Q: Why should the recrystallization solvent have a fairly low boiling point?
A:
Q: арply. to determine a suitable solvent system for recrystallization to monitor the progress of a…
A:
Q: What is the benefit of using fluted filter paper instead of not folding it?
A: “Fluted “ filter paper (LEFT) is used when we wish to separate a liquid and a solid, keeping the…
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: The key to a successful HPLC procedure is good sample separation which is represented by a clean…
A: In this question, we have to choose the correct option from the given options.
Q: A melting "point analysis is a bit of a misnomer; how so? What do we measure when doing such an…
A: Melting point analysis helps in analyzing the purity of the compound.
Q: Answer ALL parts to this question (a) With the aid of a diagram describe the experimental set up of…
A: Answer- Gas chromatography- Gas chromatography is a term used to describe the group of analytical…
Q: Sometimes, the melting point range of a sample does not correspond exactly to that recorded in the…
A: Definition: The melting point of solid is defined as the temperature at which the solid exists in…
Q: During heating, some solution of NaCl splattered out of the evaporating dish. How would this affect…
A: Given: During heating, some solution of NaCl splattered out of the evaporating dish.
Q: Explain what the liquid-liquid extraction technique consists of
A: Liquid–liquid extraction also known as solvent extraction and partitioning.
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: - What is the ideal solvent behavior for crystallization? - You will probably hear me say…
A: Crystallization is defined as the process in which atoms in a given sample are arranged into a…
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: Is the separation 100% complete after evaporation process? Explain.
A: Evaporation is a process by which a compound changes its phase from liquid state to gaseous state…
Q: Why is it not necessary to dry the Erlenmeyer flask between each trial?
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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: 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: 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: Give at least five factors to consider when performing chromatography (paper, thin-layer, liquid,…
A: Chromatography is a technique that is used for the separation of components of a mixture. The…
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: What could have gone wrong in the separation and purification process to result in the disparity…
A: According to option A if benzoic acid and sand are weighted in wrong way then it is very possible…
Q: The reagent that is used in the preparation the sample and does not contain the analyte is called
A: The reagent blank is a solution that contains all the same components as in sample solution but no…
Q: When should we stop collecting distillate in ethanol-alcohol simple distillation process? Give me…
A: We are find out when to stop collecting distillate in ethanol distillation process.
Q: Why do we not need "spitless" injection to measure the toluene content of gasoline using gas…
A: Given : Splitless injection. To find : Reason for using Splitless injection in gas chromatography.…
Q: What is the structure and IUPAC name of atrazine? The herbicide simazine is more polar than…
A: The structure of atrazine is as follows: The IUPAC name of atrazine is…
Q: Crystal seeding
A: In this question we have to explain if there is no recrystallization due to the unsaturation of the…
Q: Based on your results, how does rate of crystal growth effect the purity of a recrystallized…
A: When the crystals of any compound are impure due to any reason. They can be recrystallized by the…
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: A melting "point" analysis is a bit of a misnomer: how so? What do we measure when doing such an…
A: By the term melting point, we mean that it is a fixed point of temperature where a substance or…
Q: In recrystallization, fluted filter paper is used instead of a regular cone because it minimizes its…
A: In recrystallization, an impure solid compound is mixed with hot solvent to form a saturated…
Q: Contrast the physical appearance of the crude material before the recrystallization and that of the…
A: A question based on re-crystallization, which 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: 4. When performing a melting point on a solid compound using a melting point apparatus, two melting…
A: Note - Since you have asked multiple questions, we will solve the first question for you. If you…
Q: Why is it important to cool slowly during recrystallization
A: recrystallization is a process in which we dissolve an impure crystal in a solvent at high…
Q: If a mixture is distilled rapidly, the separation of its compound is poorer than if the mixture is…
A: The correct answer is given below
Q: of the following may cause an increase in the calculated percent recovery of the recrystallized…
A:
Q: In the second paragraph you should define and describe the process of gas chromatography. In this…
A: A diluted sample in used in gas chromatography because this helps in establishing a proper…
Q: What might happen to your melting points if you do not cool the MelTemp between runs? The melting…
A: The temperature at which the solid becomes liquid is called melting point. Melting point is a…
Q: An overachieving student determines that their neutral liquid unknown contains impurities. Suggest…
A: The unknown solution contains liquid and impurities.
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: What properties should ideally be possessed by a recrystallization solvent?
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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: Compare simple and fractional distillation for the separation of HEXANE and TOLUENE
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Q: All are properties of ideal solvent for recrystallization except: • Dissolves the sample when hot •…
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Q: Give and explain two precautions in brine solution experiment.
A: Brine solution also known as Sodium Chloride Solution. While doing any experiment involving to brine…
Q: why do we have to order samples (from least concentrated -most concentrated) when measuring the…
A: A question based on qualitative analysis, which is to be accomplished.
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…
Step by step
Solved in 3 steps
- Compare the three main purification methods (recrystallization, distillation, and extraction) by stating whateach one is best for.Using the results from the solubility test table, what can be concluded about the structure/property of each polymer?what is the freezing method on separating alcohol to the mixture and its step by step process
- 2)which set up is fractional distillationA 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 sampleIn which option is the order showing whether the questions given below are true or false? () If the impurities are volatile, they can be separated according to the boiling point differences using the "Fractional Distillation" method. () If the liquid to be purified has a high boiling point, it should be done under low pressure so that the process can be carried out in a short time and does not decompose with high temperature. () Water vapor distillation is a technique used in the purification or separation of resinous substances that degrade at high temperatures. () In the crystallization process, the solubility of the substance to be purified in hot solvent should be very high, but it should not dissolve in cold and impurities should be at least moderately soluble in cold solvent. A. Right, Wrong, Right, WrongB.Wrong, Wrong, Right, RightC.Right, Wrong, Right, RightD. Wrong, Right, Right, WrongE. Wrong, Right, Right, Right
- What properties should an ideal solvent have to purify an organic compound by recrystallization effectively? (explain extensively) Thanks.Why is important to allow the saturated solution to cool down slowly during the recrystallization?Determine the following statements about the melting point determination and tell if it's TRUE or FALSE a. Melting point is used to assess the identity and purity of the recrystallized compound b. A recrystallized organic compound is pure if it has a melting point near to the theoretical value and has a large melting range c. Organic compounds have unique melting points d. The melting point is the temperature in which the first drop of liquid is observed up to which all the crystal liquifies