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Equilibrium : CommonIonEffect (9 Variations)
The molar solubility of lead(II) fluoride (PbF2) is
2.1 x 10-3 mol/L in pure water at 25oC. What is the molar solubility of lead(II) fluoride in 0.10 M NaF at 25oC? (Assume that the only relevant reaction is the solubility-product equilibrium.)
Magnetized Water: Science or Fraud?L. Lahuerta Zamora, G. M. Antón-Fos, P. A. Alemán López, and R. V. Martin Algarra Commercial water magnetizers provide a unique opportunity to help university and secondary students develop appropriate skepticism against extraordinary claims and use testing as the basis for their scientific evaluation. Lahuerta Zamora, L.; Antón-Fos, G. M.; Alemán López, P. A.; Martin Algarra, R. V. J. Chem. Educ.2008, 85, 1416.
Aqueous Solution Chemistry |
Magnetic Properties |
pH |
Titration / Volumetric Analysis |
Water / Water Chemistry
Manual Data Processing in Analytical Chemistry: Linear CalibrationDora Melucci Most science students are familiar with Excel spreadsheets, but determining which of Excels statistical functions perform a calculation equivalent to a classical equation and calculating errors with Excel are not trivial exercises. Melucci, Dora. J. Chem. Educ.2008, 85, 1346.
Calibration |
Chemometrics |
Quantitative Analysis
Helping Students Assess the Relative Importance of Different Intermolecular InteractionsPaul G. Jasien A semi-quantitative model has been developed to estimate the relative effects of dispersion, dipoledipole interactions, and H-bonding on the normal boiling points for a series of simple, straight-chain organic compounds. Application of this model may be useful in addressing student misconceptions related to the additivity of intermolecular interactions. Jasien, Paul G. J. Chem. Educ.2008, 85, 1222.
