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PSU CHEM 110 - Lecture 29 Solutions 3

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Sheets Page 1 Lecture 29 Lecture 29: Solutions 3 Read: BLB 4.1, 4.5; 13.4 HW: BLB 4:3,15,37,61,72,73; 13:39,47 Sup 4:1–3; 13:8–11 Know: • electrolytes • solutions Need help?? Get help!! TAs in CRC (211 Whitmore) and SI—hours on Chem 110 website; my office hours (Mon 12:30-2 & Tues 10:30-12 in 324 Chem Bldg [or 326 Chem]) Bonus deadline for BST #9: Solutions & dilutions, April 2 Check out the grade-u-lator @ http://courses.chem.psu.edu/chem110/spring/grade.htm Exam #3: Monday, April 6 @ 6:30 pm; Sign up for the conflict exam, if needed. Last day to sign up is Wed, April 1 Late drop deadline: Friday, April 10 @ 11:59 pm via elionSheets Page 2 Lecture 29 Example: Pure acetic acid (CH3COOH), known as glacial acetic acid, is a liquid with a density of 1.049 g/mL at 25°C. Calculated the molarity of a solution of acetic acid made by dissolving 20.00 mL of glacial acetic acid in enough water to make 250.0 mL of solution.Sheets Page 3 Lecture 29 Examples: Which of the following aqueous solutions has the greatest total concentration of ions? A. 0.2 M NH4NO3 B. 0.2 M Pb(NO3)2 C. 0.2 M Na2SO4 D. 0.2 M AlPO4 E. 0.2 M AlBr3 F. 0.2 M CH3COOH (acetic acid) Which of the following species is NOT an electrolyte in aqueous solution? A. HCl B. Rb2SO4 C. CH3CH2OH D. KOH E. NaClSheets Page 4 Lecture 29 Examples: Which one of the following solutions will have the greatest concentration of hydroxide ions? A. 0.100 M rubidium hydroxide B. 0.100 M magnesium hydroxide C. 0.100 M ammonia D. 0.100 M sodium hydroxide E. 0.100 M hydrochloric acid A solution is prepared by dissolving calcium chloride in water and diluting to 300.0 mL. If this solution contains 66 ppm chloride ions, the concentration of calcium ions is ________ ppm. A. 33 ppm B. 44 ppm C. 66 ppm D. 132 ppmSheets Page 5 Lecture 29 Before next class: Read: BLB 13.1–13.3 HW: BLB 13:7,15,21,23,33 Sup13:1–7 Know: • how solutions form • solubility & saturation • factors affecting solubility Answers: p. 2: 1.40 M p. 3: (top): E; (bottom): C p. 4: (top): B; (bottom):


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PSU CHEM 110 - Lecture 29 Solutions 3

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