WA05_CHE-121-May2016 - Written Assignment 5 Chemical Reactions in Solution Answer all assigned questions and problems and show all work 1 Define

WA05_CHE-121-May2016 - Written Assignment 5 Chemical...

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Written Assignment 5: Chemical Reactions in Solution Answer all assigned questions and problems, and show all work. 1.Define electrolyte and nonelectrolyte and identify each of the following substances as a strong electrolyte, weak electrolyte, or nonelectrolyte: (5 points) 2. Write ionic and net ionic equations for the following reactions: (8 points) a. AgNO 3 + Na 2 SO 4 AgNO 3 (aq) + Na 2 SO 4 (aq) Ag 2 SO 4 (aq) + 2NaNO 3 (aq) 2AgNO 3 (aq) + Na 2 SO 4 (aq) Ag 2 SO 4 (aq) + 2NaNO 3 (aq) 2Ag +1 (aq) + NO 3 -1 (aq) + 2Na +1 (aq) + SO 4 -2 (aq) 2Ag +1 (aq) + SO 4 -2 (aq) + 2Na +1 (aq) + 2NO 3 -1 (aq) b. BaCl 2 + ZnSO 4 Ba 2+ (aq) + SO 4 2- (aq) BaSO 4 (s) Ba 2+ (aq) + 2 Cl - (aq) + Zn 2+ (aq) + SO 4 2- (aq) BaSO 4 (s) + Zn 2+ (aq) + 2 Cl - (aq) c. (NH 4 ) 2 CO 3 + CaCl 2 Ca 2+ (aq) + CO 3 2- (aq) CaCO 3 (s) 2NH 4 1+ (aq) + CO 3 2- (aq) + Ca 2+ (aq) + 2Cl 1- (aq) 2NH 4 1+ (aq) + 2Cl 1- (aq) + CaCO 3 (s) d. NaNO 3 + KCl 1 Copyright © 2014 by Thomas Edison State College. All rights reserved.
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NaNO 3 + KCl NaCl + KNO 3 Na + + NO 3- + K + + Cl - K + + NO 3- + Na + + Cl - The ionic net equation cancels out because both are soluble in water (Reference: Chang 4.21) 3. With reference to Table 4.2, suggest one method by which you might separate (a) K + from Ag + , (b) Ba 2+ from Pb 2+ , (c) NH 4 + from Ca 2+ , and (d) Ba 2+ from Cu 2+ . All cations are assumed to be in aqueous solution, and the common anion is the nitrate ion. (8 points) a) add NaCl b) add NaF c) add NaOH d) add NaF (Reference: Chang 4.24) 4. Give the oxidation number of the underlined atoms in the following molecules and ions: (7 points) a. Cl F = 1+ b. I F 7 = 7+ c. C H 4 = 4- d. C 2 H 2 = 1- e. C 2 H 4 = 2- f. K 2 Cr O 4 = 6+ g. K 2 Cr 2 O 7 = 6+ h. KMn O 4 = 7+ i. NaHC O 3 = 4+ j. O 2 = 0 k. NaI O 3 = 5+ l. K 2 O = -1/2 m. P F 6 = 6+ n. Au Cl 4 = 3+ (Reference: Chang 4.47) 5. For the following reactions, identify the type (combination, combustion, decomposition, displacement, methathesis [double-displacement)] neutralization), balance the reaction, and for the redox reactions identify the oxidizing agent and reducing agent. (12 points) a. CH
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