Q: In caffeine recrystallization, explain how recrystallization was performed and how pure caffeine was…
A:
Q: What is the purpose of the wash with water using separatory finnel? Bicarbonate?
A: The aqueous solution of the sodium bicarbonate having formula NaHCO3 and sodium carbonate having…
Q: methyl alcohol and ethyl alcohol are poor extraction solvent. why?
A: Liquid–liquid extraction, also known as solvent extraction and partitioning, is a method to separate…
Q: briefly explain how a soap can be used to increase the solubility of methylamine in water
A: Soap is the sodium salt of fatty acid. Soap is produced by the saponification (basic hydrolysis) of…
Q: 4. Why do we have to wash the ether layer using 1 N HCl during the workup?
A: Answer is given below
Q: What is the melting point of crude and pure acetanilide?
A:
Q: Why ethylene glycol is not categorized under glycol liquid desiccant?
A: There are two types of Glycol.They are i-Ethylene Glycol ii-Propylene Glycol
Q: What is the procedure of ethanol distillation from yeast sugar wash?
A: Ethanol is manufactured from molasses by the fermentation process. Fermentation is the process of…
Q: Why is methanol chosen as the solvent for recrystallization? A. Because it can easily be boiled…
A: Solvent used in recrystallization should have below properties: At high temperatures, it should be…
Q: Comparison and Explanation Melting point: Magnesium chloride and oxalic acid Boiling point: Acetic…
A: Melting point is the temperature at which solid and liquid phases coexist in equilibrium. Boiling…
Q: why ethyl acetate is immiscible with water?
A: A solution consists of solute and solvent or a solution is a mixture of two or more components.…
Q: How will you purify benzoic acid that is contaminated with methyl orange? Give the step-by-step…
A: Both benzoic acid and methyl orange are sparingly soluble in water. But when we add strong base like…
Q: After dissolving our impure naphthalene in Methanol, the solution looks red. What could have…
A:
Q: Why is benzoic acid insoluble in sulfuric acid? Explain the concept
A: Given: Benzoic acid is insoluble in sulfuric acid.
Q: Why ethanol is added to the residue in the distillation flask Why is this important
A: liquid ethanol can be separated from a mixture of ethanol and water by fractional distillation. This…
Q: Explain briefly why washing the soap product with water is a very important step before using the…
A: Soaps are made from natural ingredients, such as plant oils (coconut, vegetable, palm, pine) or…
Q: Some de-icing compositions include dyes or colored compounds called indicators. Why?
A: The process of removing snow or ice from the surfaces is called de-icing. This can be done through…
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 property is used to determinyif an organic solvent is above or below the aqueous layer when…
A: In the process of extraction, it is important to know whether the aqueous layer is below or above…
Q: What are the sources of impurities of compounds? What is the different between benzyl alcohol and…
A: 1) sources of impurities reagents, solvents, raw materials ,method of process, storage…
Q: Diagram of Apparatus Draw or paste in a diagram of a simple distillation with a heating mantle, NOT…
A: Distillation is the process of separating components of a mixture based on different boiling points.…
Q: Filter paper should be moisten with water in preparation of spirit
A: False
Q: To purify benzil crystals and get rid of any leftover traces of benzoin, what would be the best…
A:
Q: Determine which solvent is best for distinguishing the following pairs of chemicals based on their…
A: and Both of the compounds are capable of forming hydrogen bonds with water, hence have appreciably…
Q: Why would concentrated HBr be an inappropriate catalyst for the dehydration of alcohols?
A: Alcohols upon dehydration to give alkenes It is an example for elimination reactions Generally…
Q: Why is aniline soluble in aqueous HCl?
A: The solubility of a compound depends on their polar or non-polar nature. It follows a simple rule…
Q: select
A: This question is related to recrystallization.
Q: What properties are necessary and desirable for a solvent in order that it is well suited for…
A: A number of solvents can be used for the recrystallization of an organic compound, which may be a…
Q: Why must some organic reactions occur in the absence of water? Describe how you can remove residual…
A: Since water is a polar solvent so it can interfere with the reacting species, which is unwanted and…
Q: why is distillation an ideal choice to purify cyclohexene from cyclohexanol instead of other…
A: Distillation is used to separate a mixture when the boiling point difference between the…
Q: Why should the sodium carbonate be dried prior to standardization? Answer briefly and own words
A: sodium carbonate is a common primery standard used in the titration of acids vs bases. sodium…
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: Are all organic solvents aprotic?
A: Aprotic means that the substance does not possess any O-H or N-H bond in its structure.Basically it…
Q: If we are recrystallizing a PURE compound, what will happen to the sample if we cool the solution…
A:
Q: Besides water, what is being removed from the ether layer when it is washed with a saturated NaCl…
A:
Q: Fill in the blanks: The ratio of the solubilities of an extract in two different solvents during…
A: This can be solved by using Nernst distribution law.
Q: surface contamination after cooling the acetanilide in the recrystallization experiment
A:
Q: Why is benzoic acid more soluble in ethanol than in water?
A: ability to dissolve solid, liquid and gases in solvent is known as Solubilty.
Q: How is lactic acid purified by distillation? Simple or Fractional Distillation?
A: Distillation is the process of separating the components or substances from a liquid mixture by…
Q: What is different about steam distillation
A:
Q: How do you obtain napthalene,napthol and benzoic acid from a sample using recrystallization
A: All three compounds dissolve in organic solvents (like dichloromethane or diethyl ether) better than…
Q: why is there are bubbles formed when aniline is added to nitrous acid?
A: The chemical formula of aniline is C6H5NH2 and that of nitrous acid is HNO2.
Q: I. Moisture and heat labile reagents are preferred for dry granulations. II. Dry granulation…
A: 2) I. Blaud's pills are used medication for patients sufferingfrom anemia. I. Ferrous carbonate is…
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: Select the best solvent (only one) for the recrystallization of each compound (benzoic acid,…
A: Interpretation- To select the best solvent (only one) for the recrystallization of each compound…
Why is it bad to put too much water as the solvent when recrystillizing benzoic acid?
Step by step
Solved in 2 steps
- why ethyl acetate is immiscible with water?What would be three solvents that you would select to determine with which to purify benzoic acid?Give a clear explanation answer Given A naphthalene sample is contaminated with a small amount of sodium chloride. Comment on each solvent: toluene, chloroform, and water, which is the best solvent for recrystallization for purifying the sample?
- Knowing that Pentane is a good solvent at room temperature for naphthalene, would it also bee a good recrystallizing solvent? Why or why not?What properties are necessary and desirable for a solvent in order that it is well suited for recrystallizing a particular organic compound?Assume that charcoal and sugar are the two main impurities in the sample of benzoic acid. Explain how you could perform recrystallization using water toremove each impurity.
