PRIN.OF GENERAL,ORGANIC+BIOLOG.CHEM.
2nd Edition
ISBN: 9781266811852
Author: SMITH
Publisher: MCG
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Textbook Question
Chapter 16.3, Problem 16.7P
Draw the positively charged, neutral, and negatively charged forms for the amino acid phenylalanine. Which species predominates at pH 11? Which species predominates at pH 1?
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
3. Propose a synthesis for the following transformation. Do not draw an arrow-pushing
mechanism below, but make sure to draw the product of each proposed step (3 points).
CN
+ En
CN
3) Propagation of uncertainty. Every measurement has uncertainty. In this problem, we'll
evaluate the uncertainty in every step of a titration of potassium hydrogen phthalate (a
common acid used in titrations, abbreviated KHP, formula CsH5KO4) with NaOH of an
unknown concentration.
The calculation that ultimately needs to be carried out is:
concentration NaOH
1000 x mass KHP × purity KHP
molar mass KHP x volume NaOH
Measurements:
a) You use a balance to weigh 0.3992 g of KHP. The uncertainty is ±0.15 mg (0.00015
g).
b) You use a buret to slowly add NaOH to the KHP until it reaches the endpoint. It takes
18.73 mL of NaOH. The uncertainty of the burst is 0.03 mL..
c) The manufacturer states the purity of KHP is 100%±0.05%.
d) Even though we don't think much about them, molar masses have uncertainty as well.
The uncertainty comes from the distribution of isotopes, rather than random
measurement error. The uncertainty in the elements composing KHP are:
a. Carbon:
b. Hydrogen:
±0.0008…
Don't used hand raiting and don't used Ai solution
Chapter 16 Solutions
PRIN.OF GENERAL,ORGANIC+BIOLOG.CHEM.
Ch. 16.2 - In addition to the amino and carboxyl groups, what...Ch. 16.2 - How do the OH groups in Ser, Thr, and Tyr differ?Ch. 16.2 - Draw both enantiomers of each amino acid in...Ch. 16.2 - Which of the following amino acids is naturally...Ch. 16.3 - Draw the structure of the amino acid valine at...Ch. 16.3 - Identify the amino acid shown with all uncharged...Ch. 16.3 - Draw the positively charged, neutral, and...Ch. 16.4 - Identify the N-terminal and C-terminal amino acid...Ch. 16.4 - (a) Identify the N-terminal amino acid in the...Ch. 16.4 - Identify the individual amino acids in each...
Ch. 16.4 - Prob. 16.11PCh. 16.5 - Prob. 16.12PCh. 16.6 - Prob. 16.13PCh. 16.6 - Draw the structures of each pair of amino acids...Ch. 16.6 - The fibroin proteins found in silk fibers consist...Ch. 16.7 - Prob. 16.16PCh. 16.7 - Prob. 16.17PCh. 16.8 - Prob. 16.18PCh. 16.8 - Prob. 16.19PCh. 16.8 - Prob. 16.20PCh. 16.9 - Prob. 16.21PCh. 16.9 - Prob. 16.22PCh. 16.9 - The nerve gas sarin acts as a poison by covalently...Ch. 16.10 - Prob. 16.24PCh. 16 - Prob. 16.25UKCCh. 16 - Prob. 16.26UKCCh. 16 - For each amino acid: [1] draw the L enantiomer in...Ch. 16 - For each amino acid: [1] give the name; [2] give...Ch. 16 - For the given tripeptide: (a) identify the amino...Ch. 16 - For the given tripeptide: (a) identify the amino...Ch. 16 - Label the regions of secondary structure in the...Ch. 16 - Label the regions of secondary structure in the...Ch. 16 - What type of interactions occur at each of the...Ch. 16 - Using the given representations for an enzyme and...Ch. 16 - Naturally occurring amino acids are L--amino...Ch. 16 - Why do neutral amino acids exist as zwitterions...Ch. 16 - The amino acid alanine is a solid at room...Ch. 16 - Why is phenylalanine water soluble but...Ch. 16 - Draw the structure of a naturally occurring amino...Ch. 16 - Draw the structure of a naturally occurring amino...Ch. 16 - For each amino acid: [1] draw the l enantiomer in...Ch. 16 - For each amino acid: [1] draw the l enantiomer in...Ch. 16 - Draw both enantiomers of each amino acid and label...Ch. 16 - Which of the following Fischer projections...Ch. 16 - For each amino acid: [1] give the name; [2] give...Ch. 16 - For each amino acid: [1] give the name; [2] give...Ch. 16 - Draw the amino acid leucine at each pH: (a) 6; (b)...Ch. 16 - Draw the amino acid isoleucine at each pH: (a) 6;...Ch. 16 - Draw the structure of the neutral, positively...Ch. 16 - Draw the structure of the neutral, positively...Ch. 16 - For each tripeptide: [1] identify the N-terminal...Ch. 16 - For each tripeptide: [1] identify the N-terminal...Ch. 16 - For the given tripeptide: (a) identify the amino...Ch. 16 - For the given tripeptide: (a) identify the amino...Ch. 16 - Locate the peptide bond in the dipeptide shown in...Ch. 16 - Label the N-terminal and C-terminal amino acids in...Ch. 16 - Draw the structures of the amino acids formed when...Ch. 16 - Draw the structures of the amino acids formed when...Ch. 16 - What amino acids are formed by hydrolysis of the...Ch. 16 - Give the three-letter abbreviations for the amino...Ch. 16 - What is the difference between the primary and...Ch. 16 - What is the difference between the tertiary and...Ch. 16 - What type of intermolecular forces exist between...Ch. 16 - Which of the following pairs of amino acids can...Ch. 16 - List two amino acids that would probably be...Ch. 16 - List two amino acids that would probably be...Ch. 16 - Compare -keratin and hemoglobin with regards to...Ch. 16 - Compare collagen and myoglobin with regards to...Ch. 16 - When a protein is denatured, how is its primary,...Ch. 16 - Hydrogen bonding stabilizes both the secondary and...Ch. 16 - Describe the function or biological activity of...Ch. 16 - Describe the function or biological activity of...Ch. 16 - Use the given representations for an enzyme,...Ch. 16 - Use the given representations for an enzyme and...Ch. 16 - How are enzyme inhibitors used to treat high blood...Ch. 16 - How are enzyme inhibitors used to treat HIV? Give...Ch. 16 - What structural feature in -keratin makes...Ch. 16 - Why does the -keratin in hair contain many...Ch. 16 - Why must vegetarian diets be carefully balanced?Ch. 16 - Why does cooking meat make it easier to digest?Ch. 16 - Sometimes an incision is cauterized (burned) to...Ch. 16 - Prob. 16.82APCh. 16 - How is sickle cell disease related to hemoglobin...Ch. 16 - The silk produced by a silkworm is a protein with...Ch. 16 - Explain the difference in the mechanism of action...Ch. 16 - How are blood enzyme levels used to diagnose...Ch. 16 - Explain why two amino acids aspartic acid and...Ch. 16 - Prob. 16.88CP
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemistry and related others by exploring similar questions and additional content below.Similar questions
- How would you use infrared spectroscopy to distinguish between the following pairs of constitutional isomers? (a) CH3C=CCH3 || and CH3CH2C=CH (b) CH3CCH=CHCH3 and CH3CCH2CH=CH2 Problem 12-41 The mass spectrum (a) and the infrared spectrum (b) of an unknown hydrocarbon are shown. Propose as many structures as you can. (a) 100 Relative abundance (%) 80 60 60 40 200 20 (b) 100 Transmittance (%) 10 20 20 80- 60- 40- 20 40 60 80 100 120 140 m/z 500 4000 3500 3000 2500 2000 1500 Wavenumber (cm-1) 1000arrow_forwardPropagation of uncertainty. You have a stock solution certified by the manufacturer to contain 150.0±0.03 µg SO42-/mL. You would like to dilute it by a factor of 100 to obtain 1.500 µg/mL. Calculate the uncertainty in the two methods of dilution below. Use the following uncertainty values for glassware: Glassware Uncertainty (assume glassware has been calibrated and treat the values below as random error) 1.00 mL volumetric pipet 0.01 mL 10.00 mL volumetric pipet 0.02 mL 100.00 mL volumetric flask 0.08 mL Transfer 10.00 mL with a volumetric pipet and dilute it to 100 mL with a volumetric flask. Then take 10.00 mL of the resulting solution and dilute it a second time with a 100 mL flask. 2. Transfer 1.00 mL with a volumetric pipet and dilute it to 100 mL with a volumetric flask.arrow_forwardDraw all resonance structures for the following ion: CH₂ Draw all resonance structures on the canvas by choosing buttons from the Tools (for bonds), Atoms, and Advanced Template toolbars, including charges where needed. The single bond is active by default. 2D ד CONT HD EXP CON ? 1 [1] Α 12 Marvin JS by Chemaxon A DOO H C N Br I UZ OSPFarrow_forward
- What is the average mass of the 10 pennies? Report your value with correct significant figures. What is the error (uncertainty) associated with each mass measurement due to the equipment? What is the uncertainty associated with the average value? Note that the uncertainty of the balance will propagate throughout the calculation. What is the standard deviation of the 10 mass measurements? Explain the difference between the propagated uncertainty and the standard deviation. Which number would you use to describe the uncertainty in the measurement? Calculate the total mass of the pennies with associated uncertainty. Calculate the average density of a penny based on these data. Propagate the uncertainty values for both mass and volume in your calculations.arrow_forwardCan you help me and explain the answers please.arrow_forwardB 1 of 2 Additional problems in preparation to Midterm #1: 1.) How can the following compounds be prepared using Diels-Alder reaction: CH3 O CN (a) (b) CN CH3 2.) What is the missing reagent in the shown reaction? H3C + ? H3C H3C CN H3C ''CN (၁) H 3.) Write the products 1,2-addition and 1,4-addition of DBr to 1,3-cyclohexadiene. Remember, D is deuterium, a heavy isotope of hydrogen. It reacts exactly like hydrogen. 4.) In the shown reaction, which will be the kinetic product and which will be the thermodynamic product? H3C CI H3C HCI H3C + 5.) Which of the following molecules is aromatic? (a) (b) (c) H 6.) Which of the following molecules is aromatic? (a) (b) (c) 7.) Write the mechanism for the shown reaction. + Ха AICI 3 CI 8.) Suggest reagents that would convert benzene into the shown compounds. CI NO2 -8-6-6-8-a (a) (b) (c) (d) (e) (a) SO3H Brarrow_forward
- The number of 2sp^2 hybridized atoms in is: A. 8; B. 6; C.4; D.2; E.0;arrow_forwardThe highest boiling compound from among the following isA. 2-methylheptane; B. 3-methylheptane; C. 2,2-dimethylhexane;D. octane; E. 2,2,3-trimethylpentanearrow_forwardWhich of the following features are found in the most stable structure ofCH5NO that does not have a CO bond?w. a π bond, x. two NH bonds, y. one OH bond, z. 3 lone pairsA. w, x; B. x, y; C. y, z; D. x, y, z; E. all of them.arrow_forward
- Which one of the following functional groups is not present in thecompound shownA. amine; B. aldehyde, C. ether; D. amide. E. ketonearrow_forwardWhich of the following formulas correspond to at least one compound inwhich resonance is important?w. C2H5N x. C3H5Br; y. C3H4; z. C4H6.A. w, x, y; B. x, y, z; C. w, x, z; D. w, y, z; E. all of themarrow_forwardPredict the product(s) that are formed after each step for reactions 1-4. In each case, consider formation of any chiral center(s) and draw all expected stereoisomers. 1) OH 1) HBr (SN2) 2) NaOH, heat 3) BH3, THF 4) H2O2, NaOH 2) OH 1) SOCI 2, py 2) NaOEt 3) Br2, H₂O 3) OH 1) H2SO4 conc. 2) HBr, ROOR 3) KOtBu 4) OH 1) TsCl, py 2) NaOEt 3) 03 4) DMSarrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Introductory Chemistry: A FoundationChemistryISBN:9781337399425Author:Steven S. Zumdahl, Donald J. DeCostePublisher:Cengage Learning
Chemistry for Today: General, Organic, and Bioche...ChemistryISBN:9781305960060Author:Spencer L. Seager, Michael R. Slabaugh, Maren S. HansenPublisher:Cengage Learning
Introduction to General, Organic and BiochemistryChemistryISBN:9781285869759Author:Frederick A. Bettelheim, William H. Brown, Mary K. Campbell, Shawn O. Farrell, Omar TorresPublisher:Cengage Learning
Organic ChemistryChemistryISBN:9781305580350Author:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. FootePublisher:Cengage Learning
Chemistry: The Molecular ScienceChemistryISBN:9781285199047Author:John W. Moore, Conrad L. StanitskiPublisher:Cengage Learning
Introductory Chemistry: A Foundation
Chemistry
ISBN:9781337399425
Author:Steven S. Zumdahl, Donald J. DeCoste
Publisher:Cengage Learning
Chemistry for Today: General, Organic, and Bioche...
Chemistry
ISBN:9781305960060
Author:Spencer L. Seager, Michael R. Slabaugh, Maren S. Hansen
Publisher:Cengage Learning
Introduction to General, Organic and Biochemistry
Chemistry
ISBN:9781285869759
Author:Frederick A. Bettelheim, William H. Brown, Mary K. Campbell, Shawn O. Farrell, Omar Torres
Publisher:Cengage Learning
Organic Chemistry
Chemistry
ISBN:9781305580350
Author:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote
Publisher:Cengage Learning
Chemistry: The Molecular Science
Chemistry
ISBN:9781285199047
Author:John W. Moore, Conrad L. Stanitski
Publisher:Cengage Learning
Biomolecules - Protein - Amino acids; Author: Tutorials Point (India) Ltd.;https://www.youtube.com/watch?v=ySNVPDHJ0ek;License: Standard YouTube License, CC-BY