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- Given the Ka values (in parentheses) for the following acids: HSO4– (Ka= 1.2 x 10–2); HNO2 (Ka= 4.0 x 10–4); HC2H3O2 (Ka= 1.8 x 10–5); Calculate Kc values for the following acid-base equilibria: (a) HSO4–(aq) + C2H3O2–(aq) ⇌ HC2H3O2(aq) + SO42–(aq) (b) HC2H3O2(aq) + NO2–(aq) ⇌ HNO2(aq)+ C2H3O2–(aq)please provide the machanisms of 1a, 1e, 1fPlease answer 22b c both.
- Heating compound X with aqueous formaldehyde forms Y (C17H23NO), which has been converted to a mixture of lupinine and epilupinine, alkaloids isolated from lupin, a perennial ornamental plant commonly seen on the roadside in parts of Alaska. Identify Y and explain how it is formed. HO но CH=0 one step NH2 C,,H23NO lupinine epilupinine PhAbout defroxamine (all are correct except Select one: it is a water instable compound produced as injectable powder for instant reconstitution used to treat hemochromatosis due to its poor GIT absorption administered as I.M and I.V injection the precursor is a ferric ion natural product obtained from the bacteria Streptomuces pilosis modified through removal of iron III then converted as mesylate salt its a tridentate chelating agent of great water solubility as well as stability forming a hexagonal complex3. Which is the stronger acid: (a) Benzoic acid with a Ka of 6.5 x10-5 or hydrocyanic acid with a Ka of 4.9 x 10-10? (b) Boric acid with a pKa of 9.14 or carbonic acid with a pKa of 6.37
- The pKa, of the conjugate acid of morpholine is 8.33. (a) Calculate the ratio of morpholine to morpholinium ion in aqueous solution at pH 7.0. (b) At what pH are the concentrations of morpholine and morpholinium ion equal?X Incorrect. The ligand in 1MPO is a where the residue of the ligand hydrophobically interacts with Tyr 6 and Tyr 41 of Chain A. tetrasaccharide; third tetrasaccharide; second tetrasaccharide; second pentasaccharide; second(a) What weight of glycine (pKal- 2.4; pKa - 9.6), and what volume of IM HCI are required to make 100 ml. of 0.3M buffer, pH 2.4? (b) What weight of glycine and what volume of IM NaOH are required to make 100 ml of 0.3M buffer, pH 9.3? Remember that glycine is sold as the zwitterion salt.
- 7. Answer all parts of this question. The synthesis of the drug minoxidil is shown below. Minoxidil is a K+ channel opener and vasodilator used in the treatment of hair loss. CI NH2 POCI3 NH3 HN NH [6] CI CI [7] CI NH2 (13) (14) [8] MCPBA NH2 NH NH2 No N. NH2 [9] CI NH2 (15) Minoxidil (a) The synthesis of compound (13) is achieved using three molar equivalents of phosphoryl chloride. This reaction [6] proceeds via a mechanism similar to that seen in the Vilsmeier reaction. Provide a complete mechanism for the substitutions of all three oxygens. What is the driving force for this reaction [6]? NN 8.Trans-amminecarbonyl-bis(ethylenediamine)iron(III) cation is optically active (i.e. has a non-superimposable mirror image). Select one: O True O FalseWhich method can be used to prepare CH3CH2CH2CH2NH2? NH3 (large excess) (a) CH3CH2CH2CH2B. (1) NaCN (2) LİİAIH, (3) H20 (b) CH3CH2CH2B NH3, mild acid (c) CH3CH2CH2CHO NABH3CN or NABH4 (d) All three methods would work. Answer (a)