What is one of the spectator ions (with correct coefficient)? A)

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1 Chem 101 Exam Fall 01 Section Based on the solubility rules Mg (PO 4 ) is A) soluble B) insoluble. An aqueous solution of potassium sulfate is allowed to react with an aqueous solution of What is one of the spectator ions (with correct coefficient)? A) SO 4 B) Pb(NO ) C) Pb D) NO E) Pb. An aqueous solution of potassium sulfate is allowed to react with an aqueous solution of The complete ionic equation contains which of the following species (with correct coefficient)? A) SO 4 B) K C) Pb D) NO E) P 4. Based on the solubility rules KOH is A) soluble B) insoluble Page 1

2 5. An aqueous solution of potassium sulfate is allowed to react with an aqueous solution of The net ionic equation contains which of the following species (with correct coefficient)? A) NH 4 B) 4 SO C) NO D) Pb E) NO 6. An aqueous solution of potassium sulfate is allowed to react with an aqueous solution of What is the coefficient of the solid in the balanced equation? A) 1 B) C) D) 4 E) 6 7. When the following equation is balanced in standard form, what is the coefficient in front of the underlined substance? C H 6 (g) + O (g) CO (g) + H O(l) A) 1 B) C) D) 4 E) 5 8. An aqueous solution of potassium sulfate is allowed to react with an aqueous solution of Identify the solid in the balanced equation. A) K SO 4 B) Pb(NO ) C) PbSO 4 D) KNO E) There is no solid formed when the two solutions are mixed. Page

3 9. What is the mass in grams of.66 moles of iron? A) g B) 16.9 g C) g D) 408 g 10. The reaction HCl(aq) + KOH(aq) H O(l) + KCl(aq) is a(n) reaction. A) precipitation B) acid-base or neutralization C) combination or synthesis D) single-replacement E) none of these 11. Based on the solubility rules PbCl is A) soluble B) insoluble 1. Based on the solubility rules LiNO is A) soluble B) insoluble 1. What is the molar mass of calcium carbonate, MgCO? A) 4.05 g B) 5.15 g C) 84.1 g D) g Use the following to answer questions 14-18: Use the following choices to classify each reaction given below. A. single replacement B. double replacement C. synthesis D. decomposition E. combustion 14. HgO(s) Hg(l) + O (g) Page

4 15. Na(s) + H (g) NaH(s) 16. C H 8 (g) + 5O (g) CO (g) + 4H O(g) 17. Zn(s) + HCl(aq) H (g) + ZnCl (aq) 18. AgNO (aq) + NaCl(aq) AgCl(s) + NaNO (aq) 19. Tin(II) fluoride is added to some dental products to help prevent cavities. Manufacturers have to make the tin(ii) fluoride first, though, before they can add it to their products. Sn(s) + HF(aq) SnF (aq) + H (g) How many moles of tin(ii) fluoride can be made from.70 moles of hydrogen fluoride if there is plenty of tin available to react? A) 7.40 moles B) 1.85 moles C).70 moles D).70 x 10 moles E) 1.00 moles 0. Which of the following is not an indication that a reaction may be happening? A) Permanent color change B) Volume decreases C) Precipitate forms D) Gas given off E) Heat or light given off 1. 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? Zn (s) + CuSO 4(aq) Cu (s) + ZnSO 4(aq) A) yes B) no Page 4

5 . 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) + MgSO 4(aq) Mg (s) + CuSO 4(aq) A) yes B) no. 4.5 mol of Al and an excess of Br are reacted according to the equation Al Br AlBr How many moles of Br are consumed in the reaction assuming 100% yield? A) 1.5 mol B). mol C).0 mol D) 4.5 mol E) 6.8 mol 4. True or false? The equation N (g) + H (g) NH (g) can be interpreted by saying that 1 mol of N reacts with mol of H to form mol of NH. A) True B) False 5. Refer to the following equation: 4NH (g) + 7O (g) 4NO (g) + 6H O(g) How many moles of oxygen gas (O ) will be required to produce 15.8 mol of NO? A) 9.0 moles B) 15.8 moles C) 1.9 moles D) 7.7 moles E).7 moles moles of hydrogen gas are reacted with oxygen gas to form water. How much oxygen gas (O ) is used up in the reaction? A) moles B) 1.00 moles C) 1.50 moles D).00 moles Page 5

6 7. Consider the reaction of magnesium metal with hydrochloric acid to produce magnesium chloride and hydrogen gas. Mg + HCl MgCl + H If.7 mol of hydrochloric acid are reacted, how many moles of hydrogen gas are produced? A) 1.86 mol B).7 mol C) 7.44 mol D) 5.7 mol 8. The rusting of iron is represented by the equation 4Fe + O Fe O. If you have a.40-mol sample of iron, how many moles of Fe O will there be after the iron has rusted completely? A) mol B) mol C) 1.0 mol D) 1.80 mol E).70 mol 9. True or false? When solutions of barium hydroxide and potassium sulfate are mixed, the net ionic equation is Ba + (aq) + SO - 4 (aq) BaSO 4 (s) because only the species involved in making the precipitate are included. A) True B) False 0. In neutralization reactions water is one of the products. A) True B) False 1. Predict the identity of the precipitate that forms when an aqueous solution of lithium hydroxide reacts with an aqueous solution of copper II chloride. A) LiCl B) CuCl C) Li OH D) Cu OH E) Cu(OH) Page 6

7 . 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. A 0.87 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 Page 7

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9 Answer Key 1. B. D. B 4. A 5. D 6. A 7. B 8. C 9. C 10. B 11. B 1. A 1. C 14. D 15. C 16. E 17. A 18. B 19. B 0. B 1. A. B. E 4. A 5. D 6. A 7. A 8. C 9. A 0. A 1. E. D. B Page 9