1 Introduction to Analytical Separations ±Extraction: the transfer of a solute from one phase to another. ±To isolate the desired analyte ±To concentrate the desired analyte ±To separate the desired analyte form interferences. 2 Recall! 1. Concentrations of solutes should be expressed as moles per liter. 2. Concentrations of gases should be expressed in bars. 3. Concentrations of pure solids, pure liquids, and solvents are omitted because they are unity. 3 Ex. Equilibrium Constant The equilibrium constant for the reaction H2O ±H++ OH±is called Kw(= [H+][OH±]) and has the value 1.0 ²10±14at 25°C. Given that KHN3= 1.8 ²10±5, for the reaction NH3(aq) + H2O ±NH4++ OH±, find Kfor the reaction NH4+±NH3(aq) + H+.
has intentionally blurred sections.
Sign up to view the full version.