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Unformatted text preview: Net Ionic Equations with Answers Net Ionic Equations with Answers.doc The directions for the years 1968 through 2006… Give the formulas to show the reactants and the products for the following chemical reactions. Each occurs in aqueous solution unless otherwis indicated. Represent substances in solution as ions if the substance is extensively ionized. Omit formulas for any ions or molecules that are unchange by the reaction. In all cases a reaction occurs. You need not balance. The directions for the year 2007 and present… For each of the following three reactions, in part (i) write a balanced equation for the reaction and in part (ii) answer the question about the reaction. I part (i), coefficients should be in lowest whole numbers. Assume that solutions are aqueous unless otherwise indicated. Represent substances i solutions as ions if the substances are extensively ionized. Omit formulas for any ions or molecules that are unchanged by the reaction. You may us the empty space at the bottom of the next page fro scratch work, but only equations that are written in the answer boxes provided will be graded. Example: A strip of magnesium metal is added to a solution of silver (I) nitrate. (i) Balanced equation: Mg + 2 Ag + → Mg 2+ + a Ag (ii) Which substance is oxidized in the reaction? Mg is oxidized 1968 a) iron(III) ions are reduced by iodide ions. Fe 3+ (aq) + I- (aq) => Fe 2+ (aq) + I 2 [or I 3- (aq) ] b) hydrogen sulfide is bubbled through a solution of silver nitrate. H 2 S (aq) + Ag + (aq) => Ag 2 S (s) + H + (aq) c) potassium permanganate solution is added to concentrated hydrochloric acid. MnO 4- (aq) + H + (aq) + Cl- (aq) => Mn 2+ (aq) + Cl 2 (g) + H 2 O d) concentrated (15M) ammonia solution is added in excess to a solution of copper(II) nitrate. NH 3 (aq) + Cu 2+ (aq) => [Cu(NH 3 ) 4 ] 2+ (aq) e) magnesium metal is added to dilute nitric acid, giving as one of the products a compound in which the oxidation number for nitrogen is -3. Mg (s) + NO 3- (aq) + H + (aq) => Mg 2+ (aq) + NH 4 + (aq) f) excess water is added to solid calcium hydride. CaH 2 (s) + H 2 O => H 2 (g) + Ca 2+ (aq) + OH- (aq) g) excess silver acetate is added to a solution of trisodium phosphate. AgCH 3 COO (s) + PO 4 3- (aq) => CH 3 COO- (aq) +Ag 3 PO 4 (s) [or Ag 2 HPO 4 \ AgH 2 PO 4 ] h) solid sodium cyanide is added to water. NaCN (s) + H 2 O => HCN (aq) + Na + (aq) + OH- (aq) 1969a) solid potassium hydride is added to anhydrous ethyl alcohol. KH (s) + C 2 H 5 OH => K + + C 2 H 5 O- + H 2 (g) b) lithium metal is burned in air. Li (s) + O 2 (g) => Li 2 O (s) \ Li (s) + N 2 (g) => Li 3 N (s) c) aluminum metal is added to a solution of copper(II) chloride. Al (s) + Cu 2+ (aq) => Al 3+ (aq) + Cu (s) d) liquid phosphorus trichloride is poured into a large excess of water....
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This note was uploaded on 04/09/2011 for the course CHEMICAL E 101 taught by Professor Edy during the Spring '11 term at King Fahd University of Petroleum & Minerals.
- Spring '11