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Unformatted text preview: C111 Homework 5 FALL 2010 Name __________________________ 14 pts total. Due Wednesday. Oct. 13 by 5 pm Answer Key will be posted after that time. 1. (1.2 pts) Complete and balance the following reactions. They all have a gas phase product. a) CaCO 3 (s) + HCl (aq) ? b) ZnS (s) + HC 2 H 3 O 2 (aq) c) NH 4 I (aq) + Ca(OH) 2 (aq) d) Li 2 SO 3 (aq) + HClO 4 2. (0.8 pt) Determine the oxidation state of the element indicated in each of the following compounds and ions. a) arsenic in Na 3 AsO 4 b) manganese in KMnO 4 c) chromium in CrO 4 2- d) carbon in oxalate ion, C 2 O 4 2- 3. (1 pt) Consider the following reaction and answer the questions. 2 Mg (s) + Br 2 (l) MgBr 2 (s) (a) Which element is gaining electrons ? How many electrons are gained by each atom of this element? (b) What element is losing electrons? How many electrons are lost by each atom of this element? (c) What element is the oxidizing agent? 4. (1 pt) What is the maximum amount of AlCl 3 that could theoretically be made if the masses of each...
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