Q: Substance used as an adsorbent in the crystallization of acetanilide
A: Answer - Acetanilide - Acetanilide is used as an inhibitor of hydrogen peroxide decomposition and is…
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…
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A: Answer
Q: After preparing the column, why should the silica get never to dry?
A: Column chromatography is a technique used to spearate organic compounds from a mixture. It works…
Q: Brian forgot to close the end of his capillary tube when he was conducting the boiling point…
A: The correct option is 'a', a. Brian did a great job in making sure that the experiment worked. It is…
Q: For the liquid acetone, list all IMFs that have to be broken in order for it to mix with water
A: Solubility depends upon the polarity of the solvent. A polar solvent will be dissolved in the polar…
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…
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Q: If you do not heat your crucible strongly enough to remove all volatile impurities when you heat the…
A: The loss of water happening during the inital heating or during the second heating is not relevant
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: Your own words, explain in detail the process of Freeze-Drying and Freeze-Substitution in Reagents…
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Q: Why should solid diazonium salts never be separated from their mother liquor by filtration?
A: Why solid diazonium salts never be separated from their mother liquor by filtration - Let's discuss.
Q: Describe how the melting point range was determined
A: Melting point range is the range of temperature where substance actually melts .
Q: What is the use of Fisher-Johns apparatus, Gallenkamp apparatus, and automatic melting point…
A: To determine melting point the thermal analysis process is used. This analysis most frequently used…
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: Why is filtration of a gelatinous precipitate done while the solution is still hot?
A: The filtration of a gelatinous precipitate done while the solution is still hot.
Q: i) What two criteria should you ensure about your melting point sample before you fill the melting…
A: Since you have posted multiple questions, but we will solve first question for you. For remaining…
Q: Explain what the liquid-liquid extraction technique consists of
A: Liquid–liquid extraction also known as solvent extraction and partitioning.
Q: Re: recrystallization Before packing into a capillary tube, a solid substance has to be powdered.…
A: Watch glass
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…
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A: Type of chart used to show conditions at which thermodynamically distinct phases occur and coexist…
Q: Explain melting point determination as a characterization technique.
A:
Q: Q1:What effect would each of the following have on the observed melting point and melting point…
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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: Why is important to allow the saturated solution to cool down slowly during the recrystallization?
A: Recrystallization is most useful purification technique. It is used for purify solid compounds.
Q: does because compounds can either intera mobile phase (i.e., solvent). Draw a picture th Iphenol and…
A: As per rule, allowed to answer one question at a time and post the remaining in the next submission.
Q: 3. What are su melting point using a capillary and a Thiele tube containing 4. Is it possible for a…
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Q: What is the effect of an insoluble impurity, such as charcoal, on the observed melting point of a…
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Q: In the event that you were given a known chemical for the purpose of determining the melting point,…
A: The temperature at which the solid starts to melt and form a liquid is known as the melting point.
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Q: why should a small volume of the cold solvent be used for rinsing the pure crystal?…
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Q: What experimental procedure can be utilized for the sulphonation of Benzene?
A: Given What experimental procedure can be utilized for the sulphonation of Benzene?
Q: Explain in detail about the X-ray diffraction analytical method with suitable example.
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Q: What do you notice about the compounds under the melting point column that have negative values?
A: We are given the melting and boiling point of different compounds in the table.
Q: What are the different phase changes involved in the purification using sublimation experiment?
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Q: 5. For the same solid compound as the question above, if the 1 mm sample was heated at 60° per…
A: (4) Heating rate = Temperature/time Heating rate = 200 oC/1 oC/min Heating rate = 200 min (5) 1 mm…
Q: . What is the limitation of the sublimation laboratory technique? 2. When can sublination be applied…
A: Sublimation is the process in which solid is directly converted in to a gas phase.
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A: The unknown solution contains liquid and impurities.
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Q: If insoluble impurities, e.g., dust, tissue, filter paper, etc., were mixed with the sample, how…
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Q: Is the unknown compound considered pure? Choose... Explain your answer. Normal BIIIU X2 | X² | → fx…
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- 4. When performing a melting point on a solid compound using a melting point apparatus, two melting point determinations were made. One sample, which was 1 mm in height in the capillary, possessed a melting point of 200.0-200.5°C. The other sample was 25 mm in height. What would you expect the approximate melting point to be for this sample, assuming identical heating rates of 1°/min? (Hint: heat is applied from the bottom of the sample) (Give an actual numerical approximation!) 5. For the same solid compound as the question above, if the 1 mm sample was heated at 60° per minute on a melting point apparatus, what would you expect for an approximate melting point? (note that at this heating rate, the sample will melt rather quickly, but again give an actual numerical approximation)Filter paper is usually a poor material on which to powder a solid sample before introducing it into a capillary melting-point tube because small particles of paper may end up in the tube along with the sample. Why is this undesirable? and how might the presence of paper in the sample make the melting-point determination difficultIf acetone is miscible with both water and xylene, then why can’t all three form a clear single phase mixture?
- How much solid should be placed in a melting-point capillary tube?Which of the melting point capillaries in the picture below is filled to the proper level for taking a melting point on a MelTemp melting point apparatus? OB OC OA 12 01489 54. Suggest two possible experimental errors that may result in affecting the precise determination of the boiling point.
- What is the relationship between vapor pressure at a temperature and its melting point so that sublimation can occur? What are the different phase changes involved in the purification using sublimation experiment?Brian forgot to close the end of his capillary tube when he was conducting the boiling point determination experiment. He then decided to use a lighter to close the end, making sure that it does not touch the oil. Which of the following statements is true? a. Brian did a great job in making sure that the experiment worked. It is important to close the end of the capillary tube for accurate determination of the lower limit of the sample's boiling point. b. What Brian did is dangerous as oil is a flammable substance. He should have stopped the experiment then closed the tube first before continuing. c. It is not important to close the end of the tube. He could have just proceeded with the experiment or covered the end of the tube with tape since prolonged air contact might contaminate the sample. d. Brian could have covered the end of the capillary tube with his finger, since it is not as dangerous as using the lighter on a flammable substance such as oil.…Why is it best to cool a solution slowly as a solid crystallizes? impurities are more likely to crystallize as well when done quickly the solid obtained will have a higher purity when done quickly no solid will form when done quickly the solvent could start to boil again when done quickly
- BRIEFLY explain why steam distillation can be used to purify or isolate temperature-sensitive materials.Why does micelle formation take place when soap is added to water? Will a micelle be formed in other solvents such as ethanol also?Chemistry 5. You melt the substance and de-coloration occurs. Unfortunately, you weren’t paying attention and miss the melting point. Should you start over or re-melt it? Or both are options ‘okay’? 6. When measuring the melting point of a substance, it suddenly disappears. What has happened? Can you still measure the melting point? If so, how? 7. We should not re-use a sample in a capillary tube for melting point measurement. Why not? 8. It takes significant amount of time for the melting point apparatus to cool down before next measurement if your new sample has a lower melting point than your previous one. What can you do to reduce this time in between measurements when many samples of different melting points are used?