CHEM
WA 05_CHE-121-jan18.docx

WA 05_CHE-121-jan18.docx - Name Robert Velat College ID...

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Name: Robert Velat College ID: 0254046 Thomas Edison State University General Chemistry I with Labs (CHE-121) Section no.: Module 5 Semester and year: JUN2018 Written Assignment 5: Chemical Reactions in Solution Answer all assigned questions and problems and show all work. All solutions are in BOLD print. 1. Define electrolyte and nonelectrolyte and identify each of the following substances as a strong electrolyte, weak electrolyte, or nonelectrolyte: (5 points) An electrolyte is a substance that when dissolved in a solution does conduct electricity. A nonelectrolyte is a substance that when dissolved in a solution does not conduct electricity a. H 2 O Nonelectrolyte 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 AgS O 4 + NaN O 3 Balanced Equation: 2 AgN O 3 + N a 2 SO 4 → A g 2 S O 4 + 2 NaN O 3 Ionic Equation: ¿ ( aq ) + ¿ ( aq ) + 2 N O 3 ¿ 2 ¿ ( aq ) → A g 2 SO 4 ( s ) + 2 N a ¿ + ¿ ( aq ) + SO 4 ¿ ¿ ( aq ) + 2 N a ¿ + ¿ ( aq ) + 2 N O 3 ¿ 2 A g ¿ Net Ionic Equation: 2 ¿ ( aq ) → A g 2 SO 4 ( s ) + ¿ ( aq ) + SO 4 ¿ 2 A g ¿ 1 Copyright © 2017 by Thomas Edison State University . All rights reserved.
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b. BaCl 2 + ZnSO 4 Ba SO 4 + ZnC l 2 Also the balanced equation Ionic Equation: ¿ ( aq ) 2 + ¿ ( aq ) + 2 C l ¿ 2 ¿ ( aq ) → BaSO 4 ( s ) + Z n ¿ 2 + ¿ ( aq ) + SO 4 ¿ ¿ ( aq ) + Z n ¿ 2 + ¿ ( aq ) + 2 C l ¿ Ba ¿ Net Ionic Equation: 2 ¿ ( aq ) → BaSO 4 ( s ) 2 + ¿ ( aq ) + S O 4 ¿ Ba ¿ c. (NH 4 ) 2 CO 3 + CaCl 2 CaC O 3 + 2 N H 4 Cl 2 Also the balanced equation Ionic Equation: + ¿ ( aq ) ¿ ( aq )+ 2 C l ¿ ¿ →CaC O 3 ( s ) + 2 N H 4 ¿ 2 + ¿ ( aq ) + 2 C l ¿ 2 ¿ ( aq ) + Ca ¿ ¿ ( aq ) + C O 3 ¿ 2 N H 4 ¿ Net Ionic Equation: 2 + ¿ ( aq ) →CaC O 3 ( s ) 2 ¿ ( aq ) + C a ¿ C O 3 ¿ d. NaNO 3 + KCl NaCl + KN O 3 Also balanced equation Ionic Equation: ¿ ( aq ) →NaCl ( aq ) + KN O 3 ( aq ) + ¿ ( aq ) + C l ¿ ¿ ( aq ) + K ¿ + ¿ ( aq ) + N O 3 ¿ N a ¿ No Net Ionic Equation as all elements are soluble. (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) Separation of K + from Ag + ions when we added chloride ions Cl - then AgCl is insoluble and will precipitate out while KCl being soluble will remain in the solution.
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