Chem101_SampleTest2Rev1

Chem101_SampleTest2Rev1 - Chemistry 101-2 Fall 2007 Sample...

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Chemistry 101-2 Fall 2007 Sample Test No. 2 I (60 POINTS). Multiple Choice. Encircle the letter of the best answer. NOTE: In the actual exam, there will be 20 questions each worth 3 points. 1) A strong electrolyte is one that __________ completely in solution. A) reacts B) decomposes C) disappears D) ionizes 2) Which of the following are weak electrolytes? 1) HCl 2) 2 3 2 HC H O 3) 3 NH 4) KCl A) HCl, KCl B) HCl, 2 3 2 HC H O , 3 NH , KCl C) 2 3 2 HC H O , KCl D) 2 3 2 HC H O , 3 NH E) HCl, 2 3 2 HC H O , KCl 3) Combining aqueous solutions of 2 BaI and 2 4 Na SO affords a precipitate of 4 BaSO . Which ion(s) is/are spectator ions in the reaction? A) 2+ Ba only B) + Na only C) 2+ Ba and 2- 4 SO D) + Na and - I E) 2- 4 SO and - I 4) The balanced net ionic equation for precipitation of 3 CaCO when aqueous solutions of 2 3 Na CO and 2 CaCl are mixed is __________. A) + 2- 3 2 3 2Na (aq) + CO (aq) Na CO (aq) h B) + - 2Na (aq) + 2Cl (aq) 2NaCl (aq) h C) + - Na (aq) + Cl (aq) NaCl (aq) h D) 2+ 2- 3 3 Ca (aq) + CO (aq) CaCO (s) h E) 2 3 2 3 Na CO (aq) + CaCl (aq) 2NaCl (aq) + CaCO (s) h 5) Which hydroxides are strong bases? 2 Sr(OH) KOH NaOH 2 Ba(OH) A) KOH, 2 Ba(OH) B) KOH, NaOH C) KOH, NaOH, 2 Ba(OH) D) 2 Sr(OH) , KOH, NaOH, 2 Ba(OH) E) None of these is a strong base. 1
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6) You are given two clear solutions of the same unknown monoprotic acid, but with different concentrations. Which statement is true? A) There is no chemical method designed to tell the two solutions apart. B) It would take more base solution (per milliliter of the unknown solution) to neutralize the more concentrated solution. C) A smaller volume of the less concentrated solution contains the same number of moles of the acid compared to the more concentrated solution. D) If the same volume of each sample was taken, then more base solution would be required to neutralize the one with lower concentration. E) The product of concentration and volume of the less concentrated solution equals the product of concentration and volume of the more concentrated solution. 7)
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This note was uploaded on 04/27/2008 for the course CHEM 101 taught by Professor Lazo during the Fall '08 term at Clark University.

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Chem101_SampleTest2Rev1 - Chemistry 101-2 Fall 2007 Sample...

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