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FOR 4/6/01, FRIDAY, CHAPTER 5 & CHAPTER 6
DUE: M&M PROBLEM. STUDY: p.97: #24,25,26,27,28,29,30,32,36 P.118 #2,3,5,6,7,8,9
Chapter 6: Especially think about: aliquot, equivalence point, end point, indicator, mole, molecular weight, Molarity, primary standard, standardization, titrant, titration, standard solution. Be able to calculate each of the following items: for a compound - molecular weight; for a solution - Molarity, normality, weight percent, ppm, ppb. The questions on page 118 are good thought questions. You should work through 2, 3, 5, 6. Good students will write our all four answers. All of you have done titrations, but you probably need to review the terms. Does it seem possible that most chemical reactions fall into four types? You should review each of the four types - acid-base, precipitation, redox, complexometric. You should learn the four requirements for any titration. What are the requirements for a primary standard? I expect that molarity is your friend. Review the examples. Weight percent is used in one concentration range and parts per million is for smaller concentrations. I am now seeing results expressed in parts per billion. How would you define ppb? Note the safety label on page 108. Note page 108, does the table remind you of the lab. Note 6C - 5. Study Ex. 6-11. In 6-12 and 6-13, how does the chemical equation enter into the calculation of the molarity. Ex. 6-16 is an example of a back titration. What do you think of a weight titration? Note: terms.
FOR 4/9, MONDAY- CHAPTER 6 and 7 DUE: Ch. 5:p.98-9: 5-24,5-28,5-30,5-33,5-35,5-38. Bonus 5-39; STUDY: 5-1, 5-2, 5-7, 5-16. Finish Chapter 6 and begin to read Chapter 7. Chapter 7: Review the terminology on acids and bases, IS 7A-2 a review? Autoprotolysis is important. There are solvents other than water. Define amphiprotic. I hope the section 6B on equilibrium is a review.
FOR 4/11, WEDNESDAY, Chapter 7 and PROBLEMS TO DATE, DUE: CH 6: 19,21, 26, 27, 28, 28, 29, 32. STUDY: p.146: 7,8,9,11, p.147: 16,17,18 Review what you need to polish. Study: PAGE 119: 12,13,15,19,20,22,23, 27, 29 STUDY: PAGE 119-121: ALL ARE GOOD ONES, and p.146: 1,2,4,5,6
FOR 4/13 Ch.10 & 11 ACID-BASE (NEUTRALIZATION) TITRATIONS Quiz
Due: To be assigned STUDY: p. 221: 1, 2, 3, 4, 5, 6, 8, 9, 10, 11
Note the section on indicators and buffers. What is a buffer? What is an indicator? Do you note any of your friends on page 191 in the table? There are several types of acid-base titration curves. What is a buffer? Look at pages 220 and 221. Equation 10-11 is one that biochemists feel is very important. Can you derive it from the Keq expression? Compare 10-10 and 10-11. What do buffers do? See p. 204 ff. Does kA change the shape of a titration curve? Note section 10-H. Also note titration curves for weak bases. What is a titration curve? What are the types of titration curves? What is the effect of concentration of titrant on the shape of the curve? What is the effect of the Ka on the shape of the curve?
FOR 4/16 CH.10, 11, 12 ACID-BASE TITRATIONS DUE & Study problems: to be assigned.
The plot thickens when the acid has more than one hydrogen ions. Read chapter 11. Chapter 12 has applications. Some of these should be familiar to you. Finish this topic
4/18 CHAPTER 13 AND 14 DUE: TO BE assigned. QUIZ
Note the three types of endpoint detection-Volhard, Adsorption indicator and Mohr. Fig 9-5 shows how mixtures can be determined. Table 9-3 gives some of the possible ions that are determined by this method of titration.
4/20 CHAPTER 13 AND CHAPTER 14 DUE: TO BE assigned.
What is EDTA? Does the pH of the solution have any changes in what can be titrated with EDTA? See p.298. Is there a universal indicator for EDTA? Especially note section 13B-6. Note the four types of EDTA Titrations. Read about complexometric titrations in a second book. What is hard water? What is the scope of EDTA titrations? What is a masking agent? What is an interfering element?
4/23 REVIEW OF MATERIAL TO DATE AND QUIZ Review what you need to for 4/26
4/25 FIRST HOUR TEST-ALL MATERIAL TO DATE, ALSO LAB 1
4/27 LITERATURE OF ANALYTICAL CHEMISTRY DUE: NONE STUDY: READ APPENDIX 1
4/30 REAL LIFE SAMPLES AND SAMPLING DUE Library Assignment ats 2/26/01
MORE TO FOLLOW!