Naphthalene, C10H8 is insoluble in water but sublimes easily when heated. How could you separate a mixture of naphthalene and NaCl? Suggest two different methods. asap
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Naphthalene, C10H8 is insoluble in water but sublimes easily when heated. How could you separate a mixture of naphthalene and NaCl? Suggest two different methods.
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- The mixture contains benzoic acid, 2-napthol, and naphthalene. Dissolve the mixture in the polar solvent ether. When you react the mixture with 10% NaHCO3(sodium bicarbonatea weak base in aqueous solution) reacts with benzoic acid and forms sodium benzoate an ionic compound (similar to NaCl) that dissolves in aqueous solution (heavier than ether in density) and goes to the bottom of the centrifuge tube or to the bottom of the separatory funnel forming two layers. Then remove the bottom aqueous layer and collect in a beaker labeled as bicarbonate extract. Acidify the bicarbonate extract in the beaker to give benzoic acid. The top ethereal layer contains in the centrifuge tube or separatory funnel 2-napthol and naphthalene. To this top layer add 10% NaOH (sodium hydroxideis a strong base in aqueous solution reacts with only 2-napthol, a weak acid forming 2-napthoxide an ionic compound soluble in aqueous solution (similar to NaCl) that goes to the bottom of the centrifuge tube or to…True or False: Carboxylic acids containing six or more carbon atoms per molecule are more soluble in 3 M sodiumaqueous hydroxide than in dichloromethane.Q9 9a: Rank the water solubility of the following compounds: H2N NH2 CH3-0-CH2CH3 H3C. H3C° NH2 TH. 9b: Certain C-H functional groups can form weak hydrogen bonds. Why would such a functional group be more likely to be a H-bond donor when the C (carbon) is next to N (nitrogen)? (explain in 2-3 sentences) 9c: Explain why water forms nearly spherical droplets on the surface of a freshly waxed car. Define the effect from your knowledge in biochemistry (explain in 2-3 sentences)
- beer. A 2.39- mg sample of safrole was dissolved in 103.0 mg of diphenyl ether. The solution had a melting point of 25.70°C. Calculate the molecular weight of safrole. The freezing point of pure diphenyl ether is 26.84°C, and the freezing- point- depression constant, Kf, is 8.00°C/m.When 1.78 g of a certain molecular compound X are dissolved in 85. g of dibenzyl ether ((C,H;CH,),0), the freezing point of the solution is measured to be 0.9 °C. Calculate the molar mass of x. If you need any additional information on dibenzyl ether, use only what you find in the ALEKS Data resource. Also, be sure your answer has a unit symbol, and is rounded to the correct number of significant digits. 미Need help ASAP!! thanks! The minimum volume of boiling water is used to dissolve 1.50 g acetanilide. The hot solution is cooled to room temperature and the acetanilide recrystallizes. What mass of acetanilide remains dissolved in water? (solubility of acetanile at 100o C is 5 g/100 mL and at room temperature is 0.54 g/100 mL). (Enter a number only with no g unit.)
- Calculate the vapor pressure (in mmHg) above of solution containing 50.0 g of ethylbromide (CH3CH2Br) and 29.484 g of 1,2-ethanediamine (NH2CH2CH2NH2) at 21.0oC. The vapor pressure of ethyl bromide at 21.0oC is 400 mmHg. The vapor pressure of 1,2-ethanediamine at 21.0oC is 10.0 mmHg. Your answer should have 3 significant figures.A mixture of ethanol, benzaldehyde and KMnO4 is mixed together. Would you expect a precipitate to form based on the reactants functional groups?Which aqueous solution would you add to a mixture of aniline (structure on the left) and naphthalene to separate the compounds? NH2 O NAOH(aq) O HCI(aq) O NaBr(aq) О КОНaq)
- ORGANIC COMPOUND USING SOLUBILITY. FILL OUT THIS TABLE SAMPLE WATER 5% NAHCO3 5% HCL 5% NAOH CONC H2SO4 ETHER LITMUS RED LITMUS BLUE CLASSIFICATION BENZOIC ACID BROMOBENZENE ETHYLENE GLYCOLWhich of the following compounds can form hydrogen bond with water: ethanol, 1-decanol, glycerin, sucrose and urea? State a reason why each compound will or will not form hydrogen bond with water. What effect will hydrogen bonding have on the solubility of each compound in water? In hexane?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.