Please provide both answer Question 5The amino acid serine, NH2CH(CH2OH)COOH has the following pK, values:pK1 = 2.19 pKa1 = 9.21.What is/are the major species at pH = 8.16?(Note: in this context, major species refers only to the species present in the highestconcentration.)NH2CH(CH2OH)COOHNH2CH(CH2OH)CO0*NH3CH(CH2OH)Coo*NH3CH(CH2OH)COOHQuestion 6NaOH is a strong base. What is the pH of a 0.00142 mol L1 solution of NaOH?14.27.04 x 10-122.8511.15

1) The correct option is - (c) Solution - According to the question Given - Amino acid are…

Answered: The amino acid serine, NH2CH(CH2OH)COOH…

Fundamentals Of Analytical Chemistry

9th Edition

ISBN:9781285640686

Author:Skoog

Publisher:Skoog

Chapter15: Complex Acid/base Systems

Section: Chapter Questions

Problem 15.16QAP

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16-27 Guanidine, p/Ca 13.6, is a very strong base, almost as basic as hydroxide ion. NH NH2+ II II H2N—C—NH2 + H2O H2N—C—NH2 + OH" Guanidine Guanidinium ion pKb = 13.6 Complete the Lewis structure for guanidine, showing all valence electrons. The remarkable basicity of guanidine is attributed to the fact that the positive charge on the guanidinium ion is delocalized by resonance over the three nitrogen atoms. This delocalization increases the stability of the guanidinium ion relative to the ammonium ion or substituted ammonium ions. Draw three equivalent contributing structures for the guanidinium ion and show by the use of curved arrows how these three contributors are related. Propose an explanation for the fact that protonation occurs on the C=NH nitrogen rather than on one of the —NH., nitrogens. (Hint: Consider the resonance stabilization of the structure formed by protonation on a —NH., nitrogen compared with the resonance stabilization of the structure formed by protonation on the =NH nitrogen.) Predict the N—C—N bond angles in the hybrid. Which is the stronger acid, the ammonium ion or the guanidinium ion?
Calculate [H₂Asc], [HAsc], [Asc²-], and the pH of 0.050 Mascorbic acid H₂CH₂O, H₂Asc. (K₁1 = 1.0x10-5 and K₁2 = 5x10-12).
Calculating percent dissociation of a weak acid Calculate the percent dissociation of butanoic acid (C,H,CO,H) in a 1.4 mM aqueous solution of the stuff. You may find some useful data in the ALEKS Data resource. Round your answer to 2 significant digits. x10
At what pH will the concentration of a compound with a pK, 8,4 be 100 tímes greater in ita acidic form than in its basic form? Express your answer using one decimal place. pH= 7.9 At what pH will 50% of a compound with a pK, = 7.6 be in its basic form? Express your answer using one decimal place. pH = At what pH will the concentration of a compound with a pK = 4.6 be 10 times greater in its basic form than in its acidic form? Express your answer using one decimal place. pH = Submit Danunet Anenr
Benozic acid (C6H5COOH) has a pKa of 4.20. What is the ratio of the acid to its conjugate acid at a pH of 2.20 and what is the formula of the conjugate acid?
There are two pH values in which Glutamic acid will have an a complete net charge of 2.17? what is the lowest PH1 and highest of pH2 round your amswers to the nearest 0.1 no orher information was provided
When the pH is more than two (2) pH units BELOW the pKa of an amine group (e.g. -NH2), what form is the chemical group in? Select BOTH the number of hydrogens and its charge (check two boxes) no hydrogens (0 H) one hydrogen (1 H) Otwo hydrogens (2 H) three hydrogens (3 H) positive charge (+) neutral charge (0) negative charge (-)
(a) Given that Ka for acetic acid is 1.8 x 10-5 and that forhypochlorous acid is 3.0 x 10-8, which is the stronger acid?(b) Which is the stronger base, the acetate ion or the hypochloriteion? (c) Calculate Kb values for CH3COO- and ClO-.
Use the following information to answer the next question. Ka 1 x 10-14 1.1 x 10-7 1.7 x 10-4 Acid H₂0 (1) H₂S (aq) H₂Se (aq) The predicted Ka value of H₂Te (aq) would be... Select one: A. greater than the K, for H₂O but less than the Ka for H₂S (aq) ⒸB. greater than the Ka for H₂S(aq) but less than the K, for H₂Se (aq) OC. less than the Ka for H₂O( OD. greater than the Ka for H₂Se (aq)
Acids/Bases a.) Write the acid or base dissociation equation for codeine, C18H21O3N b.) Calculate the pH of a 3.90 MM C18H21O3N solution. (pKb(pKb= 5.79).
Answer the following statement. Provide an explanation. What happens to compound X when ph=pkb ph>pkb ph
a) If the Kb of a weak base is 4.7E-9, what is the Ka of its conjugate acid? Do not include any units with your answer. Your answer should have two significant figures. For scientific notation use the same as that in the problem (i.e. 3.3E-2 is the same as 3.3 x 10-2). b) Diethylamine, (CH3CH2)2NH, has a Kb of 8.6 x 10-4. What is the pH of a 0.22 M solution of diethylammonium chloride, [(CH3CH2)2NH2]Cl? Your answer should be to two places past the decimal point.

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