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12. The lity of lead(Il) fluoride, PbFs, in pure water is 2.1 x 10 moles per liter. Calculate the value of Kg for lead(lI) fluoride from this data. a. 1.3× 10.7 b. 1.9 x 10 c. 3.7 x 10 d. 1.6×10-9 e, 9.3×10-9 13. In an experiment, it is planned to add 300 mL of 2.0 x 10 M AgNO, to 300 mL. of 2.0 x 10° M Nal. Will a precipitate form? What is the precipitate? Kop (Agl) -8.3 x 101 a. yes, the ppt is AgNOs(s) b. yes, the ppt is NaNO (s) c. yes, the ppt is Nal(s) d. yes, the ppt is Agl(s) e. no 14. For the reaction 2NO(g)+ O-(g)- 2NO:(g), AH--113.1 kJ/mol. Which of these statements is true? The reaction is spontaneous at all temperatures. a. b. The reaction is only spontaneous at low temperatures. The reaction is only spontaneous at high temperatures. c. d. The reaction is nonspontaneous. The reaction is at equilibrium at 25°C under standard conditions. Using the standard free energies of formation: Calculate the standard free energy change, AG, for the reaction: e. 15. Baco,(s) + SO3(g) → BaSOds) + COdg) Hint: See Data page) a. +189.6 kJ mol b. -238.4 kJ mol c. +472.4 kJ mol d. +238.4 kJ mol e. -2516.4 kJ mol
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The solubility of lead(II) fluoride, PbF_2, in pure water is 2.1 times 10^-3 moles per liter....
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