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Q: Finally, examine the atomic spectrum below. Estimate the wavelength of each spectral line, then use…
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A: Note : Acid catalyzed rearrangements.
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Q: i have an unknown quantity of gas at a pressure of 10 atm a volume 15 liters and temperature of 35…
A: Given-> Pressure (P) = 10atm Volume (V) = 15 L Temperature (T) = 35°C = 35 + 273 = 308 K
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A: V1 = 32.4 L P1 = 1720 mmHg V2 = 33.1 L P2 = 1762 mmHg T2 = 303.4 K
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A: Weight of NaCl = 25.0 gm Weight of water = 675 gm
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Q: Directions: Given the AH° and AS°, Calculate the AG° values for the following reactions and indicate…
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In caffeine recrystallization, explain how recrystallization was performed and how pure caffeine was obtained.
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- 1) Outline the processes you would adopt to purity and test the purity of sodium benzoate, an active ingredient of most cosmetic products in the laboratory.What is the difference in the solubility of benzoic acid and sodium benzoate in water and explain which of them will be more soluble in chloroform.. One gram of caffeine dissolves in 55 mL of water, 7 mL of Dichloromethane, 530 mL of diethyl ether, and 100 mL of benzene. Which is the optimal solvent to extract caffeine from an aqueous solution? Why?
- Why is benzoic acid more soluble in ethanol than in water?A sample contains a mixture of t-butanol and n-butanol. What type of distillation, simple or fractional, would be best employed to separate the two liquids? Why?The solubility of compound B is 59 g per 100 mL in boiling methanol and 30 g per 100 g in cold methanol, while its solubility in water is 7.2 g per 100 mL at 95oC and 0.22 g per 100 mL at 20oC. What solvent would be better for recrystallization of the compound? Explain
- Why do two layers form when solutions containing water are added to the extracted dichloromethane (CH2CI-2) solution?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 student performs a crystallization on an impure sample of biphenyl. The sample weighs 0.5 g and contains about 5% impurity. Based on his knowledge of solubility, the student decides to use benzene as the solvent. After crystallization, the crystals are dried and the nal weight is found to be 0.02 g. Assume that all steps in the crystallization are performed correctly, there are no spills, and the student lost very little solid on any glassware or in any of the transfers. Why is the recovery so low?
- 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 ?Give a fundamental description of the recrystallization process. Explain why it is required and how it can be executed.True or false: Naphthalene is more soluble in dichloromethane than is sodium benzoate.