3. Which one of the following answers represents the order of increasing bacisity for compounds the box? (1) CH,CH,ONa (2) (CH),NNa (3) CH,CO,Na O 2 weakest base) <1« 3 (strongest base) O 1 weakest base) «3+2 (strongest base) O 3 (weakest basel < 21 (strongest base) O 3 weakest basel < 1< 2 strongest base) Question 4 4. Which one of the following compounds has pka with the highest numeric value? HCI CH3NH2 CH3OH CH3Br O CHBr HCI O CHNH2 O CHJOH

3. Which one of the following answers represents the order of increasing bacisity for compounds the box? (1) CH,CH,ONa (2) (CH),NNa (3) CH,CO,Na O 2 weakest base) <1« 3 (strongest base) O 1 weakest base) «3+2 (strongest base) O 3 (weakest basel < 21 (strongest base) O 3 weakest basel < 1< 2 strongest base) Question 4 4. Which one of the following compounds has pka with the highest numeric value? HCI CH3NH2 CH3OH CH3Br O CHBr HCI O CHNH2 O CHJOH

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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(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-.
Consider the reaction of acetic acid in water, where K, = 1.8x10-5. CH3CO,H(aq) + H,0(1) = CH3CO2 (aq) + H30*(aq) (a) Which two bases are competing for the proton? (Select all that apply.) O HCH,CO, O H20 O CH;CO,- O H30+ (b) Which is the stronger base? O HCH,CO2 O H20 O CH;CO, O H30* (c) In light of your answer to part (b), why do we classify the acetate ion (CH,CO,) as a weak base? The acetate ion is a ---Select--- v base than water and produces ---Select--- v solutions in water. When the acetate ion is put into solution as the only major --Select--- v species, the competition is between the acetate ion and the hydroxide ion for the proton. The resulting equilibrium lies far to the left producing a K, value of -Select-- v one. ---Select--- v is the strongest base possible in water. Species that are classified as weak bases are stronger bases than water but are weaker bases than Select--- Use an appropriate reaction to justify your answer. (Include states-of-matter at 25°C and 1 atm…
The coefficients on balancing the following reaction will be. Pb(OH)2 + HCI H20 + PbCl2 а) 1,2,2,1 b) 2,1,1,2 c) 1,2,1,2 d) 2,1,2,1
4, . Consider the following equilibrium: base + -H H-Base Which of the following base(s) would favour the product in this reaction? Он CH;O NH3 NH2 CH3CO2 (1) (II) (III) (IV) (V) (a) | (b) IV (c) I, IV and V (d) I and II (e) IIl and IV
In the following reaction in aqueous solution, the acid reactant is and its conjugate base is CH;COOH(aq) + H2O * CH3CO0 (aq) + H30 (aq) A CH3COOH; CH3C00 B CH3COOH; NH4 NH3; CH3CO0 D) NH3; NH4" E CH3COOH; H30*
Consider the following reaction: CH, ÇH, + :çi-A-Ci: H,C- A-: H,C- 50 CH3 Based on the reaction above, the reactant which acts as a Lewis base is CAICL CAICIs o(CH);CCI O(CH),C* The product which is a Lewis acid is OAICI O(CH,),cCI CAICI o(CH)C" The following salts can replace AICla in the reaction, except OBeCl OMgCl OFeCl ocrCls
. Give an example of a Lewis acid-base pair and a frustrated Lewis acid-base pair. What is the difference between these two systems? What is the mechanism for the reaction with H2?
Q2-3:(a) Given that Kb for ammonia is 1.8 X 10 -5 and that for methylamine is 4.4 X 10 -4, which is the stronger base? (b) which is the stronger acid ,the ammonium ion or the methylammonium ion ? (c) calculate the Ka for NH,* and CH;NH;* + Q2-4: A particular sample of vinegar has a pH of 2.90, assuming that the vinegar contains only acetic acid (Ka acetic acid in vinegar . 1.8 X 10 -5), calculate the concentration of Q2-5: Calculate the molar concentration of OH-ions in an 0.85M solution of hypobromite ion , BrO- (Kp 4.0X10-6) .what the pH value of this solution?
Does the equilibrium lie to the left or to the right in the following reaction: H3CO: + H-Br: 2 H;CO-H + H,CO-H + Br:
5. Draw the products of the following reactions in the boxes below. If no reaction write NR. (a) 2 CH,OH HCI (catalyst) Crog. (b) H,0/H,0 но (c) 1. NH,CH, 2. H,0® (d) NH(CH,), OH Dess-Martin periodinane (e) 6. Which of the following is the correct order of decreasing acid strength (more acidic > less acidic)? (Place the letter corresponding to your answer in the box). a. ICH:COOH > CICH:COOH > FCH;COOH C. BRCH:COOH > FCH;COOH > CICH:COOH d. CH:COOH > FCH:COOH > CH:CH:OH b. ClaCHCOOH > CICH:COOH > CHCOOH
The base B has pKb 5.00. (a) What is the value of pKa for the acid BH? (b) At what pH is [BH] [B]? (c) Which is the principal species, B or BH, at pH 7.00? (d) What is the quotient [B]/[BH] at pH 12.00?
URGENT!!! A 0.068 M solution of an unknown weak acid has a pH = 1.86. What is the Ka of the acid?