Describe in detail the process of purification of a compound via crystallisation by gradual cooling. Your answer should include a description of how the process works and the solvents which can be used.
Q: Why would industry prefer to purify solids by sublimation or zone refining rather than…
A: The advantage of sublimation for purification process are i) Minimum amount of product is lost. ii)…
Q: It was found that solubility of benzoic acid in water at differont temjperatures Was according to…
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Q: calculated
A: Part 1: We know that molarity is defined as the number of moles of solute present in per liter of…
Q: Describe in words and by means of complete chemical equations, how a mixture of 1.25 g of benzoic…
A: Liquid- liquid extraction: This method is used to separate the mixture of two compounds according to…
Q: Under certain conditions, mixing furan with maleic anhydride in diethyl ether yields a crystalline…
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Q: 5. Arrange the following compounds in order of decreasing volatility: acetone, methanol,…
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Q: In benzene, dimerization occurs with benzene due to hydrogen bonding. In 110 g of benzene, 1.70g of…
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Q: :The water of crystallization in NaCl. 4H2O is
A: The water of crystallization are the number of water molecules attached to a single formula unit of…
Q: The solubility of water in diethyl ether has been reported to be 1.468 % by mass.' Assuming that…
A: The ratio of mass of solute to the mass of solution multiply by 100 is known as percent by mass.
Q: 2furoic adid isa white solid that follows this usual pattern as, 1 gram of 24uroic acid disolves in…
A: The experiment is based on the recrystallization of 2-furoic acid.
Q: Explain and elaborat
A: Organic compounds when obtained from their natural sources or prepared in the laboratary are…
Q: Does the commonly reported solubility of an inorganic compound in water pertain to large crystals or…
A: Solubility of any substance depends upon the physical and chemical properties of the solute and the…
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: Your own words, explain in detail the process of Freeze-Drying and Freeze-Substitution in Reagents…
A: Freeze- Drying Biomolecules can be stored for a long time using the well-established technique of…
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: You are employed as a coop student at the Drug and Alcohol Testing Association of Canada (DATAC)…
A: 2-Methyltetrahydrofuran (MeTHF) is a solvent produced from renewable raw materials by the…
Q: Draw (illustrate) a hypothetical phase diagram incorporating the following salient features: a.…
A: The diagrammatic representation that provides information about the physical parameters such as…
Q: why is it necessary to remove a stopper from a separatory funnel when the liquid is being drained…
A: We have to tellwhy is it necessary to remove a stopper from a separatory funnel when the liquid is…
Q: An unknown compound is found to contain only carbon and hydrogen. It is a liquid that boils at 49 C…
A: The empirical formula of unknown compound is calculated as,
Q: The Dumas tube containing the volatile liquid vapor is removed from the boiling water bath and…
A: Dumas tube is used to determine the molar mass of the unknown liquid.
Q: Describe the challenge of transporting oxygen and carbon dioxide in animals. In particular, discuss…
A: Heme has two capacities. It can tie gases, like oxygen, and transport them all through an organism.…
Q: When you are extracting an aqueous solution with an organic solvent, you are uncertain of which…
A: A question based on analytical separation that is to be accomplished.
Q: Criteria and constraints help determine which solutions will be applied when extracting materials…
A: Many methods are used to extract materials from pomace.
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: Why does it take a long time for a polymer (PVA) to dissolve in water when a similar mass of sugar…
A: A polymer will take long time to dissolve in water but compounds such as sugar (sucrose) or NaCl…
Q: Explain what type of carbonate polymorphs may be present in saw dust derived biochar prepared at 300…
A: Saw dust is also known as wood shaving. It is by product obtained from biochar.
Q: How does the process of preparing an aqueous solution of known concentration from a stock solution…
A: Solution stoichiometry is mainly based on the calculation of moles and volumes. These two values are…
Q: Describe how to prepare 100 mL of approximately 60% (w/v) NaOH from solid NaOH
A: Given :- %(w/v) of NaOH solution = 60% Volume of solution = 100 mL To describe :- Its…
Q: The distribution coefficient of hydrogen sulfide between benzene and water at 25 degrees Celsius is…
A: The solution of the question is given below:
Q: Which one is the most common method used for the purification of liquid mixtures?
A: The mixture of liquid can be separated by different methods into pure liquids.
Q: Phase Diagram for Solution Critical Point 217.75 (Critical pressure) Normal freening point 1.00 New…
A: normal boiling point is the temperature at which the vapour pressure is equal to 1 atm or 760 mmHg.…
Q: In what pressure range and in what temperature range must H2O exist in order for H2O1s2 to sublime…
A: The conversion of a solid directly into gas is called as sublimation. For example: Camphor and solid…
Q: You are employed as a coop student at the Drug and Alcohol Testing Association of Canada (DATAC)…
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Q: Based on the reported saturation points (in m/v %), which of the following compounds is the most…
A: The reported saturation points (in m/v %) are: Aluminum sulphate (36.4%) Barium acetate (75.0%)…
Q: The energy of the vacancy formation in the Ge crystal is about 2.0 eV/atom. Calculate the fractional…
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Q: Write the chemical reaction for the incongruent dissolution of spodumene.
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Q: Suggest the possible methods of separation of liquid–gas mixtures. Explain each method with an…
A: The method which is used for separation of liquid-gas mixtures is Distillation.
Q: In the reaction of the phenol nitration, a mixture of o-nitrophenol and p-nitrophenol is formed. The…
A: Solution
Q: ... متعد د الخيارات What is the volume of sulfuric acid H2S04 needed to prepare a dilute solution of…
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Q: Discuss the reactivity of organolithiums and why their standardisation is recommended?
A: organolithium compounds are hihgly reactive, they are more reactive compare to organomagnesium…
Q: Describe the preparation of 800 mL of 2 M HCl from the commercial reagent that is 37.5% HCl (%w/w)…
A: Volume of HCl =800 mL Molarity of HCl = 2 M Mass percent of HCl = 37.5 % Mass of Solution = 100 g…
Q: Determine the mole fraction of p-dichlorobenzene dissolved in 1.00L of cyclohexane that shifts the…
A: Here, we have to determine mole fraction and mass of p-dichlorobenzene (solute) dissolved in 1.00L…
Q: The addition of 100 g of compound A to 1 kg of benzene lowered the freezing point of the solvent by…
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Q: Write the equation of electrolytic dissociation of CsF in water. Draw the orientaion of water…
A: Equation for dissociation of CsF in water,Cs+ + F- ↔ CsF
Q: Explain the behavior of a cooled and remelted sample.
A: Given- A capillary shows a substantially higher melting point of 145°C. Repeated recrystallization…
Q: Discuss the solubility behaviour of polymers from a thermodynamic point of view. What is the…
A: thermodynamics of solubility of polymers :
Q: Describe the preparation of 400 mL of 6 F H;PO4 from the commercial solution which is 85% (w/w)…
A: Since you have asked multiple question, we will solve the first question for you.If you want any…
Q: Suggest any examples of PAT Tools used for Crystallisation of Small Molecule Drugs ( SMD )…
A: For crystallisation of small molecule drug (SMD) purification , generally use spectroscopic…
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- Phenol reacts with three equivalents of bromine in CCl4 (in the dark) to give a product of formula C6H3OBr3. When thisproduct is added to bromine water, a yellow solid of molecular formula C6H2OBr4 precipitates out of the solution. The IRspectrum of the yellow precipitate shows a strong absorption (much like that of a quinone) around 1680 cm-1. Proposestructures for the two productsOn being heated, the fullerene solvate C60 xCHBr3loses solvent in a two-step process. The final weightloss is 41%. Account for these data and determine x.You and a partner are asked to complete a lab entitled“Oxides of Ruthenium” that is scheduled to extend over twolab periods. The first lab, which is to be completed by yourpartner, is devoted to carrying out compositional analysis.In the second lab, you are to determine melting points. Upongoing to lab you find two unlabeled vials, one containinga soft yellow substance and the other a black powder. Youalso find the following notes in your partner’s notebook—Compound 1: 76.0% Ru and 24.0% O (by mass), Compound2: 61.2% Ru and 38.8% O (by mass). (a) What is the empiricalformula for Compound 1? (b) What is the empiricalformula for Compound 2? Upon determining the meltingpoints of these two compounds, you find that the yellowcompound melts at 25 °C, while the black powder does notmelt up to the maximum temperature of your apparatus,1200 °C. (c) What is the identity of the yellow compound?(d) What is the identity of the black compound? (e) Whichcompound is molecular? (f) Which compound is…
- 12.You needt o know the volume ofwaterinasmallswimmingpool,but,owingtothepool’sirregularshape, itisnotasimplemattertodetermineitsdimensionsandcalculatethevolume.Tosolvetheproblemyoustirin asolutionof adye(1.0gofmethyleneblue,C16H18ClN3S,in50.0mLofwater.After the dye has mixed with thewater,youtakeasampleofthewater.Usinganinstrumentsuchasaspectrophotometer,youdeterminethat theconcentrationofthedyeinthepoolis4.1x10 -8 M.Whatisthevolumeofwaterinthepool?A(n) ___________ property describes the behavior of asubstance when it reacts or combines with anothersubstance.Discuss the reactivity of organolithiums and why their standardisation is recommended?
- What is Chemical form and structure of phenazopyrdine? And common salts? specify the ionisable group? and the group thatimpart its physiochemical property?Explain the process of isolation and characterization of Enalapril in tablets for the commercial drug vasotec, by way of extraction of the solid phase and spectroscopy of infrared..you've been tasked to compound 30 grams of a 0.5% Zinc oxide ointment. you have a stock preparation of zinc oxide 5% strength to mix with petrolatum to dilute the ordered strength. In what (parts) ratio could this be compounded?
- Nitroethene, CH2CHNO?, is a very labile compound that must be prepared with care. Ifpurification of nitroethene s attempted, generally only small amounts are recovered, but theinner walls of the distillation apparatus are covered with a white film. Explain.3.Explainthethin-layerchromatographicpuritycheckprocedureforanalysisofanunknownorganic compound.The following is an experimental account of the preparation of compound B from Phenylamine. 2cm3 of phenylamine are dissolved in 10cm3 of 0.5M hydrochloric acid in a test tube and cooled in an ice bath. 5cm3 of 0.2M sodium nitrate solution cooled to about 5o are added to the solution above and shaken. A salt A, C6H5N2Cl is formed, collected and dried. 1g of salt A is dissolved in 10cm3 of water, cooled and added drop by drop to a cold solution of 0.3g phenol in 5cm3 of 0.1M sodium hydroxide solution. B is precipitated, filtered, dried and the melting point determined. B is further crystallized twice and the melting point taken each time and found to be constant. Questions: (i) Give the name and suggest the colour of the precipitate B. Hence explain why it is necessary to recrystallize B several times. (ii) Why was it necessary to obtain a constant melting point for B?