Name: Class: Date: AP 17.4, 17.5 Study Questions True/False Indicate whether the statement is true or false. 1. The solubility product of a compound is numerically equal to the product of the concentration of the ions involved in the equilibrium, each multiplied by its coefficient in the equilibrium reaction. 2. The solubility of a slightly soluble salt is decreased by the presence of a second solute that provides a common ion to the system. 3. The solubility of slightly soluble salts containing basic anions is proportional to the ph of the solution. Multiple Choice Identify the choice that best completes the statement or answers the question. 4. The concentration of iodide ions in a saturated solution of lead (II) iodide is M. The solubility product constant of PbI 2 is 1.4 10 8. a. 3.8 10-4 b. 3.0 10-3 c. 1.5 10-3 d. 3.5 10-9 e. 1.4 10-8 5. The solubility of lead (II) chloride (PbCl 2 ) is 1.6 10 2 M. What is the K sp of PbCl 2? a. 5.0 10-4 b. 4.1 10-6 c. 3.1 10-7 d. 1.6 10-5 e. 1.6 10-2 6. The solubility of manganese (II) hydroxide (Mn(OH) 2 ) is 2.2 10 5 M. What is the K sp of Mn(OH) 2? a. 1.1 10-14 b. 4.3 10-14 c. 2.1 10-14 d. 4.8 10-10 e. 2.2 10-5 7. Determine the K sp for magnesium hydroxide (Mg(OH) 2 ) where the solubility of Mg(OH) 2 is 1.4 10-4 M. a. 2.7 10-12 b. 1.1 10-11 c. 2.0 10-8 d. 3.9 10-8 e. 1.4 10-4 Consider the following table of K sp values. 8. Which compound listed below has the greatest molar solubility in water? a. CdCO 3 b. Cd(OH) 2 c. AgI d. CaF 2 e. ZnCO 3 1
Name: 9. Which compound listed below has the smallest molar solubility in water? a. ZnCO 3 b. Cd(OH) 2 c. CdCO 3 d. AgI e. CaF 2 10. What is the molar solubility of magnesium carbonate ( MgCO 3 ) in water? The solubility-product constant for MgCO 3 is 3.5 10-8 at 25 C. a. 1.8 10-8 b. 7.0 10-8 c. 7.46 d. 2.6 10-4 e. 1.9 10-4 11. What is the molar solubility of barium fluoride ( BaF 2 ) in water? The solubility-product constant for BaF 2 is 1.7 10-6 at 25 C. a. 6.5 10-4 b. 1.2 10-2 c. 1.8 10-3 d. 7.5 10-3 e. 5.7 10-7 12. Calculate the maximum concentration (in M) of silver ions (Ag + ) in a solution that contains 0.025 M of CO 2 3. The K sp of Ag 2 CO 3 is 8.1 10 12. a. 1.8 10-5 b. 1.4 10-6 c. 2.8 10-6 d. 3.2 10-10 e. 8.1 10-12 13. What is the solubility (in M) of PbCl 2 in a 0.15 M solution of HCl? The K sp of PbCl 2 is 1.6 10 5. a. 2.0 10-3 b. 1.1 10-4 c. 1.8 10-4 d. 7.1 10-4 e. 1.6 10-5 14. The K sp for Zn(OH) 2 is 5.0 10-17. Determine the molar solubility of Zn(OH) 2 in a buffer solution with a ph of 11.5. a. 5.0 10 6 b. 1.2 10-12 c. 1.6 10-14 d. 5.0 10-12 e. 5.0 10-17 15. The molar solubility of is not affected by the ph of the solution. a. Na 3 PO 4 b. NaF c. KNO 3 d. AlCl 3 e. MnS 16. In which of the following aqueous solutions would you expect AgCl to have the lowest solubility? a. pure water b. 0.020 M BaCl 2 c. 0.015 NaCl d. 0.020 AgNO 3 e. 0.020 KCl 17. In which of the following aqueous solutions would you expect AgCl to have the highest solubility? a. pure water b. 0.020 M BaCl 2 c. 0.015 NaCl d. 0.020 AgNO 3 e. 0.020 KCl 18. In which of the following aqueous solutions would you expect AgBr to have the lowest solubility? a. pure water b. 0.20 M NaBr c. 0.10 M AgNO 3 d. 0.15 M KBr e. 0.10 M LiBr 19. In which of the following aqueous solutions would you expect AgBr to have the highest solubility? a. 0.10 M LiBr b. 0.10 M AgNO 3 c. 0.20 M NaBr d. 0.15 M KBr e. pure water 2
Name: 20. In which of the following aqueous solutions would you expect PbCl 2 to have the lowest solubility? a. 0.020 M KCl b. 0.020 M BaCl 2 c. 0.015 M PbNO 3 d. pure water e. 0.015 M NaCl 21. In which one of the following solutions is silver chloride the most soluble? a. 0.181 M HCl b. 0.0176 M NH 3 c. 0.744 M LiNO 3 d. pure water e. 0.181 M NaCl 22. Which one of the following is not amphoteric? a. Al(OH) 3 b. Ca(OH) 2 c. Cr(OH) 3 d. Zn(OH) 2 e. Sn(OH) 2 23. For which salt should the aqueous solubility be most sensitive to ph? a. Ca(NO 3 ) 2 b. CaF 2 c. CaCl 2 d. CaBr 2 e. CaI 2 24. In which aqueous system is PbI 2 least soluble? a. H 2 O b. 0.5 M HI c. 0.2 M HI d. 1.0 M HNO 3 e. 0.8 M KI 25. Which below best describe(s) the behavior of an amphoteric hydroxide in water? a. With conc. aq. NaOH, its suspension dissolves. b. With conc. aq. HCl, its suspension dissolves. c. With conc. aq. NaOH, its clear solution forms a precipitate. d. With conc. aq. HCl, its clear solution forms a precipitate. e. With both conc. aq. NaOH and conc. aq. HCl, its suspension dissolves. 26. Of the substances below, will decrease the solubility of Pb(OH) 2 in a saturated solution. a. NaNO 3 b. H 2 O 2 c. HNO 3 d. Pb(NO 3 ) 2 e. NaCl 27. Why does fluoride treatment render teeth more resistant to decay? a. Fluoride kills the bacteria in the mouth that make the acids that decay teeth. b. Fluoride stimulates production of tooth enamel to replace that lost to decay. c. Fluoride reduces saliva production, keeping teeth drier and thus reducing decay. d. Fluoride converts hydroxyapatite to fluoroapatite that is less reactive with acids. e. Fluoride dissolves plaque, reducing its decaying contact with teeth. Completion Complete each statement. 28. In general, the solubility of a slightly soluble salt is by the presence of a second solute that furnishes a common ion. 29. Although CaCO 3 has a relatively small solubility product, it is quite soluble in the presence of. 30. An assembly of a metal ion and the Lewis bases bonded to it is called a. 3
Name: 31. Metal oxides and hydroxides that are relatively insoluble in neutral water, but are soluble in both strongly acidic and strongly basic solutions are said to be. 4
AP 17.4, 17.5 Study Questions Answer Section TRUE/FALSE 1. ANS: F PTS: 1 DIF: 2 REF: Sec. 17.4 2. ANS: T PTS: 1 DIF: 2 REF: Sec. 17.5 3. ANS: F PTS: 1 DIF: 2 REF: Sec. 17.5 MULTIPLE CHOICE 4. ANS: B PTS: 1 DIF: 3 REF: Sec. 17.4 5. ANS: D PTS: 1 DIF: 3 REF: Sec. 17.4 6. ANS: B PTS: 1 DIF: 3 REF: Sec. 17.4 7. ANS: B PTS: 1 DIF: 3 REF: Sec. 17.4 8. ANS: D PTS: 1 DIF: 3 REF: Sec. 17.4 9. ANS: D PTS: 1 DIF: 3 REF: Sec. 17.4 10. ANS: E PTS: 1 DIF: 4 REF: Sec. 17.4 11. ANS: D PTS: 1 DIF: 4 REF: Sec. 17.4 12. ANS: A PTS: 1 DIF: 4 REF: Sec. 17.5 13. ANS: D PTS: 1 DIF: 4 REF: Sec. 17.5 14. ANS: D PTS: 1 DIF: 4 REF: Sec. 17.5 15. ANS: C PTS: 1 DIF: 2 REF: Sec. 17.5 16. ANS: B PTS: 1 DIF: 2 REF: Sec. 17.5 17. ANS: A PTS: 1 DIF: 2 REF: Sec. 17.5 18. ANS: B PTS: 1 DIF: 2 REF: Sec. 17.5 19. ANS: E PTS: 1 DIF: 2 REF: Sec. 17.5 20. ANS: B PTS: 1 DIF: 2 REF: Sec. 17.5 21. ANS: B PTS: 1 DIF: 3 REF: Sec. 17.5 22. ANS: B PTS: 1 DIF: 2 REF: Sec. 17.5 23. ANS: B PTS: 1 DIF: 3 REF: Sec. 17.5 24. ANS: E PTS: 1 DIF: 2 REF: Sec. 17.5 25. ANS: E PTS: 1 DIF: 3 REF: Sec. 17.5 26. ANS: D PTS: 1 DIF: 3 REF: Sec. 17.5 27. ANS: D PTS: 1 DIF: 2 REF: Sec. 17.5 COMPLETION 28. ANS: decreased PTS: 1 DIF: 2 REF: Sec. 17.5 29. ANS: acid PTS: 1 DIF: 3 REF: Sec. 17.5 1
30. ANS: complex ion. PTS: 1 DIF: 3 REF: Sec. 17.5 31. ANS: amphoteric PTS: 1 DIF: 4 REF: Sec. 17.5 2