General Chemistry: Media Enhanced Edition, 8th Edition

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Names: _______ KEY ________________ CHEM 130: Disc. 215 GSI: Lauren Goodrich ____________________________ QUIZ 4 ____________________________ Show all work and report answers to the correct number of significant figures. 1. Balance the following redox reaction. Show the corresponding half reactions. (4 points) Cu(s) + 2 NO 3 - (aq) + 2 H + (aq) Cu 2+ (aq) + 2 NO 2 (g) + 4 H 2 O(l) Cu Cu 2+ 2e - (N 5+ +1e - N 4+ ) 2 What is the oxidizing agent in the above reaction? (2 points) NO 3 - 2. Sodium carbonate is reacted with calcium hydroxide to form calcium carbonate and sodium hydroxide.
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Unformatted text preview: this reaction. (3 points) molecular: Na 2 CO 3 (aq) + Ca(OH) 2 (aq) CaCO 3 (s) + 2NaOH (aq) net ionic: Ca 2+ + CO 3 2- CaCO 3 (s) If 25mL 2.2M sodium carbonate is required to completely titrate calcium hydroxide, how many milliliters of 4.0M calcium hydroxide are present? (3 points) 14mL Ca(OH) 2 3. Complete the following reaction. Balance and include all phase labels. (2 points) Na 2 SO 3 + 2 HCl 2NaCl(aq) + H 2 O(l) + SO 2 (g)...
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