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14.2 Algorithmic Questions 1) Which of the following compounds will be most soluble in nonane (C9H20)? A) pentanol (CH3CH2CH2CH2CH2OH) B) benzene (C6H6) C) acetic acid (CH3CO2H) D) ethyl methyl ketone (CH3CH2COH3) E) None of these compounds should be soluble in pentane. 2) Identify the compounds that are soluble in both water and hexane. A) methanol and 1-pentanol B) ethanol and 1-butanol C) 1-propanol and 1-butanol D) 1-butanol and 1-pentanol E) ethanol and 1-propanol 3) Which of the following ions should have the most exothermic ΔHhydration? A) Na? B) Ba2? C) Al3? D) Ca2? E) Sr2? 4) Which cation in each set is expected to have the larger (more negative) hydration energy? I Be2+ or Ca2+ II Rb+ or Zn2+ A) Be2+ in set I and Rb+ in set II B) Be2+ in set I and Zn2+ in set II C) Ca2+ in set I and Rb+ in set II D) Ca2+ in set I and Zn2+ in set II 5) The Henry’s Law constant of methyl bromide, CH3Br, is k = 0.159 mol/(L ? atm) at 25°C. What is the solubility of methyl bromide in water at 25°C and at a partial pressure of 270. mm Hg? A) 0.0565 mol/L B) 0.355 mol/L C) 0.448 mol/L D) 42.9 mol/L 6) The Henry’s law constant for helium gas in water at 30°C is 3.70 × M/atm. When the partial pressure of helium above a sample of water is 0.650 atm, the concentration of helium in the water is ________ M. A) 5.69 × 10-4 B) 1.76 × 103 C) 1.30 D) 2.41 × 10-4 E) 3.70 × 7) Dynamic equilibrium can be defined as A) rate of dissolution = rate of deposition. B) rate of dissolution < rate of deposition. C) rate of dissolution > rate of deposition. D) rate of bubbling > rate of dissolving E) rate of condensing > rate of bubbling 8) Dissolving can be defined as A) rate of dissolution = rate of deposition. B) rate of dissolution < rate of deposition. C) rate of dissolution > rate of deposition. D) rate of bubbling > rate of dissolving E) rate of condensing > rate of bubbling 9) Identify the compound whose solubility is least affected by temperature. A) K Cl B) K2Cr2O7 C) NaNO3 D) Pb(NO3)3 E) NaCl 10) Identify the compound whose solubility decreases with increasing temperature. A) Na2SO4 B) K2Cr2O7 C) NaNO3 D) KClO3 E) CaCl2

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