Please correct answer and don't use hand raiting Create a separation scheme to separate 50% ethyl 4-aminobenzoate, 40% 1,2,4,5-tetrachlorobenzene, and 10% 1,4-dibromobenzene from a 1g mixture. The solutions availableare water, 1.0 M NaOH, 6.0 M NaOH, 1.0 M HCI, 6.0 M HCI, 1M NaHCO3, saturated aqueoussodium chloride, dichloromethane, ethyl acetate, 95% ethanol, methanol, isopropyl alcohol,acetone, hexane, and toluene. Column chromatography and distillation are unavailable. Iunderstand that the first step would be an acid base extraction to separate the ethyl 4-aminobenzoate from the rest of the compounds, but how would I separate the 1,2,4,5-tetrachlorobenzene from the 1,4-dibromobenzene?

Step 1:Dissolve the mixture in dichloromethane. Dichloromethane is a non-polar solvent that can…

Answered: Create a separation scheme to separate…

Macroscale and Microscale Organic Experiments

7th Edition

ISBN:9781305577190

Author:Kenneth L. Williamson, Katherine M. Masters

Publisher:Kenneth L. Williamson, Katherine M. Masters

Chapter7: Extraction

Section: Chapter Questions

Problem 1Q

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4-bromobenzoic acid (1.0 g) is dissolved in 20 ml dichloromethane. After addition to a separatory funnel, the dichloromethane solution is treated with 20 ml 3.0 M NaOH solution. After the layers are separated, which layer(s) will contain an organic compound (non-solvent)? What would happen if the aqueous layer is treated with 20 ml 3.0 M HCl?
Carboxylic acids, including fatty acids and benzoic acids, are often present in both municipal and industrial effluents. Describe a sample preparation combined with GC method for identification and determination of carboxylic acids in raw wastewater at ppb (ug L-1) level. Point out a suitable sample preparation technique and GC conditions in details and give justifications for your choice. ОН HO, Heptanoic acid Benzoic acid HO ÇH3 ОН H3C CH3 4-Methylbenzoic acid 2,4-Dimethylbenzoic acid
Suppose you wanted to prepare a eutectic mixture of naphthalene and diphenylamine.Determine the masses of each naphthalene and diphenylamine required to make 6.000 gof a mixture at the eutectic composition.
Approximately 6 mL of concentrated perchloric acid (72%) was transferred to a bottle and diluted with about 1.0 L of water. A sample containing 250.0 mg of primary standard sodium tetraborate (Na2B4O7 .10H2O, FW= 381.42 g/mol) was dissolved in 50.00 mL water and required 27.25 mL of the HClO4 solution to reach the methyl red end point. A 25.00 mL solution of an unknown NH3 sample required 13.24 mL of the HClO4 solution. Calculate the molarity of the NH3? Use the factor label method in answering.
Caffeine's solubility limit is about 2.2 %w/w in water at 25 Celsius degrees. Now, if I prepare a 5 %w/w PVA aqueous solution. Is the solubility limit increased or decreased (at room temperature) for this PVA solution? Why? Give me a very detailed explanation please.
A 1.900-g sample is analyzed for benzoic acid content. The sample was dissolved and diluted to the mark using a 500-mL volumetric flask. A 30.0mL aliquot required 5.00mL of 0.1575M NaOH solution. Calculate the %(w/w) benzoic acid (Fwt=122) in the sample. C6H5COOH + NaOH -------------> C6H5COONa + HOH
O 1,4-dimethylbenzene O 1,3-dimethylbenzene 250 ml volume of a mixture of 0.8g of NaHCO3 and 0.2g of NaOH in 3 points water. Take 50 ml of this mixture and titrate with o.1 N of HCI. Calculate the volume of acid? ( Atomic weight = Na=23, H=1,O =16, CI =35 , C=12, N= 14) * 30 ml. 5 ml. O 25 ml. 10 ml. O 45 ml.
Approximately 6 mL of concentrated perchloric acid (72%) was transferred to a bottle and diluted with about 1.0L of water. A sample containing 250.0 mg of primary standard sodium tetraborate (NazB407 .10H2O, FW= 381.42 g/mol) was dissolved in 50.00 mL water and required 27.25 mL of the HCIO4 solution to reach the methyl red end point. A 25.00 mL solution of an unknown NH3 sample required 13.24 mL of the HCIO4 solution. Calculate the molarity of the NH3.
Q3/ A 0.80868 gm sample of a commercial phosphate detergent was ignited at a red heat to destroy the organic matter the residue was then taken up in hot HCl, which converted the P to H3PO4. The phosphate was precipitated as MgNH₂PO4.6H₂O by addition of Mg¹2 followed by aqueous NH3 after being filtered and washed. The precipitate was converted to Mg₂P₂O(222.57gm mol) by ignition at 1000 C this residue weighed represent 61.5% of the total sample mass. Calculate the percent P(30.974gm mol),O (16 gm/mol) and Mg (24.3 gm/mol) in the sample.
0.750 g of crude acetylsalicylic acid is recrystallized using ethanol as the solvent. The solubility of acetylsalicylic acid in ethanol at 78 oC is 15.45 g per 100 mL. a) How much hot ethanol is needed to dissolve the 0.750 g of acetylsalicylic acid? b) If the solubility of acetylsalicylic acid at 25 oC is 0.100 g per 100 mL, how much acetylsalicylic acid will be obtained after crystallization in ethanol at 25 oC? Use the volume from part A. c) What is the maximum percent recovery for this re-crystallization
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A student prepared 2-butanone (C4H&O) in the lab. To determine the purity of the product, the ketone was reacted with excess hydroxylamine hydrochloride liberating HCI. In this study, as much as 3.00 ml of sample was diluted to 50 mL and was treated with an excess of hydroxylamine hydrochloride. The liberated HCI was then titrated with 0.9989 M NaOH, requiring 32.68 mL to reach the end point. 1. Show how 2-butanone can be prepared! 2. Determine the percent purity of the sample, given that the density of 2-butanone is 0.805 g/mL!

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