Why is the washing of crystals on the filter paper not as effective a process of purification as crystallization?

Q: Why was gravity filtration used instead of evaporation to isolate the calcium carbonate?

A: Calcium Carbonate is white, odorless powder or colorless crystals. Practically insoluble in water.…

Q: Although we will not use a Claisen adapter in our apparatus, what quality of vacuum distillation…

A: Vacuum distillation is a kind of distillation process based on the differences in the boiling points…

Q: Give one lysis buffer that is commonly used for western blotting experiments and include its…

A: 1. Answer - The RIPA buffer (lysis buffer) is one of the most commonly used buffers in  used for…

Q: What effect does the presence of impurity have on the melting point? Can the amount of impurity be…

A: Colligative properties are those that depends on the amount of solute present in the solution. The…

Q: 1. What is the purpose of adding Na2SO4 to the dichloromethane layer prior to distillation 2.…

A: In liquid-liquid extraction, separation of compounds takes place on the basis of their relative…

Q: Prepare your solution and write a VERY brief description of how you did it. Make sure you mention…

A: Secondary standard solutions is a solution where the concentration of solute dissolved in it has not…

Q: In a distillation of a mixture of acetone (bp. 56°C and dichloromethane bp. 40°C), a fraction…

A: Percentage of acetone in  the fraction depends on distance of average temperature from the boiling…

Q: What is the effect of weighing a recrystallized organic solid which is not completely dried to the…

A: Percentage yield is calculated  by dividing actual yield to theoretical yield and multiplying it by…

Q: Which of the following would LOWER the purity of the distillate collected from the rubbing alcohol…

A:

Q: Why is catalytic dewaxing not considered as a separation process?

A: Since Catalytic dewaxing involves breaking and making bonds, so it is usually referred to as a…

Q: Why is the final product from recrystallization isolated by vacuum filtration and not by gravity…

A:

Q: How was the precipitate obtained after filtration? a. By drying the precipitate on the filter paper…

A: The precipitate is obtained by drying the precipitate on the filter paper using a desiccator.

Q: It is tempting to maximize the amount of product isolated by continuing the fractional distillation…

A: The solution is given below -

Q: why does the observed meltin point change over the course of distillation

A: Distillation is the process of heating of liquid until it boils then condensing and collecting the…

Q: What is the significance of obtaining a mixed melting point? What do you learn from a mixed melting…

A: When two substances melt together at the same temperature; then identification of particular…

Q: 1. What is the purpose of application of steam distillation method?

A: Applying basics concept of steam distillation purification method.

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: Three sample, X (neutral), Y (basic), and Z (acidic), were mixed and dissolved together in…

A: Dissolve the mixture in dichloromethane and separate the organic and aqueous layer using liquid…

Q: Briefly describe on how peptization may occur during washing process of pure compound

A: Peptisation is the process of converting a precipitate into colliodal particles by adding an…

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: Briefly discuss how to identify the unknown compound by using mixed melting point method.

A: Mixed melting point calculation is a method for the determination of the identity of the unknown…

Q: In a liquid - liquid extraction, what is preferable? Three extractions with a small volume or one…

A: Liquid-liquid extraction is also known as solvent extraction or solvent partitioning. In this…

Q: What effect would the incomplete drying of a sample (e.g., the incomplete removal of a…

A: The melting point will be lowered and broadened.

Q: Explain the function of using dichloromethane after the steam extraction of Eugenol. Also discuss if…

A: Answer - During the process, Eugenol is extracted from the distillate with dichloromethane and…

Q: What would happen if the Erlenmeyer flask containing the crude dba in EtOH undergoing…

A: As we know during recrystallisation we dissolve our product into suitable solvent such as here, dba…

Q: 4. What is the purpose of changing the eluting solvent from pentane to ether between the two…

A: "Since there are multiple questions and it is not mentioned that which one has to be solved so I am…

Q: At what step in the recrystallization process would a colored impurity be removed?

A:

Q: In liquid, extraction, why is it necessary to turn the separatory funnel upside down and to open the…

A: Liquid-liquid extraction is also called solvent extraction is a method of separating compound from…

Q: 1.What is the purpose of washing the recrystallized solid with solvent during the vacuum filtration…

A: A question based on purification, which is to be accomplished.

Q: Draw a FIVE STEP Schematic diagram of the procedure on how to separate pure crystals of CuSO4 , Alum…

A: given-  CuSO4 , Alum and Benzoic acid

Q: How is "Characterization and spectroscopic techniques for analyzing" used in a melting point…

A: Melting point is the temperature when a substance starts melting. The melting point of a compound is…

Q: Nitroethylene, H,C-CHNO, is a sensitive compound that must be prepared with great care. Atempted…

A:

Q: A student recrystallized some impure benzoic acid and isolated it by filtration. He scraped the…

A: Recrystallization can be defined as the process in which old arrangement of particles in the crystal…

Q: COMPARE the two diagrams: a. phase diagram of eutectic point between binary system of menthol and…

A: Eutectic Mixture : It is defined as a mixture of two or more components which usually do not…

Q: what observation can you make for the solutions after mixing them with the vortex?  a.The bromine…

A: Analytical chemistry is a branch of science in which we deal with reaction of organic, inorganic…

Q: What is the main drawback of using steam distillation in the isolation of volatile oils from its…

A: The process of separation or purification in which the components of a mixture are separated which…

Q: Identify one water-soluble impurity that could be removed by washing the recrystallized dulcin with…

A: Dulcin is an artificial sweetener that is nearly 200 times more sweet than sucrose.  Dulcin is…

Q: What are the benefits of using slightly more solvent than necessary when dissoving a compound for a…

A: Recrystallization is a process of purifying a solute when it is soluble in the solvent only on…

Q: 2) determine the identity of an unknown solid. Briefly explain why the experimental technique of…

A: The Temperature at which the solid state compound transform into liquid state without changing its…

Q: Draw a five-step Schematic diagram of the procedure on how to separate pure crystals of CuSO4 , Alum…

A: Answer -  CuSO4 - Copper(II) sulfate, also known as copper sulphate, are the inorganic compounds…

Q: Why does scratching the inside of the flask with a glass stirring rod initiate crystallization?

A: The process by which solidification of molecules or atoms into a highly structured form called…

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: Under what conditions can a good separation be achieved with a simple distillation?

A: Simple distillation is a method of separating two compounds from a mixture on the basis of their…

Q: If insoluble impurities, e.g., dust, tissue, filter paper, etc., were mixed with the sample, how…

A: Insoluble impurities  The term "insoluble impurities" refers to contaminants that settle or float on…

Q: 1. Why does the solid need to be finely ground and then tightly packed in a melting point capillary…

A: The temperature at which the solid melts and starts converting into liquid is called as melting…

Q: Based on the resulting chromatograms after visualization with iodine vapor, which between the…

A: A question based on purification, which is to be accomplished.