Q: What would likely happen if a hot saturated solution were filtered by vacuum filtration using a…
A:
Q: c) You decide to use ethanol in conjunction with another solvent to make a solvent pair. What two…
A: CRYSTALLIZATION: A process in which solid crystals are produced from other state of matter like…
Q: Why should the recrystallization solvent have a fairly low boiling point?
A:
Q: Which of the following solvent systems are not suitable for binary solvent recrystallization?
A: a) water and heptane
Q: In a fractional distillation experiment it is important to wrap insulting tape and Al foil around…
A: Wrap the distillation column with an insulated like Aluminium foil insulation bill aloud the vapour…
Q: Why should a piece of filter paper inside the developing chamber be moistened with the developing…
A:
Q: Imagine your original mixture had contained a component capable of sublimation, such as naphthalene.…
A:
Q: In the melting point determination, if the solud is impure, how will it affect the melting point?
A: There are basically 3 state of materials such as solid, liquid and gas. In solis atoms are tightly…
Q: Vaccum filtration is the major technique used in this experiment. The following step sequences are…
A: The vacuum filter may be described as the approach which is basically used to disparate the solid…
Q: Why is it important to heat the empty evaporating dish at the beginning of the lab procedure of…
A: The percentage of water in Copper (II) sulfate measured by dry crucible than only we get more…
Q: 4. The reflux set-up in the experiment allows prolonged heating of the liquid reactants for them to…
A: In organic chemistry experiment, reflux technique is used used to obtain the product in chemical…
Q: Why is the final product from recrystallization isolated by vacuum filtration and not by gravity…
A:
Q: How might cyclohexane give a false positive when choosing a solvent for recrystallization?
A: Melting point of cyclohexane = 6.47 oC Cyclohexane is not soluble in solvent at high temperature,…
Q: After the liquid-liquid extraction of caffeine, you are removing the dichloromethane solvent on the…
A: The rotary evaporator may be described as the physical efficient technique that is used to convert…
Q: How would the concentration be affected if the etched mark on the volumetric flask is missed and too…
A: The concentration of any substance (solute ) in solution is given by, => Concentratio of solute =…
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: What should be done if the percent recovery is greater than 100%? Should the recrystallization…
A: The maximum percent recovery one can get is 100%. If one is getting more than that it's means there…
Q: If the aspirin crystals were not completely dried before the melting point was determined, what…
A: Freezing point depression or melting point depression occurs when a solute (or impurity) is added to…
Q: Post-Lab Questions: 1. What restrictions are there on what volatile liquids could be used in this…
A: There are certain restrictions to use a volatile liquid in this experiment. 1. Volatile liquid must…
Q: A student doing this experiment had some problems with the procedure, as described below. Explain…
A: On reaction of magnesium and hydrochloric acid, magnesium chloride and hydrogen gas is produced. The…
Q: If insoluble impurities eg. dust, tissues, filter paper etc were mixed with the sample how will…
A: Melting Points:- The melting point of a substance is defined as the temperature at which it melts.…
Q: Why is it necessary to allow enough time for your samples to dry?
A: during the organic synthesis, product may contain the impurity due the presence of the solvent
Q: What gas equation is used in the Dumas method to determine Molecular weight of the volatile liquid?
A: Interpretation: We have to write the gas equation which is used in molecular weight determination of…
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: 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: 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: Why would it be possible to get less than 100% recovery for a recrystallization?
A: The question is based on the concept of recrystallization. recrystallization is a purification…
Q: What do the melting points of the 6 samples tell you about their relative purities?
A: Melting point is the temperature at which equilibrium exist between solid and liquid phases. The…
Q: Why is concentrated hydrochloric acid used in the flame test and not any other concentrated acid?
A: Certain metals possess tendency to absorb radiations and get excited to greater energy states. Thus,…
Q: If some t-butanol were lost between after it's weighed in before the first run, how would the…
A: It is given that some t-butanol was lost between after its weight in before the first run.
Q: How is the volume of analyte measured and transferred into the conical (Erlenmeyer) flask?
A: Conical or Erlenmeyer flask are containers that are made of glass and have a shape that resembles a…
Q: Why should the washing solvent be cold in the suction filtration step?
A: Suction filtration is the final step for separating the compound from the solution during the…
Q: Why must the spots be above the level of the development solvent in the developing chamber?
A: Given statement, The spots be above the level of the development solvent in the developing…
Q: What is the purpose of refluxing the reaction mixture for 45 minutes? Why not simply boil the…
A: A question based on analytical process that is to be accomplished.
Q: One of the components of nutmeg is an organic compound, Trimiristin, A. To extract this compound…
A: One of the components of nutmeg is an organic compound, Trimiristin, A. To extract this compound…
Q: Briefly explain why should the flask be stoppered after the addition of KI in the standardization of…
A: The standardization of thiosulfate involves the oxidation of sodium thiosulfate to form sodium…
Q: Which solvent is appropriate to use in the iodoform test? Select one: Dioxane Acetaldehyde…
A: The iodoform test is used to detect the compound that contains the carbonyl group and the structure…
Q: Why is it necessary to pulverize the sample in doing the experiment of melting point?
A: Pulverization: It is the process of grinding or crushing a solid substance in order to get a powder…
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: What do you think would happen to your recrystallization solution if you did not use a pre- heated…
A: Re-crystallization process is a process in which the compounds which are not soluble in cold solvent…
Q: for benzoic acid: a.) If a benzoic acid sample had colored impurities, the solvent to choose would…
A: Decolorizing carbon provide a large surface area to which large colored molecules may become…
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- What is the vapor pressure of water (torr) of each trialIf you did not completely dry the Erlenmeyer flask before weighing the result, how would that affect the final results? Be specific in your answer.A sample of naphthalene is contamined with a small amount of anthracene. The melting point would be about the sample as the pure sample higher and the range broader than the pure sample lower and the range more narrow than the pure sample lower and the range broader than the pure sample higher and the range more narrow than the pure sample
- 1. Cite one factor that affects percent yield during recrystalization. 2. Discuss the importance of solvent-solvent partition in separating mixtures.Column Chromatography of 9-Fluorenone Experiment Introduction: Column chromatography is an important chromatography method used to separate and purify organic compounds. Column chromatography is typically used to separate impurities and purify products from chemical reactions, including separating unused starting material from products. Column chromatography is very similar to Thin Layer Chromatography (TLC) because it relies on a solid stationary phase (absorbent) and liquid mobile phase (eluant) to separate organic compounds based on their different polarities. In column chromatography, the stationary phase is a solid absorbent, typically silica gel or alumina, with a liquid coating packed into a glass column. The stationary phase is typically very polar. An eluant (mobile phase) solvent travels down the column and the separation occurs as the organic compounds enter into equilibria with the stationary and mobile phases. The polarity of the eluant may be adjusted from non-polar…What effect would the incomplete drying of a sample (e.g., the incomplete removal of a recrystallization solvent) have on the melting point?
- Acetone and isopropyl alcohol are generally not suitable for use in extraction, but are frequently used as recrystallization solvents. Explain6. Why is it dangerous to attempt a distillation in a completely closed systemWhy is the glucose assay one of the most common analytical test performed in clinical chemistry.
- What is different about steam distillationDifferentiate simple and steam distillation. (minimum of 5 sentences)Which of these solvent systems would cause a compound to elute from the column fastest (a, b, or c)? (Circle the one correct answer.)a. hexanes b. 1:1 hexanes:etherc. 1:1 ethyl acetate:acetone?