10. A student obtained the following data in determining the solubility of a substance.

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1 1. According to Reference Table G, which of these substances is most soluble at 60ºC? 1) NaCl 2) KCl 3) KClO 3 4) NH 4 Cl 2. Solubility data for four different salts in water at 60 C are shown in the table below. 5. Which of the salts listed below is most soluble at 60ºC? 1) NaNO 3 2) KNO 3 3) NH 4 Cl 4) KCl 6. According to Table F, which of these salts is least soluble in water? 1) LiCl 2) RbCl 3) FeCl 2 4) PbCl 2 7. A student tested the solubility of a salt at different temperatures and then used Reference Table g to identify the salt. The student's data table appears below. Which salt is most soluble at 60 C? 1) A 3) C 2) B 4) D 3. According to Reference Table F, which compound is most soluble? 1) AgBr 2) PbCl 2 3) AgI 4) CaCl 2 4. As the temperature increases from 0ºC to 25ºC the amount of NH 3 that can be dissolved in 100 grams of water 1) decreases by 10 grams 3) increases by 10 grams 2) decreases by 40 grams 4) increases by 40 grams What is the identity of the salt? 1) potassium nitrate 3) potassium chlorate 2) sodium chloride 4) ammonium chloride 8. According to Reference Table F, which substance is most soluble? 1) AgI 2) CaSO 4 3) PbCl 2 4) (NH 4 ) 2 CO 3 9. Based on Reference Table F, which salt is least soluble? 1) FeCO 3 2) Na 2 CO 3 3) BaCl 2 4) CaCl 2

2 10. A student obtained the following data in determining the solubility of a substance. 12. Given the diagram below that shows carbon dioxide in an equilibrium system at a temperature of 298 K and a pressure of 1 atm: Which graph best represents the solubility curve drawn from the results obtained by the student? 1) 2) 3) 4) 11. According to Reference Table F, which of these compounds is most soluble at 298 K and 1 atm? 1) PbCl 2 2) AgCl 3) PbCrO 4 4) PbCO 3 Which changes must increase the solubility of the carbon dioxide? 1) increase pressure and decrease temperature 2) increase pressure and increase temperature 3) decrease pressure and decrease temperature 4) decrease pressure and increase temperature 13. A gas is most soluble in a liquid under conditions of 1) high temperature and high pressure 2) high temperature and low pressure 3) low temperature and high pressure 4) low temperature and low pressure 14. Based on Reference Table G, which of the following substances is most soluble at 60ºC? 1) NH 4 Cl 2) KCl 3) NaCl 4) NH Which compound decreases in solubility as the temperature of the solution is increased from 10ºC to 50ºC? 1) NH 4 Cl 2) NaCl 3) NH 3 4) NaNO The attraction between water molecules and an Na + ion or a Cl ion occurs because water molecules are 1) linear 3) polar 2) symmetrical 4) nonpolar 17. Based on Reference Table F, which of the following compounds is least soluble in water? 1) NaCl 2) Pb 2 ClO 3 3) Na 2 CrO 4 4) PbCrO The solubility of a salt in a given volume of water depends primarily on the 1) surface area of the salt crystals 2) temperature of the water 3) rate at which the salt and water are stirred 4) pressure on the surface of the water

3 19. According to Reference Table G, which of the following substances is least soluble in 100 grams of water at 50ºC? 1) NaCl 3) NH 4 Cl 2) KCl 4) HCl 20. The graph below represents four solubility curves. Which curve best represents the solubility of a gas in water? 27. In an aqueous solution of potassium chloride, the solute is 1) Cl 2) K 3) KCl 4) H 2 O 28. According to Reference Table G, how many grams of KNO 3 would be needed to saturate 200 grams of water at 70ºC? 1) 43 g 3) 134 g 2) 86 g 4) 268 g 29. A student determined the mass, in grams, of compound X that would saturate 30. grams of water over a temperature range of 40.ºC in 10.-degree intervals. The results are tabulated below. 1) A 3) C 2) B 4) D 21. Which of the following compounds is least soluble in water? 1) copper (II) chloride 3) iron (III) hydroxide 2) aluminum acetate 4) potassium sulfate 22. When PbI 2 (s) is added to Na 2 CO 3 (aq), a white precipitate is formed. According to Reference Table F, the white precipitate most likely is 1) KNO 3 2) PbCO 3 3) NaI 4) Na 2 CO A change in pressure would have the greatest effect on the solubility of a 1) solid in a liquid 3) liquid in a liquid 2) gas in a liquid 4) liquid in a solid 24. Based on Reference Table F, which of the following saturated solutions would be the least concentrated? 1) sodium sulfate 3) copper (II) sulfate 2) potassium sulfate 4) barium sulfate 25. Which compound is most soluble in water? 1) silver acetate 3) silver nitrate 2) silver chloride 4) silver sulfate 26. As the pressure on a gas confined above a liquid increases, the solubility of the gas in the liquid 1) decreases 3) remains the same 2) increases If this solubility trend continues, what is the total number of grams of compound X that will dissolve in 30. grams of water at 60.ºC? 1) 16 3) 48 2) 32 4) At room temperature, the solubility of which solute in water would be most affected by a change in pressure? 1) methanol 3) carbon dioxide 2) sugar 4) sodium nitrate 31. According to Reference Table F, which compound is most soluble in water? 1) BaCO 3 2) BaSO 4 3) ZnCO 3 4) ZnSO Based on Reference Table G, what change will cause the solubility of KNO 3 (s) to increase? 1) decreasing the pressure 2) increasing the pressure 3) decreasing the temperature 4) increasing the temperature 33. According to the Reference Table G, which of the following substances is least soluble in 100 grams of H 2 O( ) at 50ºC? 1) KCl 3) NH 4 Cl 2) NaCl 4) HCl 34. Carbon dioxide gas is most soluble in water under conditions of 1) high pressure and low temperature 2) high pressure and high temperature 3) low pressure and low temperature 4) low pressure and high temperature

4 35. Based on Reference Table G, what is the maximum number of grams of KCl(s) that will dissolve in 200 grams of water at 50 C to produce a saturated solution? 1) 38 g 3) 58 g 2) 42 g 4) 84 g 36. Which salt has the greatest change in solubility between 30ºC and 50ºC? 1) KNO 3 3) NaNO 3 2) KCl 4) NaCl 37. According to Reference Table G, which compound's solubility decreases most rapidly when the temperature increases from 50ºC to 70ºC? 1) NH 3 2) HCl 3) SO 2 4) KNO A 2.00-liter sample of a gas has a mass of 1.80 grams at STP. What is the density, in grams per liter, of this gas at STP? 1) ) ) ) A student obtained the following data in a chemistry laboratory. Based on Reference Table g, which of the trials seems to be in error? 1) 1 3) 3 2) 2 4) According to Reference Table G, how does a decrease in temperature from 40 C to 20 C affect the solubility of NH 3 and KCl? 1) The solubility of NH 3 decreases, and the solubility of KCl decreases. 2) The solubility of NH 3 decreases, and the solubility of KCl increases. 3) The solubility of NH 3 increases, and the solubility of KCl decreases. 4) The solubility of NH 3 increases, and the solubility of KCl increases. 41. Based on Reference Table G, which of the following substances is most soluble at 50 C? 1) KClO 3 2) NH 3 3) NaCl 4) NH 4 Cl 42. At which temperature can water contain the most dissolved oxygen at a pressure of 1 atmosphere? 1) 10.ºC 3) 30.ºC 2) 20.ºC 4) 40.ºC 43. According to Reference Table G, what is the approximate difference between the amounts of KClO 3 and KNO 3 soluble in 100 grams of water at 40ºC? 1) 17 g 3) 47 g 2) 22 g 4) 64 g 44. At STP, which of these substances is most soluble in H 2 O? 1) CCl 4 2) CO 2 3) HCl 4) N Which compound is least soluble in 100 grams of water at 40 C? 1) SO 2 2) NaCl 3) KClO 3 4) NH 4 Cl 46. According to Reference Table G, a temperature change from 10 C to 30 C would have the least effect on the solubility of 1) NaCl 2) KClO 3 3) NH 3 4) SO 2

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