Which solvent would be the best choice for use as an extraction solvent in a separatory funnel with an aqueous solution of NaHCO3 followed by rotoevaporation? Hint: Consider the ability of the solvent to dissolve a wide range of substances, its miscibility with water, and its ability to evaporate the solvent easily by rotoevaporation. ethylene glycol
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Which solvent would be the best choice for use as an extraction solvent in a separatory funnel with an aqueous solution of NaHCO3 followed by rotoevaporation? Hint: Consider the ability of the solvent to dissolve a wide range of substances, its miscibility with water, and its ability to evaporate the solvent easily by rotoevaporation.
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- Table 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 ?A mixture of ethanol, benzaldehyde and KMnO4 is mixed together. Would you expect a precipitate to form based on the reactants functional groups?Dimethyl sulfoxide (DMSO) is a polar aprotic solvent that is frequently used for organic reactions. Rank the following potassium halide salts for increasing solubility in DMSO. KI > KBr > KCl KBr > KI > KCl KCl > KI > KBr KCl > KBr > KI None of these salts is soluble in DMSO.
- Consider the following information: Ksp(BasO4) = 1.1 x 10-10 Ksp(CasO4) = 4.9 x 10-5 Ksp(PbSO4) = 2.5 x 10-8 Ksp(Cd(OH)2) = 2.5 x 10-14 Ksp(Cr(OH)3) = 1.6 x 10-44 These compounds arranged in order of increasing aqueous solubility is a. PBSO4 < Cd(OH)2 < BaSO4 < Cr(OH)3 Ob. Cr(OH)3 < Cd(OH)2 < BasO4A reagent bottle contains 250 cm3 of 0,4 mol.dm–3 oxalic acid(C2O4H2) solution. Calculate the mass of pure oxalic acid thatmust be dissolved in this solution so that its new concentration is 0,6 mol.dm–3. Assume that the volume of the solution remainsconstantBriefly explain the principles involved in the separation of the components of a mixture by solvent extraction.2. You have a solution that contains 4.0g of oxalic acid dissolved in 100 mL of water. This solution is placed in a separatory funnel, and then 100 mL of diethyl ether is added to the separatory funnel and an extraction is performed. (Diethyl ether and water are immiscible solvents.) Use the following constants to calculate how much oxalic acid is in each solvent after the extraction. Solubility of oxalic acid in water = 9.5 g / 100 mL Solubility of oxalic acid in ether = 16.9 g/100 mLA chemist is asked to separate the components of a mixture composed of 1.00 g each of the two compounds shown below. The chemist has access to the following bases: 10% aqueous NaHCO3 and 10% aqueous NaOH. Which base and how many mLs of the base (i.e., the minimum amount) are needed to completely separate these compounds from each other by liquid-liquid extraction?(References) Which solvent, water, or hexane (Ce H4) would you choose to dissolve each of the following: Clear All CBI4 Sc(NO3)3 Water CH3 OH Нехane HCI C Hs CH3 (CH2)15 CH, OH Cengage Learning | Cengage Technical Support 回く2 1/1 point Barium sulfate is a contrast agent for X-ray scans that are most often associated with the gastrointestinal tract. Calculate the mass of BaSO4 that can dissolve in 100.0 mL of solution. The Ksp value for BaSO4 is 1.5x109 6.2x103g 8.1x10-5 g 9.1x10-4 g 1.2x10gWhy do two layers form when solutions containing water are added to the extracted dichloromethane (CH2CI-2) solution?5- A chemist is given a nonelectrolyte white powder for analysis. 38.7 g of this substance is dissolved in 100.0 g of water. It is determined that the resulting solution freezes at -4.0°C. Additionally, the elemental composition of the substance is identified and found to be 40.0% C, 6.7% H and 53.3 % O by mass. Find the molecular formula of this unknown white powder using these experimental evidences (Kş of water: 1.86°C/m, C: 12 g/mol, H: 1 g/mol, O: 16 g/mol).SEE MORE QUESTIONS