Calculating HCl Molarity and Titration Error
In determining the concentration of HCl by titrating against the primary weak base TRIS, the molarity of HCL is calculated using the following equation where GFW is the gram formula weight of […]
Analytical Problem Exchange
Use the problems in this forum to jump-start your in-class exercises, out-of-class assignments, or use them in exams.
Uncertainity in Dispensing a Reagent
Concentrated HCl is 37.2% w/w HCl (±0.5% w/w) and has a density of 1.19 g/mL (±0.01 g/mL). Suppose that you need to dispense 0.0500 mol of HCl with an uncertainty of no […]
Concentration of Parathion Solutions
Parathion, C10H16NO5PS, is a toxic organophosphorous pesticide. A recently published method [Sacks, et al. Anal. Chem. 2000, 72, 2055-2058] for parathion reports a detection limit of 10 ng/mL. Express this concentration in […]
Concentrations
Gratzel et. al. [Anal. Chem. 1999, 71, 2751-2756] describe the use of a diffusional microburet to transfer solutions to very small droplets of solvent. The purpose of their work is to run […]