Sulfur – yellow powder with a strong and somewhat unpleasant odor has anti-inflammatory, astringent, detoxifying and disinfectant properties. In addition to these - benefits, sulfur has been used to treat skin problems for a long time and remains a valuable ingredient in skin care products, especially soaps. The determination of the sulfur concentration in a soap sample was performed by burning 3.130 mg of crushed sample producing an amount of SO3. The SO3 produced was collected in water and completely converted to H2SO4. The acid formed was titrated with a 0.01530 mol L^-1 NaOH solution using 2.15 mL. Calculate the % (w/w) of S in the soap sample. Data: O = 16.00 S= 32.07 H = 1.008

Sulfur – yellow powder with a strong and somewhat unpleasant odor has anti-inflammatory, astringent, detoxifying and disinfectant properties. In addition to these - benefits, sulfur has been used to treat skin problems for a long time and remains a valuable ingredient in skin care products, especially soaps. The determination of the sulfur concentration in a soap sample was performed by burning 3.130 mg of crushed sample producing an amount of SO3. The SO3 produced was collected in water and completely converted to H2SO4. The acid formed was titrated with a 0.01530 mol L^-1 NaOH solution using 2.15 mL. Calculate the % (w/w) of S in the soap sample. Data: O = 16.00 S= 32.07 H = 1.008

EBK A SMALL SCALE APPROACH TO ORGANIC L

4th Edition

ISBN:9781305446021

Author:Lampman

Publisher:Lampman

Chapter13: Isolation Of Eugenol From Clov

Section: Chapter Questions

Problem 9Q

See similar textbooks

Similar questions

3What is the ratio strength of benzalkonium chloride in a nasal spray that contains 125 µg/mL of the ingredient? a 1:8 b 1:80 c 1:800 d 1:8000
Over time, as their free fatty acid (FFA) content increases,edible fats and oils become rancid. To measure rancidity, the fator oil is dissolved in ethanol, and any FFA present is titrated withKOH dissolved in ethanol. In a series of tests on olive oil, a stocksolution of 0.050 Methanolic KOH was prepared at 25C, storedat 0C, and then placed in a 100-mL buret to titrate any oleic acid[CH₃(CH₂)₇CH=CH(CH₂)₇COOH] present in the oil. Each offour 10.00-g samples of oil took several minutes to titrate: thefirst required 19.60 mL, the second 19.80 mL, and the third and fourth 20.00 mL of the ethanolic KOH.(a) What is the apparent acidity of each sample, in terms of mass% of oleic acid? (Note:As the ethanolic KOH warms in the bu-ret, its volume increases by a factor of 0.00104/C.)(b) Is the variation in acidity a random or systematic error? Ex-plain.(c) What is the actual acidity? How would you demonstrate this?
What is the molarity of phosphoruc acid in a solution labelled 20.0% phosphoric acid (H3PO4) by weight with a density = 1.12g/ml?
6. You have a 0.5M stock solution of NaCI (Formula Weight: 58.4g/mole), a 250mM stock solution of glucose (Formula Weight; 180.2g/mole), and a bottle of solid Tris base Formula Weight: 121.1g/mole). How would prepare (be specific) 250mL of a single solution containing 150mM Tris, 0.025M glucose, and 50mM NaCI.
Prepare 0.1 M solutions of NaOH and 0.1 M ethyl acetate using high-purity distilled water. So, weight desired amount of NaOH and ethyl acetate and dissolved in dH2O to prepare stock solution in equal molarity. Mw (NaOH) = 40.0 g/mol , Mw (EtOAc)= 88.1 g/mol, Density(EtOAc): 0.898 g/cm3
What volume of water should be added to 100.0 mL of a 0.500 N Cr2(SO4)3·18H2O solution to obtain a final concentration of 0.075 M? Show step-by-step solution.
You have a 0.05M stock solution of NaCI (Formula Weight: 58.4g/mole), a 0.25Mstock solution of glucose (Formula Weight; 180.2g/mole), and a bottle of solid Tris base (FormulaWeight: 121.1g/mole). How would prepare (be specific) 150mL of a single solution containing75mM Tris, 15mM glucose, and 5mM NaCl.
What volume of a 0.186 molL−1 Na3PO4 solution is necessary to completely react with 91.9 mL of 0.103 molL−1 CuCl2?v
9. How you would prepare a 1:25 dilution (v/v) of the solution prepared above?
Using the blue bars as fillable selections in the ICE/RICE table, find the mass of NaCH3COO (I got the answer with Henderson Hasselbalch, but this problem requires the RICE table to be filled, and I'm unsure how to approach it).
Firstly, What is the final molar concentration of a 500.0ml solution prepared from 15.0 ml of a 12.0 M solution of sulfuric acid? Secondly, solid potassium permanganate and standard laboratory equipment are available. Briefly describe how you prepare 100.0 ml solution of 0.050 M potassium permanganate? Potassium permanganate Mr= 158.03 g mol-1 Thirdly, are methonal (CH3OH) and acetic acid (CH3COOH) expected to be miscible? explain with reasoning
a) What mass of Fe(NH4)2(SO4)2•2H2O(s) is required to prepare a 500 mL solution containing 100 ppm (m:v) in Fe? b) Using this stock solution, what aliquot must be used to prepare calibration solutions, 100 mL volume, of the following concentrations: 0.100 ppm, 0.500 ppm, 2.00 ppm, 4.00 ppm, and 7.00 ppm.