In a solution containing NaCl with an initial concentration of 0.1M, calculate the activity coefficient (y) for Na+ when the ionic strength is increased to 0.5M using the Debye - Hückel equation.
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- Calculate the DHLL activity coefficient for Cl- or Fe3+in a solution of FeCl3 that is 0.1 m in concentration. Suppose you dissolve NaCl in a 0.1 m HCI solution so that the final concentration of the salt is 0.2 m NaCl. What will be the DHLL activity coefficients for Na+, H+, and Cl-?An equimolar solution of ammonium sulfate, sodium chloride and magnesium nitrate has an ionic strength of 0.14 M. What is the molar concentration of the solution with respect to each solute? O 0.020 M O 0.025 M O 0.10 M O 0.015 MCalculate the molar ionic strength of a 0.6800 M copper (II) sulfide solution.
- Complete the following solubility constant expression for Co(OH)2. K = sp X ŚFind the activity coefficient of H in a solution containing 0.010 M HCl plus 0.040 M KClO4. What is the pH of the solution?Calculate the activity of the bromide ion in a solution that is 0.050M KBr, 0.050M NaBr, and 0.050M HBr.
- 12. The following quantities of salts were added to a volume of water to make 1 liter of solution: 1 x 10-2 moles NaCl 2 x 10-2 moles CaCl, 2 x 10-2 moles BaCl, (a) What is the ionic strength of the solution? (b) A small amount of phosphate salt is added to the same solution with negligible change in ionic strength. Given K = 10-7.2 for the reaction H,PO, = H+ + HPO,?- Calculate (H*][HPO,2-1/[H,PO,"), called °K, using the Güntelberg ap- proximation of the DeBye-Hückel law. (c) Calculate the "salting-out" coefficient, k,, for a nonelectrolyte in the same solution if its activity is 10-3 M and its concentration is 9.5 x 10 4 M.One approach for removing dissolved nickel from water is to precipitate it as NiS(s). The standard molar Gibbs energies of Ni²+, NiS(s), and HS are -45.6, -86.2, and 12.0 kJ/mol, respectively. The standard molar Gibbs energy of H* is zero (0.0 kJ/mol) by definition. Use the given thermodynamic data to compute the equilibrium constant for the following reaction: Ni²+ ← → NIS(s) + HS + H+Calculate the molar enthalpy of dissolution ΔsHm of the reaction.