Questions from General Chemistry

Q: The Maxfield soil series (Olmsted County, MN) has a

The Maxfield soil series (Olmsted County, MN) has a cation exchange capacity CEC of nσ +/m = 41.0 cmolc kg−1 balanced by nσ Ca2+ /m = 39.5 cmolc kg−1 of exchangeable Ca2+ and nσ Na+ /m = 1.5 cmolc kg−...

Q: The Bssyz2 horizon of the Duke soil series (Fine, mixed

The Bssyz2 horizon of the Duke soil series (Fine, mixed, active, thermic Sodic Haplusterts; Harmon County, OK) is 64.7% clay, has the following chemical properties (NCSS Pedon ID: S2003OK-057-006):...

Q: Quirk and Schofield (1955) measured Na+, Ca2+ exchange

Quirk and Schofield (1955) measured Na+, Ca2+ exchange by a vermiculite dominated soil clay fraction collected at Rothamsted Experiment Station (Harpenden, U. K.). The results are listed. Use the leas...

Q: The clay fraction of the Two top soil series (Crook County

The clay fraction of the Two top soil series (Crook County, Wyoming) is predominantly smectite with a reported cation exchange capacity CEC of nσ /m = 76.4 cmolc • kg−1. An asymmetric Ca2+, K+ cation...

Q: The Chem EQL database Solid Phase Library (i.e.,

The Chem EQL database Solid Phase Library (i.e., equilibrium solubility constants for mineral species) contains the following entries for the carbonate minerals calcite : CaCO3(s) and dolomite : Ca Mg...

Q: List the half-life of the longest-lived isotope for

List the half-life of the longest-lived isotope for each element from Po to Th (84 < Z < 90). A complete Table of the Isotopes is available on the Abundances of the Elements (Kaye and Laby Tables of P...

Q: Install Chem EQL and simulate the chemistry of a 10−

Install Chem EQL and simulate the chemistry of a 10−5 mol dm−3 phthalic acid solution at pH 5 (cf. Chem EQL Manual, example simulation of 10−3 mol dm−3 acetic acid solution at pH 4). Save the input fi...

Q: Install Chem EQL and simulate the chemistry of a 10−5

Install Chem EQL and simulate the chemistry of a 10−5 mol dm−3 phthalic acid solution at pH 5 without setting mode(H+) = free. Save the input matrix file (.txt) and the output file (.xls) and perform...

Q: The standard free energies of formation ∆f tt−◦ (298

The standard free energies of formation ∆f tt−◦ (298.15 K) for each component in the fluorapatite : Ca5(PO4)3F(s) solubility reaction appear in...

Q: Using the R.I.C.E. table method

Using the R.I.C.E. table method, calculate the pH of a solution containing c0 = 3.80 • 10−4 mol • dm−3 dihydrogen sulfide H2S(aq...