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Preview Multiple Choice Short Answer Extended Response Chapter 8 Standardized Test Preparation.

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1 Preview Multiple Choice Short Answer Extended Response Chapter 8 Standardized Test Preparation

2 Multiple Choice 1. According to the law of conservation of mass, the total mass of the reacting substances is A. always more than the total mass of the products. B. always less than the total mass of the products. C. sometimes more and sometimes less than the total mass of the products. D. always equal to the total mass of the products. Standardized Test Preparation Chapter 8

3 1. According to the law of conservation of mass, the total mass of the reacting substances is A. always more than the total mass of the products. B. always less than the total mass of the products. C. sometimes more and sometimes less than the total mass of the products. D. always equal to the total mass of the products. Standardized Test Preparation Chapter 8 Multiple Choice

4 2. To balance a chemical equation, you may adjust the A. coefficients. B. subscripts. C. formulas of the products. D. either the coefficients or the subscripts. Standardized Test Preparation Chapter 8 Multiple Choice

5 2. To balance a chemical equation, you may adjust the A. coefficients. B. subscripts. C. formulas of the products. D. either the coefficients or the subscripts. Standardized Test Preparation Chapter 8 Multiple Choice

6 3.Which is the correct chemical equation for the following formula equation: (NH 4 ) 2 S NH 3 + H 2 S? A. 2(NH 4 ) 2 S 2NH 3 + H 2 S 2 B. 2(NH 4 ) 2 S 2NH 3 + H 2 S C. (NH 4 ) 2 S 2NH 3 + H 2 S D. None of the above Standardized Test Preparation Chapter 8 Multiple Choice

7 3.Which is the correct chemical equation for the following formula equation: (NH 4 ) 2 S NH 3 + H 2 S? A. 2(NH 4 ) 2 S 2NH 3 + H 2 S 2 B. 2(NH 4 ) 2 S 2NH 3 + H 2 S C. (NH 4 ) 2 S 2NH 3 + H 2 S D. None of the above Standardized Test Preparation Chapter 8 Multiple Choice

8 4. Select the missing reactant(s) for the double- displacement reaction that produces PF 5 and AsCl 3. A. PCl 5 and AsF 3 B. PCl 3 and AsF 5 C. PCl 3 and AsF 3 D. None of the above Standardized Test Preparation Chapter 8 Multiple Choice

9 4. Select the missing reactant(s) for the double- displacement reaction that produces PF 5 and AsCl 3. A. PCl 5 and AsF 3 B. PCl 3 and AsF 5 C. PCl 3 and AsF 3 D. None of the above Standardized Test Preparation Chapter 8 Multiple Choice

10 5. Select the missing reactant for the following combustion reaction: 2______ + 15O 2 14CO 2 + 6H 2 O. A. C 14 H 12 B. C 14 H 12 O 4 C. C 7 H 6 D. C 7 H 6 O 2 Standardized Test Preparation Chapter 8 Multiple Choice

11 5. Select the missing reactant for the following combustion reaction: 2______ + 15O 2 14CO 2 + 6H 2 O. A. C 14 H 12 B. C 14 H 12 O 4 C. C 7 H 6 D. C 7 H 6 O 2 Standardized Test Preparation Chapter 8 Multiple Choice

12 6. A mixture consists of Ag, Pb, and Fe metals. Which of these metals will react with ZnCl 2 ? A. Ag(s) B. Pb(s) C. Fe(s) D. None of these metals Standardized Test Preparation Chapter 8 Multiple Choice

13 6. A mixture consists of Ag, Pb, and Fe metals. Which of these metals will react with ZnCl 2 ? A. Ag(s) B. Pb(s) C. Fe(s) D. None of these metals Standardized Test Preparation Chapter 8 Multiple Choice

14 7. Which of the following statements is true about the reaction 2F 2 + 2H 2 O 4HF + O 2 ? A. Two grams of O 2 are produced when 2 g F 2 reacts with 2 g H 2 O. B. Two moles of HF are produced when 1 mol F 2 reacts with 1 mol H 2 O. C. For every 2 mol O 2 produced, 6 mol HF are produced. D. For every 1 mol H 2 O that reacts, 2 mol O 2 are produced. Standardized Test Preparation Chapter 8 Multiple Choice

15 7. Which of the following statements is true about the reaction 2F 2 + 2H 2 O 4HF + O 2 ? A.Two grams of O 2 are produced when 2 g F 2 reacts with 2 g H 2 O. B. Two moles of HF are produced when 1 mol F 2 reacts with 1 mol H 2 O. C. For every 2 mol O 2 produced, 6 mol HF are produced. D. For every 1 mol H 2 O that reacts, 2 mol O 2 are produced. Standardized Test Preparation Chapter 8 Multiple Choice

16 Short Answer 8. Determine the products and write a balanced equation for the reaction of solid magnesium and water. Standardized Test Preparation Chapter 8

17 8. Determine the products and write a balanced equation for the reaction of solid magnesium and water. Answer: Mg(s) + 2H 2 O(l) Mg(OH) 2 (aq) + H 2 (g) Standardized Test Preparation Chapter 8 Short Answer

18 9. A precipitation of iron(III) hydroxide is produced by reacting an aqueous solution of iron(III) chloride with an aqueous solution of sodium hydroxide. Write a balanced chemical equation. Standardized Test Preparation Chapter 8 Short Answer

19 9. A precipitation of iron(III) hydroxide is produced by reacting an aqueous solution of iron(III) chloride with an aqueous solution of sodium hydroxide. Write a balanced chemical equation. Answer: FeCl 3 (aq) + 3NaOH(aq) Fe(OH) 3 (s) + 3NaCl(s) Standardized Test Preparation Chapter 8 Short Answer

20 Extended Response 10. List the hypothetical metals A, E, M, and R in increasing order of reactivity by using the reaction data in the table below. The reaction of interest is of the form C + ZX CX + Z. Explain your reasoning. AXEXMXRX A _____ no reactionreactionno reaction Ereaction _____ reaction Mno reaction _____ no reaction Rreactionno reactionreaction _____ Standardized Test Preparation Chapter 8

21 Answer: The metals in increasing order of reactivity are M, A, R, and E. M is the least reactive because it shows no reaction in a single-displacement reaction with any of the other metals. A is the next least reactive because it will react in a single-displacement reaction with only M. E is the most reactive metal of the series because E will react in a single-displacement reaction with the other three metals. Standardized Test Preparation Chapter 8 Extended Response 10. List the hypothetical metals A, E, M, and R in increasing order of reactivity by using the reaction data in the table below. The reaction of interest is of the form C + ZX CX + Z. Explain your reasoning.

22 11. Calcium hypochlorite, Ca(OCl) 2, is a bleaching agent produced from sodium hydroxide, calcium hydroxide, and chlorine. Sodium chloride and water are also produced in the reaction. Write the balanced chemical equation. If 2 mol NaOH react, how many moles of calcium hypochlorite can be produced? Standardized Test Preparation Chapter 8 Extended Response

23 11. Calcium hypochlorite, Ca(OCl) 2, is a bleaching agent produced from sodium hydroxide, calcium hydroxide, and chlorine. Sodium chloride and water are also produced in the reaction. Write the balanced chemical equation. If 2 mol NaOH react, how many moles of calcium hypochlorite can be produced? Answer: The balanced chemical equation is 2NaOH + Ca(OH) 2 + 2Cl 2 Ca(OCl) 2 + 2NaCl + 2H 2 O. If 2 mol NaOH react, then 1 mol Ca(OCl) 2 can be produced. Standardized Test Preparation Chapter 8 Extended Response


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