Unit Five Self-Assessment Questions.docx

A 10 mol b 20 mol c 30 mol d 60 mol section six 1 the

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a. 1.0 mol b. 2.0 mol c. 3.0 mol d. 6.0 mol Section Six 1) The hydrogen ion concentration, [H + ], of a 0.0010 M HNO 3 solution is a. 1.0 x 10 -4 M b. 1.0 x 10 -3 c. 1.0 x 10 -2 M d. 10 M 2) What is the pH of a solution that has a hydrogen ion concentration of 1.0 x 10 -11 M? a. 1.0 b. 3 c. 10 d. 11 3) What is the pH of a solution that has a hydroxide ion concentration of 1.0 x 10 -5 M? a. 1.0 b. 5 c. 9 d. 14 4) Swimming pool water with a pH of 8 has a hydrogen ion concentration of a. 8.0 M b. 8.0 x 10 -8 M c. 1.0 x 10 -8 M d. 1.0 x 10 8 M 5) The pH of pure water is a. 0 b. 1 c. 7 d. 10 e. 14 6) Which of the following is a reasonable pH for 0.015 M HCl? a. 0.015 b. 1.82 c. 8.24 d. 12.18 7) Which of the following is a reasonable pH for 0.015 M NaOH? a. 0.015 b. 1.82 c. 8.24 d. 12.18 8) Physiological pH (7.4) is the average pH of blood. Which of the following is a reasonable hydrogen ion concentration of a solution at physiological pH? a. -7.4 M b. 0.6 M c. 6 x 10 -7 M d. 1 x 10 -8 M e. 4 x 10 -8 M Section Seven 1) Which of the following pairs is a conjugate acid-base pair? a. CH 3 COOH and OH - b. HCN and CN - c. HCN and OH - d. HCl and OH - 2) Which of the following is not a conjugate acid-base pair? a. CH 3 COO - and CH 3 COOH b. F - and HF c. H 2 O and H 3 O + d. NH 3 and H 3 O + 3) A buffer solution is made from formic acid (HCOOH) and sodium formulate (HCOONa). Added acid will react with a. HCOO - b. HCOOH c. Na + d. OH - 4) Which of the following pairs could form a buffer? a. C 6 H 5 COOH and C 6 H 5 COONa b. HCl and NaCl
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Unit Five Test on March 31, 2017 c. HCl and NaOH d. NH 3 and H 3 BO 3 Section Eight 1) Which of the following is a common ingredient in antacids? a. CaCO 3 b. Ca(OH) 2 c. HCl d. KOH 2) When a person with excess stomach acid takes an antacid, the pH of the person’s stomach changes a. From a low value to a value nearer 7 b. From 7 to a much higher value c. From a low value to an even lower value d. From a high value to a lower value 3) The leading chemical product of the U.S. industry is a. Ammonia b. Lime c. Plastics d. Sulfuric acid 4) The acid used in automobile batteries is a. Citric acid b. Hydrochloric acid c. Nitric acid d. Sulfuric acid 5) The base often used in soap making is a. Ca(OH) 2 b. KOH c. NaOH d. NH 3 Chapter Eight Section One 1) Which of the following is not one of the ways we can view oxidation? a. Electrons gained b. Electrons lost c. Hydrogen atoms lost d. Oxygen atoms gained 2) Which of the following partial equations represents an oxidation of nitrogen? a. NH 3 NH 4 + b. N 2 O 4 NI 3 c. NO 3 - NO d. NO 2 N 2 O 5 3) When CrO 4 - reacts to form Cr 3 + , the chromium in CrO 4 - is a. Reduced; it loses electrons b. Reduced; it loses oxygen c. Oxidized; its oxidation number increases d. Oxidized; it gains positive charge
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Unit Five Test on March 31, 2017 4) Which of the following equations best represents a reduction of molybdenum?
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