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Concept explainers
(a)
Interpretation: The structure of glycine at the
Concept introduction: In the solid state and also in solution,
(b)
Interpretation: The structure of glycine at the
Concept introduction: In the solid state and also in solution,
(c)
Interpretation: The structure of glycine at the
Concept introduction: In the solid state and also in solution,
(d)
Interpretation: The structure of glycine at the
Concept introduction: In the solid state and also in solution,
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Chapter 20 Solutions
EBK GENERAL, ORGANIC, AND BIOLOGICAL CH
- At 39.9ºC, a solution of ethanol (XetOH = 0.9006, P * etOH = 130.4 Torr) and isooctane (P * iso = 43.9 Torr) forms a vapor phase with YetOH = 0.6667. The total pressure is 185.9 a. Calculate the activity and the activity coefficient of each component.b. Calculate the total pressure the solution would have if it were ideal.c. Comparing the ideal pressure to the actual pressure, what does this indicate about the molecular interactions?arrow_forwardDescribe how you would prepare a 500 ml of 0.35M Glycine pH2.2 from a 5M Glycine solution of pH 7. Show your calculations.arrow_forwardBased on the Henderson-Hasselbalch equation (shown below), calculate the pH when half of a solution of acetic acid is dissociated to acetate (the pKa of acetic acid is 4.76). A. 1.00 B. 3.76 C. 4.76 D. 5.76arrow_forward
- Consider a buffer solution that contains 0.55 M NH2CH2CO2H and 0.35 M NH2CH2CO2Na. pKa(NH2CH2CO2H)=9.88. a. Calculate its pH. b. Calculate the change in pH if 0.155 g of solid NaOH is added to 250 mL of this solution. c. If the acceptable buffer range of the solution is ±0.10 pH units, calculate how many moles of H3O+ can be neutralized by 250 mL of the initial buffer.arrow_forwardA solution with a density of 0.876 g>mL contains 5.0 g of toluene 1C7H82 and 225 g of benzene. Calculate the molarity of the solution.arrow_forwardDraw the Fischer projection formula for each of the following molecules. 1-36 а. b. ОН НО CH3 CI H i CH3 CH3 d. CH3 с. C. Cl ОН H CI НО Harrow_forward
- According to Aristotle’s density equation, if 3.161 grams of the sugar sucrose (C12H22O11) occupies a volume of 2.0 cubic centimeters, then sucrose must have a density of: 0.6327 grams/cm3 B. 1.5805 grams/cm3 2.322 grams/cm3 10.322 grams/cm3 25.288 grams/cm3arrow_forwardThe pH of normal human blood is in the range of 7.35 to7.45. Compute the range of the concentration of H3O+and the range of the OH- concentration in normal blood.arrow_forwardThe pKa values of a compound with two ionizable groups are pK1 = 4.10 and pK2 between 7 and 10. A biochemist has 10 mL of a 1.0 M solution of this compound at a pH of 8.00. She adds 10.0 mL of 1.00 M HCl, which changes the pH to 3.20. What is pK2?arrow_forward
- Consider these compounds: A. PbBr, B. MnS C. Ag,CO3 D. AIPO, Complete the following statements by entering the letter(s) corresponding to the correct compound(s). (If more than one compound fits the description, include all the relevant compounds by writing your answer as a string of characters without punctuation, e.g, ABC.) Without doing any calculations it is possible to determine that magnesium fluoride is more soluble than and magnesium fluoride is less soluble than| It is not possible to determine whether magnesium fluoride is more or less soluble than by simply comparing Kgp values.arrow_forwardThe structure of ephedrine isgiven, The pKa for ephedrine is 9.6. Answer the following questions about aqueous solutions of ephedrine. a. Draw the structure of the principal chemical form of ephedrine that results when it isdissolved in water.b. Draw the structure of the principal chemical form of ephedrine that results when it is dissolved in a buffer at a physiologically relevant pH of 7.4.c. Calculate the pH that results when 0.3 mole of ephedrine is dissolve in 2.0 L of 0.05 M perchloric acid (HClO4).arrow_forwardThe concentration of alcohol 1CH3CH2OH2 in blood, calledthe “blood alcohol concentration” or BAC, is given in unitsof grams of alcohol per 100 mL of blood. The legal definitionof intoxication, in many states of the United States, is that theBAC is 0.08 or higher. What is the concentration of alcohol,in terms of molarity, in blood if the BAC is 0.08?arrow_forward