(i) Why is an increase in temperature observed on mixing chloroform and acetone?(ii) Why does sodium chloride solution freeze at a lower temperature than water?

Q: In caffeine recrystallization, explain how recrystallization was performed and how pure caffeine was…

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Q: What is the reason behind the portion-by-portion evaporation of DCM in the extraction of eugenol?

A: Answer - According to the question -  DCM  (dichloromethane ) help seperating the eugenol and  water…

Q: When performing a distillation, the boiling point is measured: below the side arm of the distilling…

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Q: What is the purpose of employing recrystallization in the synthesis of aspirin experiment? Explain…

A: Since you have posted a question with various sub-parts, we will solve three sub-parts for you. To…

Q: Why does methyl benzoate, which is water insoluble, dissolve in concentrated H,SO,?

A: Given : Methyl benzoate is insoluble in water but soluble in concentrated H2SO4.

Q: Diethylacetal can be detected by gas chromatography. How does this impurity arise in fermentation?

A: The fermentation product of sugar is ethanol.

Q: How many phases did you observe when the naphthalene and p-dichlorobenzene were dissolved? What does…

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Q: What specific impurities are removed by the ethanol and acetic acid in ethanol washes?  Explain

A: Ethanol washes means washing the end product with ethanol. This procedure removes the impurities…

Q: What are the analyses or instruments that are used to verify or confirm if the extracted substance…

A: Caffeine is a naturally occurring molecule found in various plants worldwide, and found in beverages…

Q: Impure 1,4-dimethoxybenzene was dissolved in methanol and then immediately  placed in an ice-water…

A: Some time a compound need to crystalline to get in the pure form.

Q: Dissolution is considered one of the mosto important quality control test performed on…

A: Qualitative analysis is a branch of chemistry that deals with the identification of elements present…

Q: Describe how a cholesteric liquid crystal phase differs from a nematic phase?

A: The cholesteric liquid crystal phase differs from a nematic phase, which has to be described below.

Q: In the reaction of the phenol nitration, a mixture of o-nitrophenol and p-nitrophenol is formed. The…

A: Boiling point of a substace depends on the forces present in between the molecules of that…

Q: What type of deviation is shown by a mixture of ethanol and acetone? What type of azeotrope is…

A: Azeotrope is a mixture of two liquids having the same composition and have constant boiling points.…

Q: Why should you use a minimum amount of water to rinse the conical vial while transferring the…

A: This is a process of the collection of the crude and pure acetaminophen crystals, that are formed by…

Q: Consider the crystallization of sulfanilamide from 95% ethyl alcohol. If impure sulfanilamide is…

A: Crystallization is a technique for purification in which a substance containing some impurities is…

Q: Describe the temperature-composition diagram. What did you observe with the temperature of the vapor…

A: Type of chart used to show conditions at which thermodynamically distinct phases occur and coexist…

Q: Define gelsication and Write the steps of “drying by sublimation” for heat labile products? and also…

A: Following are the appropriate answers of the given questions.

Q: When a solution of 1.00 g of X in 100 cm3 of water was shaken with 10 cm3 of ether, 0.80 g of X was…

A: Formula used w = W KD×VKD×V+ vn  Where KD = distribution coefficient V = Volume of water = 100 cm3 =…

Q: What are emulsions? Why do they form during extractions? How is their formation minimized?

A: Emulsion is defined as the dispersion of one liquid in another liquid which are not miscible or it…

Q: What is the effect of an insoluble impurity, such as charcoal, on the observed melting point of a…

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Q: . One gram of caffeine dissolves in 55 mL of water, 7 mL of Dichloromethane, 530 mL of diethyl…

A: volume of water = 55 mL/1000 = 0.055 L volume of dichloromethane = 7 ml = 0.007 L volume of…

Q: State the use of saturated sodium chloride in the purification of isoamyl acetate and how it acts?

A: Formation of isoamyl acetate can be done by  help of esterification method. In this process Acetic…

Q: An ethanol/water mixture forms an azeotropic mixture. Why is it not possible to obtain a pure…

A: Azeotropes are the liquid mixtures which boils at a constant T like a pure liquid. They possess the…

Q: Why is caffeine more soluble in Dichloromethane than in water?

A: Solubility rule is that like dissolves like. Polar molecule dissolved in polar solvent.

Q: What was the composition of the distillate in Fraction B which was collected in the middle of the…

A: Question 9) at middle of the distillation. we have 50 % of both ethanol and 1-butanol. both are…

Q: Suppose you have an organic sample X that is somewhat soluble in water, even though it issomewhat…

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Q: We want to extract terpenoids from an aqueous sample by continuous liquid-liquid extraction. Which…

A: The solution is given below -

Q: Why was n-octanol chosen as a surrogate for natural organic phases? Why not another solvent such as…

A: A question based on introduction to organic chemistry that is to be accomplished.

Q: (i) Name any fraction, which is obtained higher up the distillation column than gas oil, and give…

A: The answer is attached-:

Q: In the reaction of the phenol nitration, a mixture of o-nitrophenol and p-nitrophenol is formed. The…

A: Solution

Q: 2. What two techniques are used to facilitate the aspirin crystallization? 3. Why is it necessary to…

A: Since your question has multiple parts, we will solve first three parts for you. If you want…

Q: 1. How many phases did you observe when the naphthalene and p-dichlorobenzene were dissolved? What…

A:

Q: Why is benzoic acid used as a solvent when making up the glucose stock standard solution?

A: Benzoic acid s an aromatic carboxylic acid.  This is a crystalline colourless solid. Benzoic acid is…

Q: you answer and explain this? a. Explain in your own words how the concept of vapor pressures would…

A: Answer Steam Distillation. Steam distillation is a separation method that involves distilling water…

Q: Why is dilute ethanol used as a slovent for the assay of salicylic acid?

A: Here we  have to determine the reason of using dilute ethanol as a solvent for the assay of…

Q: What is the dominant intermolecular force that governs the solubility of 9-fluorenone in methylene…

A: Like dissolves like principal said that polar compounds including ionic compound should be more…

Q: During the crystallization of acetaminophen, why was the mixture cooled in an ice bath?

A: When a compound is prepared, it contains some impurities. So, to remove these impurities one has to…

Q: A chemist desires to dehydrate 1-octanol.  What is the expected product, and would a higher or…

A: When 1-Octanol is treated with c. H2SO4 at an elevated temperature (> 170°C) then 1-octene is…

Q: A pure white crystalline compound was found to melt at 131.5-132.0°C when taken on a melting point…

A: A question based on introduction to chemistry that is to be accomplished.

Q: In the isolation of caffeine from coffee experiment, the dichloromethane solution was washed with…

A: The reason for dichloromethane solution was washed with strong base in the isolation of caffeine.

Q: Please answer this NEATLY, COMPLETELY, and CORRECTLY for an UPVOTE. 1-butanol, 2-butanol, and…

A: "Like dissolves like" is the thumb rule for dissolution of solute in solvent. This means highly…

Q: What are the answers for these questions? 1.Why is it necessary that the oil bath/water bath is…

A: Since you have posted a question with multiple subparts, we will solve the first three subparts for…

Q: How would you interpret this difference depending on their molecular structure ?

A: inter molecular forces

Q: Freezing point of pure t-butanol (cooling curve)

A: As you heat a solid to its melting temperature, the average kinetic energy (KE) is increased. As you…

Q: Why is it dangerous to attempt a distillation in a completely closed system

A: Distillation : a process of separating mixture of compounds based on difference in their boiling…

Q: Why is benzophenone soluble in methanol and biphenyl insoluble in methanol?

A: Given that benzophenone is soluble in methanol and biphenyl is insoluble in methanol.Benzophenone is…

Q: In the reaction of the phenol nitration, a mixture of o-nitrophenol and p-nitrophenol is formed. The…

A: Nitration of Phenols is a reaction of Phenol with dil.HNO3 at low temperature(273K). In this…

Q: Ethyl alcohol and water in liquid form are also an azeotropic mixture. Why is that?

A: The liquid mixture that boil at constant temperature and composition in vapour phase is exactly…