Dr. Rick Fletcher. Clearly print your name in the name section of the Scantron answer sheet.

Transcription

1 Dr. Rick Fletcher Exam 2 Chemistry 101 March 7, 2011 Clearly print your name in the name section of the Scantron answer sheet. Clearly place your student ID number in the SUBJECT section of the Scantron sheet. Maintain appropriate security over your exam. Do not let others see your answers. There is only one most correct response to each of the multiple choice questions. Choose the best answer. Each of the twenty-five questions is worth 4 points. Since the Scantron sheets will not be returned to you, please work through the entire exam and circle the best answer on this exam. Mark this exam as you work the problems then transfer the responses to the Scantron sheet all at one time. This is the best way to reduce errors. Use pencil on the Scantron sheets and make certain to fully erase any changes you make. Use this exam to check your answers on the key that will be posted online cm = 1 in 454 g = 1 lb 946 ml = 1 qt 5280 ft = 1 mile 16 oz = 1 lb 4 qt = 1 gal heat = (sp. Ht.) X (mass) X ( Temp) T (K) = T ( o C) T( o F) = (1.8 X T( o C)) cal = J

2 1. Which one of the following net ionic equations correctly represents the reaction that may occur between solutions of lead(ii) nitrate and magnesium iodide? A) Pb 2+ (aq) + 2I 1- (aq) PbI 2 (s) B) Mg 2+ (aq) + 2NO 3 1- (aq) Mg(NO 3 ) 2 (s) C) no reaction D) 2Pb + (aq) + I 2- (aq) Pb 2 I(s) 2. A nonmetal atom that gains an electron is known as a(n) A) cation. B) sodium ion. C) anion. D) onion. 3. Which one of the following does not exist as a diatomic in its standard state? A) phosphorus B) fluorine C) hydrogen D) nitrogen 4. Which one of the following represents a decomposition reaction? A) Cr(s) + O 2 (g) Cr 2 O 3 (s) B) C 2 H 4 (g) + H 2 (g) C 2 H 6 (g) C) 2KClO 3 (s) 2KCl(s) + 3O 2 (g) D) Fe(NO 3 ) 2 (aq) + Na 2 S(aq) FeS(s) + 2NaNO 3 (aq) 5. A major league pitcher can throw a fastball at 43 m/sec. How fast is his fastball in miles per hour? A) 89 mph B) 96 mph C) 62 mph D) 75 mph 6. Given the following reaction, identify the spectator ions. AgNO 3 (aq) + BaCl 2 (aq) AgCl(s) + Ba(NO 3 ) 2 (aq) A) Ag + and NO 3 1- B) Ba and Cl C) Ag and Cl D) Ba 2+ and NO 3 1-

3 7. The alkaline earth metals are found in A) Group IIB B) Group IB C) Group IIA D) Group IA 8. How many elements are in the 4 th period of the periodic table? A) 32 B) 2 C) 26 D) Which one of the following is an incorrect chemical formula for a lead(iv) compound? A) Pb 3 (PO 4 ) 4 B) PbCl 4 C) PbO 2 D) PbO 10. Which one of the following single replacement equations will result in a reaction? A) Fe(s) + ZnCl 2 (aq) B) Ag(s) + PbCl 2 (aq) C) Au(s) + CuCl 2 (aq) D) Sn(s) + CuCl 2 (aq) 11. Which of the below formula units is correct for the compound sodium oxide? A) SO 2 B) Na 2 O C) NaO D) ONa The coefficients required in the equation, Al + BaO Al 2 O 3 + Ba, are (from left to right) A) 2, 3, 1, 3 B) 2, 3, 3, 1 C) 3, 2, 1, 2 D) 4, 6, 2, 6

4 13. What is present in a bottle containing a solution that is labeled (NH 4 ) 2 Cr 2 O 7 (aq)? A) NH 4 1+, Cr 2 O 7 2-, H 2 O B) (NH 4 ) 2 1+, Cr 2 O 7 2-, H 2 O C) NH 4, Cr 2 O 7, water D) N, H, Cr, O, H 2 O 14. Of the halogens, which one is a solid at standard temperature? A) bromine B) fluorine C) iodine D) chlorine 15. Aqueous solutions of cesium chlorate and iron(ii) nitrate are poured together and allowed to react. What is the identity of the precipitate, if one is produced? A) This reaction does not produce a precipitate. B) CsNO 3 C) Fe(ClO) 2 D) Fe(NO 3 ) Determine the charge on the arsenate ion (AsO 4 ±? ) in Ca 3 (AsO 4 ) 2. A) 6 B) 5 C) 3 D) What is the charge of phosphide ions? A) +3 B) 3 C) 5 D) At room temperature, which one of the following exists in the liquid state? A) Cl 2 B) Cd C) Hg D) S 8

5 19. A solution that contains both positive and negative ions dissolved in water is commonly referred to as A) an aqueous solution. B) an ionic solvent. C) a liquid solution. D) a heterogeneous mixture. 20. Which one of the following common laboratory compounds is named incorrectly? A) calcium carbonate, CaCO 3 B) potassium chloride, PCl 3 C) ammonium nitrate, NH 4 NO 3 D) nitric acid, HNO Naphthalene(C 10 H 8 ), better known as mothballs, undergoes a combustion reaction with oxygen to form carbon monoxide and water. What is the coefficient in front of oxygen? A) 3 B) 7 C) 10 D) How many oxide ions are required to neutralize a strontium (Sr) ion? A) 1 B) 2 C) 3 D) not enough information 23. Which one of the following is not a match? A) CO 3 2- and carbonite ion B) CaCl 2 and calcium chloride C) NH 4 NO 3 and ammonium nitrate D) FeS and iron(ii) sulfide 24. Which one of the following single replacement equations will result in no reaction? A) K(s) + NaCl(aq) B) Al(s) + ZnCl2(aq) C) Ba(s) + NaCl(aq) D) Zn(s) + KCl(aq)

6 25. What is the chemical name for CuO? A) copper (I) oxide B) copper oxide C) copper monoxide D) copper (II) oxide 26. Please indicate you are taking Version A of this exam by marking the A response on QUESTION 26 ON THE REVERSE SIDE OF THE SCANTRON SHEET. Failure to do this will invalidate your responses.