Q: Why would a solvent with a very high boiling point be inappropriate for a recrystallization?…
A: There are some ideal conditions in selecting the solvent for crystallization. Among which the…
Q: Write the principle behind the froth floatation process. What is the role of collectors in this…
A: Various processes are used for extraction of minerals. These minerals are very useful for…
Q: Which of these pictures show decolorization?
A: Substance appeared coloured due to presence of impurities . Example :brown sugar Brown sugar with…
Q: Why should the recrystallization solvent have a fairly low boiling point?
A:
Q: Why is the distillate treated with solid sodium chloride? (Check all that apply)
A: Distillate is always treated with the saturated sodium chloride because with the addition of salt…
Q: 1] What type of precipitate is BaSO4? [2] Why is filter paper preferred over a sintered glass…
A: Given: [1] What type of precipitate is BaSO4?[2] Why is filter paper preferred over a sintered glass…
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: Please help me this question, thank you! "Why is using a drying agent a necessary step?"
A: Drying agent is an agent that has the property to absorb excess water or the traces of water and…
Q: On recrystallization, if the volume reduction step was skipped, what would be the implications?
A: Recrystallization = A purification process, In this process we dissolve a impure solid into a…
Q: Differentiate simple and steam distillation. (minimum of 5 sentences)
A: Distillation is process which involve the conversion of a liquid into vapour that is condensed back…
Q: For either of these solvents explain why it would be a better choice as a recrystallization solvent…
A: Recrystallization is a technique used to purify compound. For recrystallization, dissolving both…
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: GUIDE QUESTIONS 1. What type of precipitate is BaSO4? 2. Why is a filter paper preferred over a…
A: As per our guidelines only three questions can be answered . Kindly post the remaining questions…
Q: When choosing a recrystallization solvent, what properties must be considered? a. Its boiling…
A: The solvent should boil in the range 50–120°C. Impurities should either be insoluble in the hot…
Q: While recrystallizing, what should you do if you have solid particles that don’t dissolve even after…
A: Recrystallization is the process by which non volatile organic solids are purified. In this method…
Q: Which of these could not be used in an extraction with water? Explain why you chose these…
A:
Q: How can we use a known reaction to preform a presumption test
A: Presumption Test :- Qualitative analysis that allows to identify, or confirm, the presence of a…
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: Why do we use more than one solvent in the cold extraction method?
A: In chemistry like dissolves like
Q: The glassware which is attached to the condenser to allow proper flow of distillate to the receiving…
A: Borosilicate
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: Occasionally you will have solid impurities “trash” in your heated recrystallization solvent. How do…
A: The process used for the purification of organic compounds which are solids at room temperature is…
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: You have completed your recrystallization process, but you did not get any crystals back after you…
A: Recrystallization is a process which is used to purify the compounds. The principle behind…
Q: After a recrystallization experiment, the crystals were dried very well. The melting point…
A: According to the question, after a recrystallization experiment, the crystals were dried very well.…
Q: In general describe how a mixed solvent recrystallization works.
A:
Q: Use a flow chart to show how you could separate a mixture of the following compounds using an…
A: Given a mixture of Compound 1 Compound 2
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 most distillations, the total volume of liquid obtained (distillate + residue) is not equal to…
A: In most distillations, the total volume of liquid obtained (distillate + residue) is not equal to…
Q: What is a spectrophotometer used for in a cobalt chloride solution analysis
A:
Q: Practie Use a flow chart to show how you could separate a mixture of the following compounds using…
A: Given that Tha separation mixture
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: for effective purification by recrystalization while avoiding performing a hot gravity filtration,…
A: Recrystallization is used to purify a sample.
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: Recrystallization and Melting Points Why do you need to heat a sample slowly when taking a melting…
A: Interpretation: We need to tell why we heat sample slowly during determination of melting point.
Q: In extraction process, the solution contains mixture of benzoic acid and sodium chloride and was…
A: Extraction process is a type of process in which when a reaction is completed, sometimes instead of…
Q: What is the aim of (solids:recrystallization and melting points) experiment?
A: What is the aim of (solids:recrystallization and melting points) experiment?
Q: While performing a crystallization, you obtain a light tan solution after dissolving your crude…
A: It is observed that a light tan solution is obtained and because of this, it is better to filter it…
Q: Briefly, discuss reflux and why it is commonly used in organic chemistry.
A: Here a term 'reflux' is given.Generally it is used in organic chemistry. We have to discuss about…
Q: It is important to pre-wet the filter paper before filtering your sample. Which statements about…
A: One important step in the procedure for filtration using filter paper is to pre-wet the filter paper…
Q: During melting point determination, what does melting point range means? How will you know if the…
A: The melting point of a solid substance is the temperature at which it changes from solid state to…
Q: In handling reagent, excess reagents should be
A: The quantity of the reagent once you taken from the reagent bottle, the excess of reagent after…
Q: How to get maximum % recovery from recrystallization and crude weight
A:
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: What properties should ideally be possessed by a recrystallization solvent?
A:
Q: All are properties of ideal solvent for recrystallization except: • Dissolves the sample when hot •…
A:
Q: Describe the procedure of how to collect and dry your newly recrystallized compound.
A: Recrystallization is the method that is used to purify the organic compounds. It involves the…
Q: When extracting an aqueous solution with an organic solvent and after agitation and settling, the…
A: Given information : When extracting an aqueous solution with an organic solvent and after agitation…
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…
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- What physical property determines which solvent sinks to the bottom when performing a liquid-liquid extraction? A. Refractive Index B. Solubility C. Density D. Boiling PointIn distillation 1. What is the reason for discouraging the formation of bubbles inside the condenser?2. What is a fractionating column?3. How fractional distillation works?4. What are azeotropes?At what step in the recrystallization process would a colored impurity be removed?
- You have completed your recrystallization process, but you did not get any crystals back after you cooled your solvent. Troubleshoot this situation. Briefly describe reasons why your crystals did not form, and describe how you will get them back.a. What are the qualities of a perfect solvent for recrystallization? b. How much solvent must be used in the recrystallization and why?Q2. What does “crude” product mean? Q3. What is the advantage of using Buchner filtration in filtering crystals? Q4. Briefly explain how scratching the wall of the glass flask can help formation of crystals. Q5. Briefly explain why crystals form as the solvent cools during recrystallization.
- In a recrystallisation, why are the newly formed crystals washed with cold solvent? -To wash off any impurities that have crystallized on the surface of the pure crystals. -To wash off the film of solvent which contains the impurities. -To cool down the crystals. -To slightly dissolve the crystals to give them a more rounded shape.What are two characteristics of good recrystallization solvent for given compound2) What’s the principle of extraction and recrystallization ? 2) What’s the best method to separate the compound? Why
- For either of these solvents explain why it would be a better choice as a recrystallization solvent than the other (water vs. ethanol).You will be completing the extraction of caffeine with dichloromethane and water. In which solvent will the caffeine be found after the layers are mixed, and is this the top or bottom layer? A. Dichloromethane - top layer B. Dichloromethane - bottom layer C. Water - top layer D. Water - bottom layerAt what step during the recrystallization would a soluble impurity be removed?