Question
Using the limiting law, calculate the mean ionic activity coefficients at $25^{\circ} \mathrm{C}$ in water of the following electrolytes at $10^{-3} m:(a) \mathrm{NaCl}$$(b) \mathrm{CaCl}_{2},(c) \mathrm{LaCl}_{3}$.
Step 1
The formula for the Debye-Hückel limiting law is: \[ \log \gamma_{\pm} = -A z_{+} z_{-} \sqrt{I} \] where: - \(\gamma_{\pm}\) is the mean ionic activity coefficient, - \(A\) is a constant that depends on the temperature and the solvent (for water at Show more…
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Estimate the mean ionic activity coefficient a) CaCl2 in an aqueous solution that is 0.01 mol/kg CaCl2 and 0.03 mol/kg NaF b) NaCl in an aqueous solution that is 0.02 mol/kg NaCl and 0.035 mol/kg Ca(NO3)2. Assume that the Debye-Hückel limiting law for the activity coefficients applies in this situation.
Calculate molar solubilities, concentrations of constituent ions, and solubilities in grams per liter for the following compounds at $25^{\circ} \mathrm{C}:$ (a) $\mathrm{CuCl}$, copper $(\mathrm{I})$ chloride: (b) $\mathrm{Ba}_{3}\left(\mathrm{PO}_{4}\right)_{2}$, barium phosphate; (c) $\mathrm{PbF}_{2}$, lead(II) fluoride; (d) $\mathrm{Sr}_{3}\left(\mathrm{PO}_{4}\right)_{2}$, strontium phosphate.
Calculate molar solubilities, concentrations of constituent ions, and solubilities in grams per liter for the following compounds at $25^{\circ} \mathrm{C}$ : (a) $\mathrm{CuCl}$, copper(I) chloride; (b) $\mathrm{Ba}_{3}\left(\mathrm{PO}_{4}\right)_{2}$, barium phosphate; (c) $\mathrm{PbF}_{2}$, lead(II) fluoride; (d) $\mathrm{Sr}_{3}\left(\mathrm{PO}_{4}\right)_{2}$, strontium phosphate.
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