Experiment 23 Advance Study Assignment: Determination of the Equilibrium Constant for a Chemical Reaction A student mixes 5.00 mL 2.00 × 10-"M FeNO), in l M HNO, with 3.00 mL 2.00 x 10-1 M KSCN and 2.00 mL of water. She finds that in the equilibrium mixture the concentration of FeSCN2+ is 7.0 × 10 Find K. for the reaction Fee (aq) + SCN-(aq)·n FSC02+ (aq). 1. 5 M. Step 1 Find the number of moles Fe and SCN" initially present. (Use Eq. 3.) IL 1moles Femoles SCN Step 2 How many moles of FeSCN are in the mixture at equilibrium? What is the volume of the equi- librium mixture? (Use Eq. 3.1 IL How many moles of Fe and SCN" are used up in making the FeSCN+ Step 3 How many moles of Fe" and SCN remain in the solution at equilibrium? (Use Eq. 4 and the results of Steps I and 2.) Step 4 What are the concentrations of Fe", SCN , and FeSCN at equilibrium? (Use Eq. 3 and the results of Step 2 and Step 3.) OIL 0.01L 001L Step 5 What is the value of K, for the reaction? (Use Eq. 2 and the results of Step 4) x 10 5 (9.3 x 0.9(53 x K,-142 142.6 ) (continued on following page) 94 Experiment 23 Detemination 2. Opsional Assume that the reaction studied in Problem 1 isFe (aq)+2 SCN (aq) of the Equilibrium Constant for a Chemical Reaction e(SCN), "(aq) Find K, for this reaction, given the data in Problem I. Formulate the expression for K, for the alternate reaction just cited. b Find K, as you did in Problem I: take due account of the fact that two moles SCN are used up per mole Fe(SCN) formed as you carry out the following calculations: Step 1 Results are as in Problem 1 Step 2 How many moles of Fe(SCN) are in the mixture at equilibrium? (This will be the same as in Problem 1.) moles Fe(SCN)2 How many moles of Fel" and SCN are used up in making the FerSCN),"7 moles Fe"; moles SCN Step 3 How many moles of Fe3 and SCN remain in solution at equilibrium? Use the results of Steps 1 and 2, noting that moles SCN at equilibrium original moles SCN -(2 X moles Fe(SCN)2) moles Fe";moles SCN Step 4 What are the concentrations of Fe, SCN. and Fe(SCN)2 at equilibrium? (Use Eq. 3 and the results of Step 3.) M: [Fe(SCN)2+1- M Step 5 Calculate K, based on the assumption that the alternate reaction occurs.(Use the answer to Part 2a.)

What is the IUPAC name for the following compound?

[10] 1. Let V be a vector space with dimV = 5. Fix two linearly independent vectors u, EV and set B = {u, v}. Define W :=span B Determine which of the following statements are true/false, Circle the answer that best applies (a) u and v are parallel. True False (b) W is a subspace of V. True False (c) W is a subspace of R5 True False (d) u= (1 1, ..., 15) for some I1, ...,15 € R. True False (e) The set B = (u, v) is an ordered basis for R?. True False (f) The set B = (u, v) is an ordered basis for W. True False (g) W is a 2-dimension al subspace of V. True False (h) W is a subspace of R2 True False (i) For w EW we have [w]B € R2. True False G) (u + U] B = I True False

and 2 Fill in the blanks: All tissues consist of two main components: , which consists of a gelatinous substance called numerous different and 3 An epithelial tissue that has one layer of rectangular cells would be classified as a stratified squamous epithelium. b. simple cuboidal epithelium. c stratified columnar epithelium d simple columnar epithelium 4 How do pseudostratified ciliated columnar epithelium and transitional epithelium differ from other types of epithelia? 5 True False: Mark the following statements concerning connective tissue proper and cartilage as true () or false 0). If the statement is false, correct it to make it a true statement Adipocytes contain a large lipid droplet in their cytoplasm. The primary element in dense regular collagenous connective tissue is ground substance. Bundles of collagen fibers are arranged parallel to one another in dense inregular colagenous connective tissue. Loose connective tissue contains all three protein fiber types Fibrocartilage has a smooth, glassy appearance due to a large amount of ground substance and few visible protein fibers 6 Which of the following best characterizes the extracellular matrix (ECM of bone tissue? a Bonetissue ECM consists of only calcium hydroxyapatite crystals b. Bone tissue ECM Consists of calcium hydroxyapatite crystals and collagen fibers c Bone tissue ECM consists of only colagen fibers. d. Bone tissue ECM consists of collagen, elastic, and reticular fibers. 7 Circle all that apply. Which of the following characteristics apply to skeletal muscle tissue a Striated b. Nonstrated C Multinucleate d Uninucleate e Contains intercalated discs. Voluntary 9 Involuntary h. Autorhythmic 128 - Exploring Anatomy & Physiology in the Laboratory

3 Rates of Chemical Reactions I: A Clock Reaction A. Preliminary Experiments 1. What are the colors of the solutions containing the following ions? K 2. The color of the starch-I, complex is blue-black colorless or color less 3 B. Kinetics Experiment Solution 1. Initial (S. OS 1-0.050 M; initial [l =0.050 M. Time experiment started Time (s) benveen Total moles of Aliquor no appearances of color Cumulative times (8) $0, consumed 1 188 2.0x to 2 190 338 4.0x16 200 578 6.0x104 4 215 793 80x100+ 235 1023 10.10- 255 12.83 12x10 7 284. 1557 14*10-4 Solution 2. Initial _02-1=0.10 M. Inicial [r]=0.050 m. Time experiment started 2 Time (8) between Total moles of Aliquor no. appearances of color Cumulative rimtes is) So, consumed 1 9 91 2010- 2 95 186 4,0 10+ 97 283 60X10- 382 8.0x10 482 10. 10- 100 582 12x 10- 102 684 Solution 3. Initial (5.0, 1-0.050 Bf, initial TO $ 0,2-consumed Cumulative times (8) 24% 2.0x10-4 4.0x10 6.0x10- 8.0x10-4 10.x 10- 12x10+ 14x104 523 680 True (s) beheer Aliquor no appearances of color 1 2 126 3 384 136 143 153 160 840 170 1010 Solution 4. Initiat S 0,2-)-0,10 M; initial [1] =0,025 M. Time experiment started Total moles of Time (s) between Aliquot no. appearances of color Cumulative tintes (5) 1 192 192 2 198 390 3 203 593 6.0x10 209 802 8,0x10-4 5 209 jon 6 218 1229 7 221 1450 14*10-4 5,0,?- consumed 2.0x10-4 4.0x10- + 10.x10- 12x10+