answer the 2 questions please 19. Which of the following species is the strongest base?A) HO B) H2N° C) CH;CO0 D) Cl-20. Which of the following ranks the compounds in order of increasing basicity, putting theleast basic first?A) CH3NH2 < CH3OH< CH4B) CH3OH < CH;NH2 < CH4C) CH4 < CH3NH2 < CH3OHD) CH4 < CH;OH < CH3NH2

The conjugate of weak acid is strong base Option B is correct , that is amide Ion is most basic…

Answered: 19. Which of the following species is…

Introductory Chemistry For Today

8th Edition

ISBN:9781285644561

Author:Seager

Publisher:Seager

Chapter9: Acids, Bases, And Salts

Section: Chapter Questions

Problem 9.15E

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The following are equivalent ways of asking about the acidity of an H atom: • What is the most acidic H on the molecule? • Which H is associated with the published pKa value? • Which H on the molecule is easiest to remove? • Which H on the molecule takes the least energy to remove? • Which bond to an H is most polarized? • For which H atom is removal least uphill in energy? • Which bond to an H atom, when broken, results in the lowest PE conjugate base? We will often find the last of these questions is easiest to answer. To do this, find all the different Hatoms on the molecule, and draw all possible conjugate bases.Only the lowest-energy one is the “real” conjugate base. Identify this structure, and you have found the most acidic H. Use this strategy to find the most acidic H on each of the following molecules. Note: Each structure hasat least three different kinds of H’s, so draw at least three unique conjugate bases for each.
Complete the equation for the reaction between each Lewis acid-base pair. In each equation, label which starting material is the Lewis acid and which is the Lewis base; use curved arrows to show the flow of electrons in each reaction. In doing this problem, it is essential that you show valence electrons for all atoms participating in each reaction. (a) (b) (c) (d)
Several acids and their respective equilibrium constants are: Which is the strongest acid? Which is the weakest acid? Which acid has the weakest conjugate base? Which acid has the strongest conjugate base?
For the previous four questions, label each molecule that appears in the question or your answer asstrong acid, strong base, weak acid, or weak base.
A very strong base can remove a proton from methylamine:
2. Which base is stronger in each set? (a) H or CI (c) KCN or (b) NaOH or NaNHz
Rank the following ions in order of increasing basicity. a. CH,ČH2, CH,0", CH,ÑH c. CH;CO0", CH3CH,O", CICH,COO b. CH", HO", Br d. -C=C", -CH,CH,. -CH=CH
Which is the stronger base, CH3PH or CH3S? Hint: Which base has the weaker conjugate acid? CH3-S: VS IA Η | ΠΙΑ LBe 11 12 Na Mg CH3-PH IIIA IVA VA VIA VILA He 9 10 B 68 80 104 106 106 107 108 100 110 Fr Ra Ac Ung Unp Unh Uns Uno Une Unn Select one: O A. CH3PH* O B. CH3S™ 51 13 Al 14 CNO F Ne Si 15 16 S "a P 37 38 30 40 41 42 43 44 45 46 47 48 40 50 Rb Sr Y Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te VIILA 66 57 56 72 73 74 75 76 77 78 791 80 81 82 83 Cs Ba La Hf Ta W Re Os Ir Pt Au Hg Tl Pb Bi 22 23 24 25 26 27 28 29 30 31 32 -33 34 35 19 20 21 K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr 20 By By 30 E 17 CI Ar 18 61 62 63 54 I Xe 84 85 Po At Rn 86
What is the weaker base, NH3 or NaNH2?
9. Arrange the following in order of decreasing basicity (most to least basic). NH₂ NH₂ NH₂ NH₂ 6 6 6 6 Br 1 A) 1>2>4> 3 2 B) 3>4>2 > 1 O 3 CH₂ C) 3>2>4>1 4 D) 2>3>4>1
a) Arrange the following according to increasing basicity. 4p NH3, NHC22, NH(CH3)2 Least basic most basic b) Arrange the following according to increasing acidity. 4p H3CCH2CH=CH, H3CCH2C=CH H3C-C=C-CH3 Least acidic most acidic c) Arrange the following according to increasing basicity. 4p CH;O', CH;NH", CH;CH2', Least basic most basic d) Arrange the following according to their boiling points. 4p Octane, 2,2,3,3-tetramethylbutane, nonane Least BP highest BP
2. Rank the following compounds in order of increasing acidity, putting the least acidic first. COOH CI I I

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19. Which of the following species is the strongest base? А) НО В) H2N C) CH3CОO D) CI 20. Which of the following ranks the compounds in order of increasing basicity, putting the least basic first? A) B) CH3OH < CH;NH2 < CH4 C) CH4 < CH3NH2 < CH3OH D) CH4 < CH3OH < CH;NH2 CH3NH2 < CH3OH< CH4