reactivity series of metals, displacement reactions, and predicting reaction outcomes. They practiced writing balanced equations and discussed further problem-solving practice.

Sunitha provided comprehensive chemistry instruction to a student from Southwestern College in Chula Vista across two lessons. The initial lesson delved into acids and bases, covering reactions, pH, acid strength and concentration, interactions with metal compounds, conjugate pairs, and real-world applications. The subsequent lesson focused on redox reactions, emphasizing balancing equations, identifying oxidation/reduction through electron transfer, writing half-equations, pinpointing oxidizing and reducing agents, and constructing overall balanced equations. Both lessons incorporated practice problems and examples to solidify the learner's understanding.

Sunitha and Ifadha reviewed acids and bases, focusing on reaction types, equation balancing, and identifying spectator ions. Ifadha practiced writing balanced chemical and ionic equations and predicting reaction products. They discussed real-world applications of acid-base chemistry and the impact of ocean acidification, with plans to continue discussing ocean acidity in the next session.

Sunitha and Fathima practiced calculations involving pH, concentration, and dilution of acids and bases. They worked through problems involving strong acids and bases, molarity calculations from mass and volume, and dilution calculations using C1V1 = C2V2. Fathima is expected to review textbook questions and will reschedule the next class for Wednesday due to travel.

Sunitha and Ifadha reviewed acid-base chemistry, covering Bronsted-Lowry definitions, strong and weak acids/bases, pH calculations, and the use of indicators. Ifadha practiced identifying acids and bases in reactions and calculating pH values. They scheduled the next class for Wednesday and discussed Ifadha's potential absence on Saturday.