Chemistry Test 2 for Chemistry 1035: October 20, 2008 - Prof. Patricia G. Amateis, Exams of Chemistry

Download Chemistry Test 2 for Chemistry 1035: October 20, 2008 - Prof. Patricia G. Amateis and more Exams Chemistry in PDF only on Docsity! Chemistry 1035 Test 2 October 20, 2008 THIS IS FORM C Name __________________________ c = 3.00 x 108 m/s h = 6.63 x 10-34 J s R = 1.10 x107 m-1 Choose the single best answer to each question. 1. How many nitrate ions are present in 602 mL of 0.455 M Al(NO3)3? 1. 1.48 × 1024 nitrate ions 2. 1.65 × 1023 nitrate ions 3. 4.95 × 1023 nitrate ions 4. 8.22 × 1023 nitrate ions 2. Which of the following reactions results in a precipitate? 1. BaCl2(aq) + Na2SO4(aq) 2. KOH(aq) + Li3PO4(aq) 3. Ca(NO3)2(aq) + K2S(aq) 4. LiOH(aq) + CaCl2(aq) 3. Select the net ionic equation for the reaction between iron (III) chloride and potassium carbonate 1. 2Fe2+ (aq) + 6Cl-(aq) + 6K+(aq) + 3CO32-(aq) → Fe2(CO3)3(s) + 6 KCl(aq) 2. 2Fe2+(aq) + 3CO32-(aq) → Fe2(CO3)3(s) 3. 2Fe2+ (aq) + 6Cl-(aq) + 6K+(aq) + 3CO32-(aq) → Fe2(CO3)3(aq) + 6 KCl(s) 4. K+(aq) + Cl-(aq) → KCl(s) 4. What, if any, are the spectator ions when aqueous solutions of lead(II) nitrate and sodium sulfate react? 1. Pb2+(aq), SO42-(aq) 2. Pb2+(aq), NO3-(aq) 3. Na+(aq), NO3-(aq) 4. Na+(aq), SO42-(aq) 5. There are no spectator ions in this reaction. 5. Which of the following is a weak electrolyte? 1. NaOH 2. C2H6O 3. KBr 4. HC2H3O2 5. HClO4 6. Potassium chloride, KCl, sodium sulfate, Na2SO4, glucose, C6H12O6, carbon dioxide, CO2 and ammonium phosphate, (NH4)3PO4, are soluble in water. Which one produces the largest number of dissolved particles per mole of dissolved solute? 1. KCl 2. Na2SO4 3. C6H12O6 4. CO2 5. (NH4)3PO4 7. Select the net ionic equation for the reaction between potassium hydroxide and hydrobromic acid. 1. K+(aq) + OH-(aq) + H+(aq) + Br-(aq) → H2O(l) + KBr(aq) 2. HBr(aq) → H+(aq) + Br-(aq) 3. K+(aq) + Br-(aq) → KBr(aq) 4. H+(aq) + OH-(aq) → H2O(l) 5. KOH(aq) → K+(aq) + OH-(aq) 8. What is the hydroxide ion concentration [OH-] in a solution whose pH is 5.62? 1. 4.5 x 10-4 M 2. 4.2 x 10-9 M 3. 2.4 x 10-6 M 4. 3.8 x 10-7 M 9. Which of the following solutions is the least acidic? 1. pH = 2.55 2. pOH = 11.3 3. [H+] = 1.1 x 10-3 M 4. [OH-] = 1.2 x 10-12 M