Q: Q1. Give three criteria for a good recrystallization solvent.
A: "Since you have asked multiple questions, I am solving the first one for you. If you need help with…
Q: does melting point determination remove impurites in crude protein?
A: Concept- Melting point is the temperature at which solid will convert into liquid. Because it is a…
Q: Enumerate three properties of a good extracting solvent in liquid-liquid extraction.
A: Liquid-liquid extraction is a technique of separation of desired constituents from a solution by the…
Q: True or false. A primary standard solid must be weighed accurately and diluted to an accurately…
A: Analytical chemistry.
Q: Screen. 7 With increasing polarity of solvent the
A: UV-Vis Spectroscopy can be defined as a technique that is used for measuring amount of light…
Q: A supporting electrolyte is usually added to the analyte solution to minimize solution…
A: 1. SOLUTION - The correct option is (a) minimize solution resistance According to the question -…
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: Arrange the following steps in the correct order. I. Prepare the separatory funnel. II. Mix and…
A: I. Prepare the separatory funnel. V III. Add the solution to be…
Q: what is the difference between liquid phase extraction and solid phase extraction
A: A question based on analytical process that is to be accomplished.
Q: Distinguish between electrostatic and electrophoretic coating
A:
Q: How can you vary the retention factor and selectivity factor?
A: Retention factor is a variable which indicates the time duration a component spends in the…
Q: Why is it important to pre-treat the solid before leaching?
A: It is important to pre-treat the solid before leaching because of Agglomeration ( this stage…
Q: What are the advantages and disadvantages of liquid-liquid extraction method?
A: Principal of liquid-liquid extraction method :
Q: In reverse phase chromatography which analyte will elute first, most polar or least polar?
A: In reverse phase chromatography, polar solvent is used as a mobile phase.
Q: Why is splitless injection used with purge and trap sample preparation?
A: The collection of all of the analyte from the unknown and to inject whole of the analyte into the…
Q: Post-lab Questions: does this say about the purity of your solid?
A: Answer of 1st question as per guidelines can only answer 1 if you want to ask more send them one by…
Q: High-pressure ATR is used to analyze very hard sample. True False
A: Attenuated total reflection (ATR) spectroscopy is an analysis technique that utilizes the surface of…
Q: Explain how solvent trapping and cold trapping work in splitless injection.
A: In Gas chromatography both split and splitless injection takes place. Split injection is used when…
Q: What kind of samples can be analyzed by AFM? What are the applications of AFM?
A: Atomic Force Microscopy (AFM) is a powerful technique that can image virtually any type of surface,…
Q: size exclusion chromatography
A: The size exclusion chromatography can be used to determine the quaternary structure of the proteins…
Q: Fill in the blanks: is applied when TLC will be used to isolate compounds. It uses a plate.
A: Thin layer chromatography is a technique used to isolate non volatile mixtures.
Q: Analysis of protein purity using two-dimensional electrophoresis could involve
A:
Q: Write the dispersed phase and dispersion medium of paints.
A: Colloidal solution contains two phase: dispersed phase and dispersion medium.
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: . What is the difference between temporary and permanent hardness?
A: Difference between temporary and permanent hardness :
Q: What parameters should be considered when choosing between distillation methods? Are there any…
A: Distillation is refining method of refining by alternating evaporation and condensation to remove…
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: After acid-base extraction why is it important to wash organic layer at least once with pure water?
A: A question based on quantitative analysis, which is to be accomplished.
Q: What would happen if the student did not stop the development before the solvent reached the top of…
A: The solvent would wash away the dye.
Q: crucible and precipitate are dry?
A: For precipitate are dry: Pour the methanol into the crucible ,swirl gently ,…
Q: Answer the question from picture, please
A: The ratio of the distance travelled by a substance (ds) to the distance travelled by the solvent…
Q: Importance of Water Sampler
A: To observe and measure how water quality changes over time.
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: Calculate the bulk density of a 110 cm3 soil sample that has a 25 percent water content (gravimetric…
A: Bulk density of any substance is defined as the mass of substance present per unit of volume…
Q: Please answer these questions for ion chromatography?
A: Solution Ion-exchange natural action (IEC) is an element of particle natural action that is a…
Q: Mode of separation that uses a polar stationary phase: IEX HILIC SEC NPLC
A:
Q: What roles do solvent, density and polarity play in liquid/liquid extraction
A: i. Solvent = In liquid - liquid extraction, the solvent which is needed to be extracted should not…
Q: The following conditions may not cause tailing EXCEPT a. Thick filter paper as the stationary phase…
A: Tailing in thin layer chromatography : Due to the using high concentration of solute or other…
Q: How to get maximum % recovery from recrystallization and crude weight
A:
Q: how does the intermolecular force of attraction lead to stain removal? state reference
A: Intermolecular forces are the type of forces operating in between the atoms or ions of different…
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: BRIEFLY explain why steam distillation can be used to purify or isolate temperature-sensitive…
A: A question based on analytical separation that is to be accomplished.
Q: Prepare a procedural flow chart that provides a simplified overview of the entire extraction…
A: The procedural flow chat of extraction process is explained in step 2.
Q: How do you weigh hydgroscopic samples?
A: Hydgroscopic samples contain moisture. Therefore it is measured in digital analytical balance.
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: Mention the relative sizes of hard gelatin capsule with their corresponding volume and fill weight…
A: HARD GELATIN CAPSULES: Hard gelatin capsules are modern invention which created a great impact in…
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.
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- During melting point determination, what does melting point range means? How will you know if the sample is pure or not?show solution plsA supporting electrolyte is usually added to the analyte solution to minimize solution resistance.minimize solution conductivity.make the analyte less soluble in solution.increase the scan rate.