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Unformatted text preview: E3 practice mc exam MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) Combining aqueous solutions of BaI 2 and Na 2 SO 4 affords a precipitate of BaSO 4 . Which ion(s) is/are spectator ions in the reaction? A) Na + only B) Ba 2+ only C) Ba 2+ and SO 4 2- D) Na + and I- E) SO 4 2- and I- 2) What volume (mL) of 0.135 M NaOH is required to neutralize 13.7 mL of 0.129 M HCl? A) 0.24 B) 13.1 C) 6.55 D) 0.076 E) 14.3 3) How many moles of Co 2+ are present in 0.200 L of a 0.400 M solution of CoI 2 ? A) 2.00 B) 0.160 C) 0.500 D) 0.0400 E) 0.0800 4) What is the concentration (M) of CH 3 OH in a solution prepared by dissolving 11.7 g of CH 3 OH in sufficient water to give exactly 230 mL of solution? A) 0.0841 B) 1.59 C) 11.9 10-3 D) 11.9 E) 1.59 10-3 5) Calculate the concentration (M) of sodium ions in a solution made by diluting 50.0 mL of a 0.874 M solution of sodium sulfide to a total volume of 250.0 mL. A) 0.874 B) 0.175 C) 0.525 D) 0.350 E) 4.37 6) When NaCl dissolves in water, aqueous Na + and Cl- ions result. The force of attraction that exists between Na + and H 2 O is called a(n) __________ interaction. A) ion- ion B) London dispersion force C) hydrogen bonding D) ion- dipole E) dipole- dipole 7) The phrase "like dissolves like" refers to the fact that __________. A) polar solvents dissolve polar solutes and nonpolar solvents dissolve nonpolar solutes B) condensed phases can only dissolve other condensed phases...
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- Fall '08