Questions from General Chemistry

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

Using the R.I.C.E. table method, calculate the activities of all hydrogen sulfide species for a solution containing c0 = 3.80 10−4 mol dm−3 dihydrogen sulfide H2S(a...

Q: Variation 1. Using Chem EQL, simulate the pH of a

Variation 1. Using Chem EQL, simulate the pH of a solution containing c0 = 3.80 10−4 mol dm−3 sulfide S2– and an ionic strength of Ic = 3 10−2 mol dm−3. NOTE: There are two more variations of this exe...

Q: Simulate the dissolution of gypsum: CaSO4 2 H2O(s),

Simulate the dissolution of gypsum: CaSO4 2 H2O(s), saving both the input matrix file (.txt) and the output file (.xls). Validate the ion activity coefficients γ2± and the gypsum ion activity product...

Q: Simulate hydroxyapatite : Ca5(PO4)3OH(s) solubility

Simulate hydroxyapatite : Ca5(PO4)3OH(s) solubility in the pH range: 4 ≤ pH ≤ 9. Save both the input file (.txt) and the output file (.xls) for the simulation. Plot the total solution phosphate concen...

Q: Simulate troilite : FeS(s) solubility in the pH range

Simulate troilite : FeS(s) solubility in the pH range: 4 ≤ pH ≤ 9. Save both the input file (.txt) and the output file (.xls) for the simulation.

Q: Simulate total soluble lead (Pb) in a 3-phase

Simulate total soluble lead (Pb) in a 3-phase system consisting of an aqueous solution in equilibrium with the phosphate minerals hydroxyapatite : Ca5(PO4)3OH(s) and pyromorphite : Pb5(PO4)3OH(s). Sav...

Q: A reactor accident occurred in Chernobyl, Ukraine in 1986 that deposited

A reactor accident occurred in Chernobyl, Ukraine in 1986 that deposited 55 137

Q: Simulate the 4-phase system consisting of an aqueous solution in

Simulate the 4-phase system consisting of an aqueous solution in solubility equilibrium with the following three minerals: calcite : CaCO3(s), hydroxyapatite : Ca5(PO4)3OH(s), and pyromorphite : Pb5(P...

Q: The Chem EQL Solid Phase Library contains the following entry for the

The Chem EQL Solid Phase Library contains the following entry for the calcium phosphate mineral fluorapatite : Ca10(PO4)6F2(s). Calculate the equilibrium coefficient Kc for this reaction using the D...

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

The Chem EQL database Solid Phase Library (i.e., mineral species formation reactions and equilibrium solubility constants) contains the following entry for the mineral calcite : CaCO3(s). Using the...