What is the purpose of drying the remaining solid after extraction under a heat lamp?

Q: Explain the principle of working and operation of Dye Penetration Technique Inspection with neat…

A:

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: What substance is used to help dry your sample rapidly?

A: The substances that rapidly absorb moisture from the surrounding atmosphere or dry it out are called…

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: Need to find percent recovery of crude caffine and purified caffine

A: Given that -  Mass of Caffeine in tea bags = 550 mg  Mass of Crude Caffeine = 109 mg  Mass of…

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: Briefly explain why it is important to use crucible tongs when you transfer the heated crucible (b)…

A: A quantitative analysis where the amount of substance is  calculated present in the sample by…

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: Why should the solvent not be run off the top of the paper? . What color did you observe in the…

A: Q3)  In paper chromatography, the solvent should not be run off the top of the paper.

Q: After the drying step (with sodium sulfate), there was still water in the solution.  What should the…

A: Topic : use of drying agent (Ex - Sodium Sulfate)

Q: When finished performing a vacuum distillation it is important to?

A: Vaccum distillation is a type of distillation allows the purification of compounds not readily…

Q: What is the purpose of the bead inside the thoma diluting pipette?

A: There are two types of bead (glass bead): 1. Red in colour in RBC pipette 2. White bead in WBC…

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: What are the considerations for choosing the solvent in the extraction?

A: Given: Considerations for choosing the solvent in the extraction.

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: Why there is a need to soak crucible with 10% nitric acid for the preparation of dry ashing? Why…

A: In dry ashing, minerals are subjected to convert it into oxides, sulfates, phosphates, chloride and…

Q: What are the advantages and disadvantages of liquid-liquid extraction method?

A: Principal of liquid-liquid extraction method :

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: Which is not a drying agent? anhydride CaCl2 sodium bicarbonate sodium sulfate none • all

A: Drying agent are those which absorbs moisture from air.

Q: he used for the deterrnination of the fu uncti

A: This question is related to spectroscopy.

Q: look for at least three extraction methods for perfumery materials.

A: There are several methods which are used for extraction of the perfumery materials from different…

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: What happen to ink in the filter paper strip which is store in isopropyl alcohol for 15 minute

A: Given: To determine what happen to ink in the filter paper strip which is store in isopropyl alcohol…

Q: Why do you have to keep all the equipment hot when removing carbon in recrystallization?

A: Recrystallization is technique used to purify solid compounds.

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: What is the purpose of drying the organic layer with a drying agent like anhydrous magnesium…

A: In separation of organic compound we use two solvent

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: Before applying the eluent on the column, why is it important to drain the solvent to a level right…

A:

Q: What method was used in the experiment to determine the boiling point of a sample? Select one: A.…

A: Here I have justified the experiment to determine the boiling point of sample

Q: Divinyl benzene is used when preparing the resin to obtain: 1-3D Interlaced Synthesis 2- Increased…

A:

Q: 7) Describe how to prepare a dried sample fit for melting point analysis.

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Q: Why should you store the crucible plus sample in a desiccator after heating and before weighing?

A: A crucible is a ceramic container similar shallow cup that is used to heat substance. If the…

Q: Name the water purified above separating technique

A: WATER PURIFICATION The process of purifying water involves taking out unwanted chemicals, biological…

Q: What is the purpose of the Claisen adapter in the reflux setup? Select one: to prevent bumping of…

A:

Q: What are possible sources of loss in an extraction experiment?

A: Extraction is a kind of fundamental technique which is used to isolate one compound from a given…

Q: why should a small volume of the cold solvent be used for rinsing the pure crystal?…

A: Using a cold solvent, the impurities present in the surface of pure crystal is removed by rinsing…

Q: Write the Separation of heavy metals using solvent extraction technique.

A: Solvent extraction is an analytical method in which constituents are separated based on their…

Q: Discuss how sample concentration is determined using the standard addition method. What limitation…

A: Standard addition method includes the eliminate matrix effects that means it assess whether a sample…

Q: Why should the washing solvent be cold in the suction filtration step?

A: Suction filtration is the final step for separating the compound from the solution during the…

Q: What is the use of the glass rod in transferring liquid reagents?

A:

Q: After vacuum filtration why is it important to allow the product to sit out for a few days before…

A: The separation of solids from liquids by passing the mixture through a filter and where, on one…

Q: What is the purpose of refluxing the reaction mixture for 45 minutes? Why not simply boil the…

A: A question based on analytical process that is to be accomplished.

Q: Explain the fuctions of each part of the reflux set-up

A: Reflux setup consist of three parts -- 1) A heating system 2) a round flask 3) a condenser.  It is a…

Q: What is magnesium sulfate used for at the end of the extraction? How can it be removed?

A: Magnesium sulphate is a drying agent, 8t is used to remove the water from organic extract. Magnesium…

Q: Explain why it is needed to filter the solvent before introducing it to the HPLC system

A: Basically there are following two reasons for using filtration during HPLC sample preparation are…

Q: 1.what data must be available when HPLC method is passed on 2.why eluents should be degassed

A: 1.data needed for HPLC: HPLC is High performance liquid chromatography. Chromatography:  It is a…

Q: Why is it required to add drying agent like sodium sulphate to the organic layer which may contain…

A: In an organic solution, there are often traces of water present because water is slightly soluble in…

Q: Why should you leave the crucible cover ajar while heating the sample?

A: In chemistry it is needed to heat a hygroscopic ionic compound to get the water out, and it says to…