What are the products A and B? 1. LDA 1. NaOEt A 2. CH3CH2Br 2. Ph Br 1. NaOEt 1. LDA 2. CH3CH2Br 2. Ph Br B O a. ○ b. C. O d. A: A: & Ph B: Ph B: A: B: Ph 0= A: a B: & ○ e. A: Ph O Ph B: Ph Ph Ph Ph Ph
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- 1. Et O 1. CH3MGCI; 2.heat; H3C- 3. dil. HCI H3C = -CH2OH m. NC heat EN Ph OEt N2 n. Rh2(OAc)4 heat p.15. What is the pH of 0.630 M CH3NH2Cl solution? (kb of CH3NH2 = 3.45 x 10-5) A. 9.13 B. 4.10 C. 5.75 D. 4.87 E. 5.902. Identify the type of reaction depicted: Ph2 80 *C HC-CH, + "Pd CHs DMSO ais a. H-H +H2 Ph Ph, CI Oc Phy Ph, Ph, b. HAUCL MW 160°C
- For phosphoric acid, H3PO4, the Ka₁ = A. [PO][H¹+]/[H₂PO4] B. [HPO][H] / [H₂PO4] C. [H₂PO4¹][H] / [H₂PO4] D. [H3PO4]/[H₂PO4¹-][H¹+] E. [H3PO4]/[PO4³-][H¹+]³S. Suppose you have already compared the pH values of two substances using 0-14Īpaper. When would a follow-up test using 4.5-7.5 paper be most helpful? O A. when both substances had a pH value of about 3 on the 0-14 paper O B. when both substances had a pH value of about 6 on the 0-14 paper O C. when both substances had a pH value of about 9 on the 0-14 paper O D. when one substance had a pH value of about 5 and the other substance had a pH value of about 7 on the 0-14 paper324 10. What is the acid dissociation constant for H2PO4* if the pKы1, pкb2, and pKыз for phosphoric acid are 1.64, 6.80, and 11.8, respectively? a. 5.25 × 10-8 b. 4.41 x 10-13 C. PR d. 6.37 x 10-8 6.37 x 10-3
- In a highly basic solution, pH = 13, the dominant form of glycine is: a. NH2—CH2—COOH. b. NH2—CH2—COO–. c. NH2—CH3+—COO–. d. NH3+—CH2—COOH. e. NH3+—CH2—COO–.Dilute solution of unknown weak acid required 30 ml of 0.2 M NAOH to reach phenolphthalein end point. Calculate the molecular weight of the acid if sodium salt was found to weigh 0.3g, the reaction is one to one. O a. 50g/mole O b. 100g/mole O c. 200g/mole O d. 23g/mole51. Which of the following conjugate acid/conjugate base pair serves as a buffering system in higher animals? A. +H3N-CH₂-COOH/H₂N-CH₂-COO- B. phosphate dibasic (HPO )/PO phosphate tribasic C. carbonic acid (H₂CO3)/bicarbonate (HCO3) D. succinic acid/succinate
- 16. Which of the compounds shown in the figure are amphoteric? a. b. C. d. e. HO I only Ill only I and II only II and III only None of the above are amphoteric 1. oxybutynin OH OH OH II. clindamycin OH III. ramipril |ades A Moving to another question will save this response. ne Learning ntation Question 17 pring The conjugate base of H 2PO 4 is p and Resources O HPO42. O H3PO4. urse Dashboard pols O PO43. O H2PO42. O H3PO42. A Moving to another question will save this response. SAMSUNG -> %24 %23we How many grams of H2SO4 (98.lg/mol) are required to react with 4.0g of NaOH(40.0 g/moſ) in- this neutralization reaction? 32. H2SO4 + 2NAOH N22SO4 + 2H2O а. 2.4g b. 4.9g c. 9.fg d. 20.0g e. None of the above
