Chem 101 Practice Exam 3 Fall 2012 You will have a Solubility Table and Periodic Table
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1 Chem 101 Practice Exam Fall 01 You will have a Solubility Table and Periodic Table 1. A 1.6-mol sample of KClO was decomposed according to the equation KClO (s) KCl(s) O (g) How many moles of O are formed assuming 100% yield? A) 1.1 mol B) 1. mol C) 1.6 mol D) 0.8 mol E).4 mol. A 1.6-mol sample of KClO was decomposed according to the equation KClO (s) KCl(s) O (g) How many moles of KCl are formed assuming 100% yield? A) 1.1 mol B) 1. mol C) 1.6 mol D) 0.8 mol E).4 mol. 4.5 mol of Al and an excess of Br are reacted according to the equation Al Br AlBr How many moles of AlBr will be formed assuming 100% yield? A) 1.5 mol B). mol C).0 mol D) 4.5 mol E) 6.8 mol 4. The rusting of iron is represented by the equation 4Fe + O Fe O. If you have a 1.64-mol sample of iron, how many moles of O will be needed to completely react the iron? A) 1. mol B).19 mol C).8 mol D) 1.64 mol Page 1
2 5. The balanced equation P 4 (s) + 6H (g) 4PH (g) tells us that.0 mol H A) reacts with 1.0 mol P 4 B) produces 4.0 mol PH C) cannot react with phosphorus D) produces 1. mol PH E) reacts with.0 mol P 4 6. When a precipitation reaction occurs, the ions that do not form the precipitate A) evaporate B) are cations only C) form a second insoluble compound in the solution D) are left as ions in the solution E) none of these 7. Refer to the following equation: 4NH (g) + 7O (g) 4NO (g) + 6H O(g) How many moles of ammonia (NH ) will be required to produce 11.6 mol of water? A) 4.64 mol B) 11.6 mol C) 7.7 mol D) 5.80 mol E) none of these 8. What type of reaction is H O H + O A) Combustion B) Precipitation C) Double replacement D) Neutralization E) Decomposition 9. What type of reaction is NaCl (aq) + AgNO (ag) NaNO (aq) + AgCl (s) A) Combustion B) Precipitation C) Double replacement D) Neutralization E) Decomposition Page
3 10. An aqueous solution of sodium carbonate is reacted with an aqueous solution of calcium chloride. Identify the solid in the balanced equation. A) Na CO B) CaCl C) NaCl D) CaCO E) There is no solid formed when the two solutions are mixed. 11. An aqueous solution of sodium carbonate is reacted with an aqueous solution of calcium chloride. What is the coefficient of the solid in the balanced equation (in standard form)? A) 5 B) 4 C) D) E) 1 1. An aqueous solution of sodium carbonate is reacted with an aqueous solution of calcium chloride. The net ionic equation contains which of the following species (when balanced in standard form)? A) CO ( aq ) B) Na ( aq ) C) Cl ( aq ) D) Cl ( aq ) E) Ca ( aq ) Page
4 1. An aqueous solution of potassium chloride is mixed with an aqueous solution of sodium nitrate. The net ionic equation contains which of the following species (when balanced in standard form)? A) K ( aq ) B) NO ( aq ) C) KNO ( aq ) D) Na ( aq ) E) No net ionic equation exists for this reaction. 14. This question is blank 15. An aqueous solution of sodium carbonate is reacted with an aqueous solution of calcium chloride. The complete ionic equation contains which of the following species (when balanced in standard form)? A) Na ( aq ) B) CO ( aq ) C) Na ( aq ) D) Cl ( aq ) E) Ca ( aq ) 16. This question is blank 17. Considering the activity series Ca, Mg, Zn, Fe, Cu where Ca is the most reactive metal and Cu is the least reactive metal would the following reaction take place? Cu (s) + ZnSO 4(aq) Zn (s) + CuSO 4(aq) A) yes B) no 18. Considering the activity series Ca, Mg, Zn, Fe, Cu where Ca is the most reactive metal and Cu is the least reactive metal would the following reaction take place? Ca (s) + FeSO 4(aq) Fe (s) + CaSO 4(aq) A) yes B) no Page 4
5 19. True or false? The equation O (g) + Mg(s) MgO(s) can be interpreted by saying that 1 mol of O reacts with mol of Mg to form mol of MgO. A) True B) False 0. True or false? Spectator ions are not included in a net ionic equation. A) True B) False 1. An endothermic reaction takes in heat. A) True B) False. An aqueous solution of potassium chloride is mixed with an aqueous solution of sodium nitrate. The complete ionic equation contains which of the following species (when balanced in standard form)? A) K ( aq ) B) NO ( aq ) C) Cl ( aq ) D) Na ( aq ) E) KNO ( aq ). Classify the following reaction: Mg(s) + O (g) MgO(s) A) combination or synthesis B) precipitation C) acid-base D) single displacement E) double displacement Page 5
6 4. An aqueous solution of ammonium sulfate is allowed to react with an aqueous solution of lead(ii) nitrate. The net ionic equation contains which of the following species (when balanced in standard form)? A) NH ( aq ) 4 B) 4 SO ( aq ) C) NO ( aq ) D) Pb ( aq ) E) NO ( aq ) 5. Based on the solubility rules BaSO 4 is A) soluble B) insoluble 6. Based on the solubility rules Mg(NO ) is A) soluble B) insoluble 7. CH 4 (g) + O (g) CO (g) + H O(g) A) acid-base B) synthesis C) decomposition D) combustion E) single replacement 8. Predict the identity of the precipitate that forms when an aqueous solution of sodium hydroxide reacts with an aqueous solution of iron(iii) chloride. A) No precipitate forms B) NaCl C) Na Fe D) Fe OH E) Fe(OH) 9. Which of the following is a single replacement reaction? A) Pb + O PbO B) PbSO 4 + ZnCl ZnSO 4 + PbCl C) CH 4 + O CO + H O D) NiN Ni + N E) CuSO 4 + Zn ZnSO 4 + Cu Page 6
7 Chem 101 Useful Information 1 Kg = 1000 g 1 cal = J 1 L = 1000 ml T( C) + 7 = T(K) T( F) = 1.80(T C) + 0 C = 7 K Specific heat of water = 1 cal/g/ C 1 mol of gas at STP =.4 Liters Standard Temperature and Pressure = 0 C and 1 atmosphere 1 atmosphere = 760 torr (1 atm = 760 mm Hg) 1 atm = psi R = L atm/mol K Ideal Gas Law: PV = nrt P 1 V 1 = P V P1V 1 PV = T 1 T V 1 V = T 1 T E = hν h = 6.66 x 10-4 J s P 1 P = 1 T T C = λν C =.00 x 10 8 m/s Avogadro's number = 6.0 x 10 Activity Series for Metals Li, K, Ba, Ca, Na, Mg, Al, Mn, Zn, Cr, Fe, Co, Ni, Sn, Pb, H, Cu, Ag, Hg, Pt, Au Most Active Least Active XI
8 Chem 101 Useful Information Nomenclature Flow Chart Nonmetal name with ide ending Name the polyatomic ion + 1 nonmetal + nonmetals Name the metal Single-Charge Metal Indicate metal charge by (Roman #) or Latin name (-ous or ic) Multiple-Charge Metal * Metal + Nonmetal Chemical Formula Nonmetals H + Nonmetal(s) 1. Use Greek prefixes to indicate subscripts. Second element ide ending Name as acids *Treat NH 4 + as a metal when naming compounds XI
9 Answer Key Chem 101 Practice Exam Fall E. C. D 4. A 5. D 6. D 7. C 8. E 9. B or C 10. D 11. E 1. A 1. E 14. This question is blank 15. C 16. This question is blank 17. B 18. A 19. A 0. A 1. A. C. A 4. D 5. B 6. A 7. D 8. E 9. E Page 7
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