A 5.00 ml sample of white vinegar is diluted in acetone and analyzed by GC-TCD using 1-propanol as internal standard and a ZB-Wax20 M Column. The most retained component in the analysis is: O a. Methanol Ob. Acetic Acid Oc Formic Acid Od. Acetone Oe 1-propanol
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- A 5.00 mL sample of white vinegar is diluted in acetone and analyzed by GC-TCD using 1-propanol as internal standard and a ZB-Wax20 M Column. The most retained component in the analysis is: а. Acetone O b. Methanol с. 1-propanol d. Formic Acid О е. Асetic Acidh) i) j) Ph + НО OSI(CH3)3 Br PPH3 1) "BuLi /THF/rt / 1.5 h H CH3 homo /rt / 1 h 2) -Si(CH3)3 OCH3 TiCl4 CH₂Cl₂/-78°C / 15 min PPh3/1₂ (1 eq) imidazole / THE 0°C-itFollowing titration analysis, a sample of a fruit juice was found to contain 8.9 mg cm-3 ascorbic acid. Given that the Mr value for ascorbic acid is 176.1 Da, calculate the value of the ascorbic acid concentration expressed in units of mmols dm-3 then enter it
- A 200 mL water sample was treated with SPE column for pe- concentration of a certain pesticide. The final solution (24 mL) was analysed by HPLC and the .pesticide content was 1.2 ppm :The pre-concentration factor is 12.5 O 6.7 O 11.4 O 8.3w juce Trials asked to determine the percentages of citric acid in the freshly squeezed and bottled lemon following data were obtained. Freshly Squeezed lemon juice 12 3 Volume of Titrant (ml) 1 25.5 Types of Lemon Juice Freshly Squezzed Bottled II 25.5 25.5 Bottled Lemon juice 12 1 18.5 Mass of 25 ml (g) 25.6 26.7 18.3 Click Save and Submit to save and submit. Click Save All Answers to save all answers. 3 Given that the molarity of NaOH is 1.10 M (after standardization with KHP), determine the mass of citric acid in the Bottled juice (8) 18.3 15°CC B) C) D) E) (C6H5)3P NH₂ Zn(Hg) HCI ۵۰۰ NaOH heat DMSO 1. Excess CH31 2. Ag₂O, H₂O 3. heat -O 53% 35°F Cloudy 12
- Ooldtion Table 1. Measurements for standardization of NaOH Trial 1 Trial 2 Trial 3 1] Tared mass of KHC3H4O4 (9) 0.374 0.325 0.357 12] Burette reading of NaOH, initial (mL) 4.59 3.61 4.03 [3] Burette reading of NaOH, final (mL) 22.03 18.77 21.17 Part B. Molar Concentration of an Acid Solution Enter the number corresponding to the type of acid you have 1. HA 3 2. H2A 3. H3A Enter the unknown number. 21 Table 2. Measurements for titration of unknown acid Trial 1 Trial 2 Trial 3 [1] Volume of acid (mL) 25.0 25.0 25.0 [2] Burette reading of NaOH, initial (mL) 2.13 2.48 3.68 [3] Burette reading of NaOH, final (mL) 24.10 24.52 25.56 Part C. Percentage by Mass of an Unknown Solid Enter the number corresponding to the type of acid you have 1. HA 3 2. H2A 3. H3A Enter the unknown number. 30 Molar mass of the unknown acid 192.14 Table 3. Measurements for titriation of solid Trial 1 Trial 2 Trial 3 [1] Mass of sample (g) 26.334 29.157 27.111 [2] Burette reading of NaOH, initial (mL) 3.21 1.48…10:29 0. O ? 86% AIATS For Two Year Medic. A 73 /180 Mark for Review The reagent required for the following conversion is CH3. C=C CH3-C = C- CH, → H CH3 Na/Liquid NH3 Zn/HCI LIAIH4 H2, Pd/C, quinoline Clear Response IIIThe concentration of purified OXA-M290 is tested with a BCA assay. Serial dilutions of a bovine serum albumin (BSA) stock solution are prepared, then pipetted into a 96-well plate; each dilution of the BSA standard is tested in triplicate. Then, bicinchoninic acid and Cu2+ ions are added to all of the wells of the plate. After incubating the plate for 1 hour, a microplate reader is used to measure the absorbance of all of the wells in the plate at 560 nm. This generates the following data: BSA conc. (μg/mL), Replicate 1 Absorbance, Replicate 2 Absorbance, Replicate 3 Absorbance 40, 1.360, 1.403, 1.481 20, 0.750, 0.745, 0.810 10, 0.380, 0.344, 0.398 5, 0.198, 0.160, 0.183 2.5, 0.090, 0.100, 0.085 1.25, 0.038, 0.043, 0.051 0.625, 0.024, 0.028, 0.019 Prepare a calibration curve using these data. You can use Excel, R, SPSS or an equivalent graphing software. In this graph, plot absorbance (y-axis) against the concentration of the protein standard (x-axis). Calculate and plot…
- Tonight to J 005.0 of babbs al DHM AE0.0 to Im 00.E nariw afluze nolautors to (6 points) 0.1 mole of CH3NH2 (Kb = 5 x 10") is mixed with 0.08 mole of HCI and diluted to 1L. What will be the H* concentration? OH= CH3NH2 + H CH3NH3* HCEA a Ama W CEA zoom HMAC=4f5e010fa2b0f09f550afc98d120614d#10001 e URL Part B Given the two reactions Hyd 3. PbCl2 (aq) = Pb²+ (aq) + 2Cl¯ (aq), K3 = 1.81x10-10, and 4. AgCl(aq) = Ag+ (aq) + Cl¯(aq), K4 = 1.21x10-4, what is the equilibrium constant Kfinal for the following reaction? Kfinal Submit Express your answer numerically. ►View Available Hint(s) 0 0 CEA | Fun | OpF | Opr| Sch | G bes Cro VE ΑΣΦ MacBook Pro PbCl₂ (aq) + 2Ag+ (aq) = 2AgCl(aq) + Pb²+ (aq) P Pearson ? < IX □ ☆ + 5 of 16 Review I Constants I Periodic Table EN 0g) h) i) j) H₂C Ph OCH3 HO OCH₂Ph OSI(CH₂)3 Br PPha + 2 1) "Buli /THF / rt/1.5 h 2) OsO4/ NalO4 acetone /ether LOCH3 -Si(CH3)3 CH3 /nt/1 h CH₂Cl₂-78°C / 15 min PPn, /1₂ (1 eq) imidazoie / THE 0°C - rt