Which of the following is consistent with the principles of green chemistry when comparing different methods for synthesizing a target compound? (Note: %AE is percent atom economy). (pick one option) 1. small %AE and small E-factor 2. large %AE and large E-factor 3. small %AE and large E-factor 4. large %AE and small E-factor

Which of the following is consistent with the principles of green chemistry when comparing different methods for synthesizing a target compound? (Note: %AE is percent atom economy). (pick one option) 1. small %AE and small E-factor 2. large %AE and large E-factor 3. small %AE and large E-factor 4. large %AE and small E-factor

EBK A SMALL SCALE APPROACH TO ORGANIC L

4th Edition

ISBN:9781305446021

Author:Lampman

Publisher:Lampman

Chapter88: Column Chromatography

Section: Chapter Questions

Problem 5P

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A 20.0 mL sample was analyzed using the Mohr method. Calculate the percent (w/v) CI (FM = 35.45) if 25.00 mL of 0.1234 M AgNO3 was used to form the yellow-orange endpoint. O 35.9% O 5.47% O 2.19% O 0.547%
a.) What is the linear equation for the calibration plot? b.) What is the amount of sulfate in the water sample?
A water sample was analyzed for iron content using the iron-phenanthroline method. Using the set of data from Question 15 (as presented below), Reagent Blank Absorbance Absorbance (au) Reagent Blank Absorbance 0.003 Concentration of Stock Solution: 10 ppm Volume of Stock Solution (mL) Total Volume of Standard Solution (mL) 0.50 10.00 1.00 10.00 2.00 10.00 3.00 10.00 4.00 10.00 5.00 10.00 Volume of Trial Unknown Solution (mL) 1 5.00 2 5.00 3 5.00 find the true concentration of Fe2+ of the original sample. A) 5.12 ppm B) 2.56 ppm 2.52 ppm D) 5.05 ppm Concentration of Standard Solution (ppm) Total Volume of Unknown Solution (mL) 10.00 10.00 10.00 Absorbance (au) 0.012 0.132 0.267 0.349 0.428 0.560 Absorbance (au) 0.289 0.296 0.281
Standardization of 0.10 M HCl1. Take three (3) clean and properly labeled 250-mL Erlenmeyer flasks. Into the three flasks, weigh 0.1 g of the primary standard Na2CO3 to the nearest 0.1 mg. Record the weights of the primary standard.2. Add about 75.0 mL of boiled distilled water and swirl to dissolve the solids.3. Add 2 to 3 drops of phenolphthalein indicator. Record the initial burette reading and titrate with the prepared 0.10 M HCl solution until phenolphthalein endpoint.4. Record the final burette reading for each titration in your data sheetDetermination of Ksp and Molar Solubility1. Add Ca(OH)2 to 250.0 mL distilled water with stirring until equilibrium is achieved. 2. Filter the undissolved precipitate. Measure out 50.0 mL of the supernate into a 250-mL Erlenmeyer flask using a pipette.3. Add a few drops of phenolphthalein indicator and titrate with standardized HCl solution until endpoint is achieved.4. Record the volume the HCl solution used. Perform two more trials.…
Standardization of 0.10 M HCl1. Take three (3) clean and properly labeled 250-mL Erlenmeyer flasks. Into the three flasks, weigh 0.1 g of the primary standard Na2CO3 to the nearest 0.1 mg. Record the weights of the primary standard.2. Add about 75.0 mL of boiled distilled water and swirl to dissolve the solids.3. Add 2 to 3 drops of phenolphthalein indicator. Record the initial burette reading and titrate with the prepared 0.10 M HCl solution until phenolphthalein endpoint.4. Record the final burette reading for each titration in your data sheetDetermination of Ksp and Molar Solubility1. Add Ca(OH)2 to 250.0 mL distilled water with stirring until equilibrium is achieved. 2. Filter the undissolved precipitate. Measure out 50.0 mL of the supernate into a 250-mL Erlenmeyer flask using a pipette.3. Add a few drops of phenolphthalein indicator and titrate with standardized HCl solution until endpoint is achieved.4. Record the volume the HCl solution used. Perform two more trials.…
An experiment is started with 6g of a 1:1:1 ratio mixture of benzoic acid, 2-naphthol, and hydroquinone dimethyl ether. The experiment is finished with 0.2 g of 2-naphthol. What is the percent recovery? 10% 50% 3% 16%
Limiting Reagent EXAMPLE Limiting Reagent Reaction 1-9 requires one mole of oxalate for each mole of calcinum. Ca + Co - CalC,0.) - H,O(0) (1-9) Oulte Caki malate Ir you mix 1.00 g of CaCl; (FM 110.98) with 1.15 g of NaC0, (FM 134.00) in water. which is the limiting reagent? What fractiou of the noolimiting reagent is left over? Solution The available moles of each reagent, are LI5 g NaCO. K S manol Co 100 g CaCl 110.98 g/mol -9.01 mnol Ca 134.00 p/mol The reaction requires I mol Ca for I mol C0 . so oxalate will be used up first The Ca" remaining is 9.01 (0.43 mmol/9.01 mmol) - 4.8% 8.58 - 0.43 mmol. The fraction of unreacted Ca" is TEST YOURSELF The reaction SHCO, + 2Mno, + 6H 1OCO, + 2Ma+ KH,0 requires 5 mol H,CO, for 2 mol MnO, If you nix L.15 g NaCO, (FM 134.00) with 0.60 g KMn0, (FM 158.03) and ekcess aqueous acid, which reactant is limiting? How much CO, is produced? De
Table of chemicals and reagents with their physicochemical properties (name, molecular formula, molecular weight, pKa, melting point, boiling point, etc.) Write a short outline or a flow diagram of the procedure List and safety issues Read and understand the MSDS information for each chemical used in this practical Experimental procedure Please do not scratch the clear sides of the UV cuvettes as this will invalidate your results. Part 1: Preparation of a calibration curve A calibration curve should be constructed using at least five concentrations of the pure paracetamol standard supplied in the range 3-15 ug/mL as follows: Weigh about 150 mg of paracetamol accurately and transfer to a 200 mL volumetric flask. Add 50 mL of o.1 M NaOH and dilute to about 100 mL with deionised water (DI). Shake and make up to volume with DI water. Dilute 10 mL of the resulting solution to 100 mL (volumetric flask) with DI water (= stock solution). Prepare standard solutions containing 3, 6, 9, 12 and 15…
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Sample Physical Appearance 0.1 M Na2CO3 0.1 M CaCl2 Na2CO3 + CaCl2 mixture Part II filtrate + CaCl2
A sample of impure oxalic acid which weighs 0.4750 gram requires 35.6 mL of 0.20N NaOH. Calculate the percentage oxalic acid in the sample.
Convert the amount of spiperone in each sample to the concentration in the 1 ml total volume of assay tube. Express this concemtration in molar in standard form.