Zinc is more active than cobalt and iron but less

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41. Zinc is more active than cobalt and iron but less active than aluminum. Cobalt is more active than nickel but less active than iron. Which of the following correctly lists the elements in order of increasing activity? a. Co < Ni < Fe < Zn < Al b. Ni < Fe < Co < Zn < Al c. Ni < Co < Fe < Zn < Al d. Fe < Ni < Co < Al < Zn e. Zn < Al < Co < Ni < Fe 42. Oxidation is the _____ and reduction is the _____.
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43. Oxidation and _____ mean essentially the same thing. 44. Oxidation cannot occur without _____. 45. Which of the following is an oxidation-reduction reaction? a. Cu(s) + 2AgNO 3 (aq) ¢ 2Ag(s) + Cu(NO 3 ) 2 (aq) b. HCl(aq) + NaOH(aq) ¢ H 2 O(l) + NaCl(aq) c. AgNO 3 (aq) + HCl(aq) ¢ AgCl(s) + HNO 3 (aq) d. Ba(C 2 H 3 O 2 ) 2 (aq) + Na 2 SO 4 (aq) ¢ BaSO 4 (s) + 2NaC 2 H 3 O 2 (aq) e. H 2 CO 3 (aq) + Ca(NO 3 ) 2 (aq) ¢ 2HNO 3 (aq) + CaCO 3 (s) 46. Which of the following reactions will not occur as written? 47. When gold dissolves in aqua regia, what is reduced? 48. Which one of the following is a correct expression for molarity? 49. What is the concentration (M) of sodium ions in 4.57 L of a 0.847 M Na 3 P solution? a. 0.847 b. 3.87 c. 0.185 d. 2.54 e. 0.282 50. What is the concentration (M) of NaCl in a solution made by mixing 25.0 mL of 0.100 M NaCl with 50.0 mL of 0.100 M NaCl? 51. What is the concentration (M) of CH 3 OH in a solution prepared by dissolving 11.7 g of
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CH 3 OH in sufficient water to give 230 mL of solution? 52. How many grams of H 3 PO 4 are in 175 mL of a 3.5 M solution of H 3 PO 4 ? 53. There are _____ mol of bromide ions in 0.500 L of a 0.300 M solution of AlBr 3 . a. 0.150 b. 0.0500 c. 0.450 d. 0.167 e. 0.500 54. How many moles of K + are present in 343 mL of a 1.27 M solution of K 3 PO 4 ? 55. What are the respective concentrations (M) of Fe 3+ and I - afforded by dissolving 0.200 mol FeI 3 in water and diluting to 725 mL?
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