WA 05_CHE-121-jan18.docx - Name College ID Thomas Edison State University General Chemistry I with Labs(CHE-121 Section no Semester and year Written

WA 05_CHE-121-jan18.docx - Name College ID Thomas Edison...

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Name: College ID: Thomas Edison State University General Chemistry I with Labs (CHE-121) Section no.: Semester and year: 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) a. H 2 O weak electrolyte b. KCl strong electrolyte c. HNO 3 strong electrolyte d. CH 3 COOH weak electrolyte e. C 12 H 22 O 11 nonelectrolyte (Reference: Chang 4.9) 2.Write ionic and net ionic equations for the following reactions: (8 points) a. AgNO 3 + Na 2 SO 4 → AgSO 4 + NaNO 3 2AgNO 3 + Na 2 SO 4 → Ag 2 SO 4 + 2NaNO 3 2Ag + (aq) + 2NO 3 - (aq) + 2Na + (aq) + SO 4 2- (aq) → Ag 2 SO 4 (s) + 2Na + (aq) + 2NO 3 - (aq) 2Ag + (aq) + SO 4 2- (aq) → Ag 2 SO 4 (s) b. BaCl 2 + ZnSO 4 → BaSO 4 (s) + ZnCl 2 Ba 2+ (aq)+ 2Cl - (aq)+ Zn 2+ (aq) + SO 4 2- (aq) → BaSO 4 (s) + Zn 2+ (aq) + 2Cl - (aq) Ba 2+ (aq) + SO 4 2- (aq) → BaSO 4 (s) c. (NH 4 ) 2 CO 3 + CaCl 2 2NH 4 Cl (aq) + CaCO 3 (s) 2NH 4 + (aq) + CO 3 2- (aq) + Ca 2+ (aq) + 2CL - (aq) 2NH 4 + (aq) + 2CL - (aq) + CaCO 3 (s) Ca 2+ (aq) + CO 3 2- (aq) CaCO 3 (s) d. NaNO 3 + KCl → NaCl -- + KNO 3 Na + (aq) + NO 3 - (aq) + K + (aq) + Cl - (aq) → Na + (aq) + Cl - (aq) + K + (aq) + NO 3 - (aq) No Net Ion Equation because of no reaction. (Reference: Chang 4.21) 1 Copyright © 2017 by Thomas Edison State University . All rights reserved.
3.With reference to Table 4.2, suggest one method by which you might separate (a)Kfrom Ag+, (b)Ba2+from Pb2+, (c)NH4+from Ca2+, and (d)Ba2+from Cu2+. All cationsare assumed to be in aqueous solution, and the common anion is the nitrate ion. (8 points) + a)Add Chloride ions. b)Add Hydroxides ionsc)Add Carbonates ionsd)Add Sulfate ions (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 = -2 m. P F 6- = +5 n. Au Cl 4- = +3 (Reference: Chang 4.47) 2 Copyright © 2017 by Thomas Edison State University . All rights reserved.

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