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- 1. Calculate the activity coefficients of Ca2 + and Cl- ions in the presence of 0.0036 M CaCl and 0.04 M NaCl solution. 2.What is the solubility of CaF2 in 0.05 M NaF solution? Calculate by considering the activity coefficients of ions. Ksp = 3,9x10-11a) What is the solubility of CaF2 in 0.05 M NaF solution? Calculate by considering the activity coefficients of ions. (Ksp= 3,9×10^11)b) Calculate the activity coefficients of Ca2 + and Cl- ions in the environment of 0.0036 M CaCl2 and 0.04 M NaCl solution.For µ=0.1, the activity coefficient (gamma) of M2+ is 0.41 while gamma of X- is 0.75. Calculate how many micrograms of MX2 dissolve in 324 mL of 0.10 M NaX solution. The molar mass of MX2 is 201 g/mol, and its Ksp is 3.8 x 10-9. Note that NaX is a salt of X-, an ion that participates in the equilibrium that applies to the solubility of MX2. a. 110 µg b. 27 µg c. 9.7 µg d. 44 µg e. 1000 µg
- Find 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? Use the information in Table 12-1 (p. 269 in 4th edition of Harris text) to obtain the ion size in pm.Given the following activity coefficient data: Ion Ion Size (pm) Ionic Strength (μ, M) 0.001 0.005 0.01 0.05 0.1 Zn2+ 600 0.870 0.749 0.675 0.485 0.405 Calculate the ionic strength of a solution that is 0.0213 M Mg(CN)2. Based on your results in part 1, what is the activity coefficient of Zn2+? 3. Zinc cyanide, Zn(CN)2, has a Ksp of 3.0 x 10−16. Using the activity coefficient you calculated in part 2, find the concentration of Zn2+ in a saturated solution of Zn(CN)2 in 0.0213 M Mg(CN)2. (Note: The activity coefficient for cyanide in at this ionic strength is 0.791.)A 350.00 mL solution of 0.00265 M A3B4 is added to a 280.00 mL solution of 0.00205 M C3D2. What is pQsp for A3D4?
- Calculate the activity coefficients of Ca2 + and Cl- ions in the environment of 0.0036 M CaCl2 and 0.04 M NaCl solution.On the redox titration experiment, Standardization of Na2S2O3 with KIO3 standard solution, what can be replaced KIO3 to make safer solvent and auxiliaries( reduced toxic waste)? explain why?A solution of PbCl2 has 0.018 moles of Cl- and 0.0089 moles of Pb2+. Its Ksp = 2.88x10-6 (based on molarities), and its ionic strength = 0.027. a) What are the activity coefficients of Pb2+ and Cl-? b) Use activities of ions instead of molarities to calculate a value for the thermodynamic solubility product of the solution.
- Calculate the alkaline strength of pearl ash (impure potassium carbonate) in terms of percent K2O from the following data: Sample = 0.3500 g; HCl used = 48.03 mL; NaOH used for back titration = 2.02 mL; 1.000 mL HCl = 0.005300 g Na2CO3; 1.000 mL NaOH = 0.02192 g KHC2O4.H2O.1. What is the molar solubility of PbCl2 in a solution of 0.23 M CaCl2? Ksp = 1.6 ✕ 10-5 for PbCl2. 2. What is the Qsp when 32.0 mL of 6.50 ✕ 10-7 M Na3PO4 are mixed with 41.4 mL of 5.50 ✕ 10-5 M CaCl2? Assume the volumes are additive. Ksp = 2.0 ✕ 10-29. 3. What is the Qsp when 61.0 mL of 1.50 ✕ 10-4 M AgNO3 are mixed with 80.0 mL of 5.20 ✕ 10-3 M CaCl2? Assume the volumes are additive. Ksp = 1.6 ✕ 10-10. 4. What [I-1] is needed to start the precipitation of AgI from a saturated solution of AgCl? Ksp = 2.9 ✕ 10-16 for AgI and Ksp = 1.2 ✕ 10-10 for AgCl.A mixture of pure BaCO3 and pure Na2CO3 weighs 1.000 g and has the total neutralizing power of 15.37 meq of CaCO3. Calculate the percentage of combined CO2 in the mixture and the weight of Li2CO3 that has the same neutralizing power as 1.000 g of the above mixture.