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- OC1 O D.4 QUESTION 10 An impure aqueous sample of I was extracted with ether. The ether layer was then extracted with 0.1 M HCI. Which layer will contain the compound after the second extraction? NH2 O A. both, because I is soluble in both, 0.1 M HCl and ether. O B. ether layer O C. none, because I doesn't dissolve in ether in the first extraction. O D. aqueous layer (0.1 M HCI) QUESTION 11 Which carbonyl compound CANNOT form an enolate ion in an aldol condensation reaction? Click Save and Submit to save and submit. Click Save All Answers to save all answers. pe here to search PriSc F10 F11 F12 F7 F8 F9 Esc F3 F4 F1 & 23 7 8 4 W E T ab G H J K oSLk C VBN M All CoIf 100 ml of a 1:1500 methylbenzethonium chloride lotion is diluted with an equal volume of water, what will be the ratio strength of this dilution? O a. 1:67 O b. 1:100 OC. 1:6000 O d. 1:3000 O e. 1:15000What is the role of Glycerin in the assay of Boric Acid?I. The reagent prevents the formation of pink color earlier than the expected endpoint.II. The reagent allows the reaction of protons from the acid sample with the hydroxyl ions from the titrant.III. It enhances the water solubility of the difficultly soluble boric acid. a. I, II & III b. II & III c. I & II d. I only e. I & III
- 1. What method of tonicity adjustment will be used in the preparation? a. Sprowl's Method b. Cryoscopic Method c. NaCl Equivalent Method d. White-Vincent Method 2. How many grams of sodium chloride must be added to the Pilocarpine solution to make it isotonic?1.What is the significance when KD is either a small or large value? 2. Methyl alcohol and ethyl alcohol are poor extraction solvents. Why?3. What is the major disadvantage of using ether as an extracting solvent?Alcohols A and B formed layers with Lucas reagent within 10 minutes. However, compound A formed brown precipitate with KMnO4 while compound B did not. Which are the possible identities of compounds A and B? a. isopropanol and tert-butanol b. ethanol and methanol c. propanol and tert-butanol d. isopentyl alcohol and isopropanol
- TEST/REAGENT EXPERIMENTAL OBSERVATION A. Orcinol a. Brick red precipitate B. Benedict's test b. Magenta solution C. Ammoniacal silver nitrate c. Colored complex D. FeCl3 d. Red to blue litmus E. C6H5SO₂Cl, excess NaOH e. Blue green compound NaOH, H₂O, heat F. f. Decolorization G. t-butyl chloride/ AICI3 g. Liquid residue (lower layer) H. Br₂ in water, dark h. Silver mirror i. Orange to red crystals I. NH₂OH-HCI, KOH, FeCl3 J. Resorcinol K. 2,4-DNPH j. Red condensation product Orange precipitate k. L. lodoform test 1. Yellow solution m. Yellow precipitate Given the following reagents above, what could best differentiate the two compounds below? Provide also the letter of the expected experimental observation and state which of the two would give positive result. FB HO НО ||I IT HT Illo IlWhich of the following mixtures can be efficiently separated by simple distillation? a.) H2ONACI B.) CH3OH / H20 C.) CH3CH2CH2CH2CH2CH3 and CH3CH2CH2CH2CH3 D.) CH3COCH3 (acetone) and CH3CH20CH2CH3 (diethyl ether)17. Which solvent mixture would be the most polar?a. 100% hexanesb. 90:10 hexanes/acetonec. 80:20 hexanes/acetoned. 50:50 hexanes/acetone
- TEST/REAGENT EXPERIMENTAL OBSERVATION A. Orcinol a. Brick red precipitate B. Benedict's test b. Magenta solution C. Ammoniacal silver nitrate c. Colored complex D. FeCl3 d. Red to blue litmus E. C6H5SO₂Cl, excess NaOH e. Blue green compound F. NaOH, H₂O, heat f. Decolorization G. t-butyl chloride/ AICI3 g. Liquid residue (lower layer) Silver mirror H. Br₂ in water, dark h. I. NH₂OH-HCI, KOH, FeCl3 i. Orange to red crystals J. Resorcinol Red condensation product Orange precipitate K. 2,4-DNPH k. L. lodoform test I. Yellow solution m. Yellow precipitate Given the following reagents and tests above, what could best differentiate the two compounds below? Provide also the letter of the expected experimental observation and state which of the two would give positive result. i تر j. "NH₂AP Question // Q 5) Using the graph below, find the slope (and its unit). What letter(s) the Beer's law does the slope represent? 0.500 (0.100, 0.485) 0.400- (0.075, 0.364) 0.300- (0.055, 0.243) 0.200- 0.100- (0.025, 0.125) 0.050 0.100 Concentration (M) AP Question // Q 6) Write a balanced net ionic equation for the reaction between barium nitrate and copper(II) sulfate. Q 7) If the mass of barium sulfate is 0.372 g, find the number of the moles. Questions 8- 9 refer to the choices below. A. Chromatography B. Crystallization C. Fractional distillation D. Filtration Absorbance12. In IR analysis, solid samples are prepared in KBr pallet O O Thin film O Nujol Mull Organic compound sample in the solvent