Quiz 2 Test Form B Nov. 8, 2013 INSTRUCTIONS: 1) Write your name on the Parscore form 2) Bubble in FORM B 3) Bubble in your PERM number (7 digits only, no extra numbers) Completely fill bubbles / answers There are nine questions. Points are indicated. It is to your benefit to SHOW ALL YOUR WORK ON THE QUIZ and CIRCLE YOUR ANSWERS. Turn in your Parscore form only (show your quiz so we can check your form). Keep the quiz so you can check your work and your answers later. The answers to the quiz will be posted on our course web page. NOTE: No hats with caps allowed. No sharing of calculators. No NOTES allowed. Cell phones and all other electronic devices must be turned off and put away. EQUATIONS: PV = nRT (KE)av = 12mu2 = 32RT uav = u = 8RTM ANSWERS are given at the end of the quiz 1. (1 pt) True or False? Given a cylinder of fixed volume filled with 1 mol of argon gas. If the temperature of the cylinder is changed from 25°C to 50°C, the pressure inside the cylinder will double. A) true B) false Questions 2 – 3: Consider the reaction between 50.0 mL of 0.200 M NaOH and 100.0 mL of 0.100 M HCl. Indicate if the following statements are true or false. 2. (1 pt) After the reaction, the concentration of Cl‾ is still 0.100 M because Cl‾ is a spectator ion. A) true B) false 3. (1 pt) After the reaction, the concentration of Na+ is greater than the concentration of OH‾. A) true B) false 4. (3 pts) Consider three identical 1.0 L flasks filled with different gases. Flask A: NO at 100 torr and 150 oC Flask B: N2 at 250 torr and 100 oC Flask C: CO at 760 torr and 150 oC In which flask will the molecules have the greatest average speed? A) Flask A B) Flask B C) Flask C D) The average speed is the same for all three gases E) The molecules in Flask A and Flask C have the same average speedQuiz 2 Test Form B Nov. 8, 2013 5. (4 pts) A solution is made by mixing 40.0 mL of 5.00 M NaCl with 50.0 mL of 6.00 M CaCl2. When 35.0 mL of this solution is added to 75.0 mL of water, what is the resulting chloride ion concentration? A) 2.83 M B) 4.15 M C) 5.56 M D) 1.77 M E) 2.59 M 6. (4 pts) When the following reaction is balanced in basic solution using the smallest whole-number coefficients, what is the coefficient in front of OH– ? . Cl2 Cl– + ClO3– A) 4 B) 2 C) 6 D) 3 E) 5Quiz 2 Test Form B Nov. 8, 2013 7. (2 pts) Identify the reducing agent in the following equation. Pb (s) + PbO2 (s) + 2 H2SO4 (aq) 2 PbSO4 (s) + 2 H2O (l) A) Pb B) PbO2 C) H2SO4 D) PbSO4 E) H2O 8. (4 pts) Magnesium metal reacts with hydrochloric acid to form aqueous magnesium chloride and hydrogen gas. When 2.65 g of magnesium is added to 50.0 mL of 3.00 M hydrochloric acid, what volume of hydrogen is produced, assuming the reaction goes to completion? The final temperature is 90.0 oC and the pressure is 0.85 atm. A) 0.652 L B) 5.26 L C) 10.5 L D) 3.82 L E) 2.63 L ANSWERS: 1. B 2. B 3. A 4. C 5.A 6. C 7. A 8. E R = 0.08206 L atm mol-1 K-1 1 atm = 760 torr PV = nRT P1 = X1Ptot PERIODIC TABLE 1A 8A 1A 2A 1 H 1.008 2 He 4.003 3A 4A 5A 6A 7A Period 2 3 Li 6.941 4 Be 9.012 5 B 10.816 C 12.01 7 N 14.01 8 O 16.00 9 F 19.00 10 Ne 20.18 3 11 Na 22.99 12 Mg 24.30 3 4 5 6 7 8 9 10 11 12 13 Al 26.9814 Si 28.09 15 P 30.97 16 S 32.07 17 Cl 35.45 18 Ar 39.95 4 19 K 39.10 20 Ca 40.08 21 Sc 44.96 22 Ti 47.88 23 V 50.94 24 Cr 52.00 25 Mn 54.94 26 Fe 55.85 27 Co 58.93 28 Ni 58.69 29 Cu 63.5530 Zn 65.39 31 Ga 69.7232 Ge 72.61 33 As 74.92 34 Se 78.96 35 Br 79.90 36 Kr
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