Will the melting point increase or decrease with the benzoic acid, 4-chloroanaline, and naphthalene if : -You do not remove all of the HCl from the first extraction (mixture) -You forget to do the NaOH extraction (aq layer) -You do not rotovap all of the solvent in the final step (organic layer)
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Will the melting point increase or decrease with the benzoic acid, 4-chloroanaline, and naphthalene if :
-You do not remove all of the HCl from the first extraction (mixture)
-You forget to do the NaOH extraction (aq layer)
-You do not rotovap all of the solvent in the final step (organic layer)
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- A student was careful to make and stir all of her standard solutions immediately before measuring their turbidity for her calibration curve. However, she let her tap water solutions sit for 10 minutes prior to measuring their turbidity. If she measured the top portion of the solution, would her experimental sulfate ion concentration be higher or lower than it should be?The solute in the liquid mixture can be separated from the liquid solvent. O Gas-liquid extraction Solid-liquid extraction Liquid-liquid extraction None of theseProvide a flow chart analogous to separate a diethyl ether solution containing benzoic acid, 2-naphthol (a weak acid), 4-nitroaniline (a weak base), and naphthalene
- Explain how you could separate an equimolar mixture of Compound A, B and C. (a flow chart). Organic solvent: ether,methylenechloride; Aqueous solution: HCI (ag),NaOH (ag), NaHCO3(ag)The separation and purification processes given below and the method used against them are given. Which or which of these pairings are correct? Brewing the tea - Extraction Purification of water from impurities-Chromatography Separating olive pomace from oil while olive oil is being produced - Decantation Obtaining oil fractions - Ordinary distillation Obtaining essential oils and using them in perfume making - Water-steam distillation A. I, IV, V B. I, II, III, IV, V C. I, II, V D. I, II, III, V E. I, II, III, IVTable 1. Solubility Tests. Functional Group Observations (specify type if any) Sample in concentrated (+/-) H2SO4 Color orange Hydroxyl group Hydroxyl group Hydroxyl group 1-butanol Color orange 2-butanol Color orange diisopropyl ether Look at the structures of compounds tested for solubility in concentrated H2SO4. What generalization can be made for a substance to be soluble in concentrated H2SO4 ?
- Emmett, a sophomore chemistry major, was trying to separate an unknown mixture. His instructor told him that there was a carboxylic acid, phenol, and amine present in the mixture. He dissolved 3 g of the unknown in 10 ml of t-butyl methyl ether. He then added 10 ml of 3M sodium hydroxide to the mixture. He used a separatory funnel to separate the layers and collected the aqueous layer in an Erlenmeyer flask labeled fraction 1. Then he added 10 ml of 1.5M sodium bicarbonate to the remaining ether. He separated the layers, and collected the aqueous layer in an Erlenmeyer flask labeled fraction 2. Finally he added 10 ml of 1.5 M hydrochloric acid to the ether, and separated the aqueous later in an Erlenmeyer flask labeled fraction 3. Emmett neutralized the respective fractions. He obtained precipitate in fraction 1, and fraction 3. He ran an IR of the solid obtained in fraction 1 and saw a broad absorption at 3500-3300 cm-1 and a sharp absorption at 1710 cm-1. Fraction 3 showed…Find the intermediates.show step-by-step solution.Concentration of the KSCN stock solution, M Volume of the KSCN stock solution, mL Initial molar concentration of SCN in a 50-ml flask, M PART A. Establishing the Beer's Law Coefficient: blank 0 0 solution 2 1.00×10-³ 2.00 solution 3 1.00×10-3 5.00 solution 4 1.00×10-³ 10.00 solution 5 1.00-10-3 15.00
- Drag the labels to the correct position to indicate the contents in each of the separating funnel during each separation step: First extraction step water / HCI NaCl Sodium benzoate 2N NaOH Keep Second extraction step Ethyl acetate Insignificant amount of solute Discard Benzoic acidAlligation Medial and Alligation Alternate. Show your complete solution. 1. How many mL of 70% ethyl alcohol and 30% ethyl alcohol should be mixed to prepare 100mL of 60% ethyl alcohol? Volume of 70% ethyl alcohol = ? Volume of 30% ethyl alcohol = ?Consider the following scenario: After the first compound elutes off of the column, you collect multiple fractions without seeing the next compound begin to elute. What change might you want to make before you continue taking fractions?