eng-spring07-q204s

eng-spring07-q204s - 4. (3 pts) Is the following reaction...

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CHEM 151: Quiz 4 NAME ____________KEY ___________ ID #_______________ Show your work for full credit Eng Q204 If you do not know the compound formula(e), Dr. Eng will give you the formula(e) at a cost of 1 point per compound. For problems 1 – 2, please use the following answers to state the driving force for the listed reactions of the following aqueous solutions. (a) gas formation (b) formation of a weak/non-electrolyte (c) precipitate formation (d) the reaction does not occur 1. (3 pts) The reaction of iron (III) sulfide with nitric acid. A. sulfide + acid yields a gas (H 2 S) Fe 2 S 3 (s) + 6 HNO 3 (aq) 3 H 2 S (g) + 2 Fe(NO 3 ) 3 (aq) 2. (3 pts) The reaction of perchloric acid and potassium hydroxide. B. strong acid + strong base yields salt + water (non-electrolyte) HClO 4 (aq) + KOH (aq) KClO 4 (aq) + H 2 O (l) 3. (3 pts) A gas will form when hydroiodic acid is added to an aqueous solution of _______. (a) ammonium chloride (b) iron (III) sulfate (c) copper (II) nitrate (d) zinc carbonate carbonate + acid yields a gas (CO 2 )
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Unformatted text preview: 4. (3 pts) Is the following reaction product or reactant -favored? Circle one. NaCl (aq) + Fe 2 S 3 (s) FeCl 3 (aq) + Na 2 S (aq) 5. (6 pts) Determine the oxidation state of the listed element in the given compound. i. S in S 6 0 (elemental forms are zero) ii. O in ClO 4--2 (O is normally -2 unless it is with F or a peroxide) iii. H in LiH -1 (H is normally positive one, but with a metal it is negative one) 6. (7 pts) Write the balanced, total, and net ionic equations for the reaction of aqueous ammonium carbonate with aqueous calcium acetate. Also, identify the spectator ions. (NH 4 ) 2 CO 3 (aq) + Ca(C 2 H 3 O 2 ) 2 (aq) 2 NH 4 C 2 H 3 O 2 (aq) + CaCO 3 (s) Balanced eqn 1 pt 2 NH 4 + (aq) + CO 3 2-(aq) + Ca 2+ (aq) + 2 C 2 H 3 O 2-(aq) 2 NH 4 + (aq) + 2 C 2 H 3 O 2-(aq) + CaCO 3 (s) Total ionic eqn 4 pts (1 pt per each compound) Spectator ions are NH 4 + (aq) and C 2 H 3 O 2-(aq) 1 pt ( each ion) CO 3 2-(aq) + Ca 2+ (aq) CaCO 3 (s) Net ionic eqn 1 pt...
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This note was uploaded on 07/10/2011 for the course CHM 2045 taught by Professor Eng during the Fall '10 term at UNF.

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