Alkalinity: Equilibrium and Applications

This lecture by the instructor covers the concept of alkalinity in open and closed systems, focusing on the equilibrium concentrations of different species and their impact on pH. The lecture discusses the measurement of alkalinity, the dissolution of CaCO3, and the effects of various processes on alkalinity levels. It also explores the conservative properties of alkalinity and its relationship with acidity. Practical exercises are provided to apply the theoretical concepts, such as determining pH changes after adding different compounds to water with known alkalinity. The lecture concludes with key points emphasizing the importance of carbonate/bicarbonate in natural water systems and the utility of alkalinity as a conservative parameter for understanding equilibrium conditions.