Q: what would be the implications if the volume reduction is skipped in the recrystallization
A: Recrystallization is a purification technique often employed in the labs. it is based on the…
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: Which compound from each pair would be collected first when purifying a mixture using column…
A: We know that
Q: What is the total amount of compound you can recover after the first recrystallization of 5g impure…
A: First we have to eliminate the impurity from the crude. Now the mixture is heated to make NBS…
Q: After extracting NaOH two times from ether, does the amount of precipitate after adding HCl in both…
A: The acid impurity is removed from the ether (organic layer) using NaOH which converts the insoluble…
Q: What is the purpose of adding HCI to the aqueous layer in this experiment? To remove the impurity To…
A:
Q: 2. Among the three solvents used in the separation of pigments in spinach, which produced the most…
A: Separation of pigments in spinach, by chromatographic method.
Q: The purity of triphenylmethanol is checked by TLC using 5% ethyl acetate/95% ligroin as the solvent.…
A: Given that, the polarity of the triphenylmethanol is chacked by TLC using 5% ethyl acetate/95%…
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: In the iodoform test, why is it necessary to add sodium hypochlorite?
A: Iodoform test is used to check the presence of carbonyl compounds with the structure R-CO-CH3 or…
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: What is the purpose of drying the remaining solid after extraction under a heat lamp?
A: The process, in which water and other solvent is evaporated from the solid-liquid mixture to form…
Q: For a Kjeldahl analysis: you weighed 0.0312 g unknown dried blood sample and digested it with…
A: This experiment uses Kjeldahl's method to estimate the amount of nitrogen in the given organic…
Q: What is the role of Sodium metal in Lassaigne's extraction?
A: For preparing Lassaigne's extraction, Chemical compound is fused in presence of sodium metal in…
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: 25. Extraction: benzoic acid- sodium sulfate mixture. Fill in the flow chart with the necessary…
A: This method of separation is based upon difference in solubilities of the components of the mixture.…
Q: 1. What type of precipitate is BaSO4? 2. Why is a filter paper preferred over a sintered glass…
A: 1) Barium sulphate is a white color precipitate , it is ionic in nature . when barium chloride is…
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: 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: In the test for ammonium (NH4+) ion, why should you take care that the litmus paper is not wet with…
A: ammonia gas can be detected by its pungent odour (it smells a lot like cat pee) and it will turn…
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 must be the primary standard be dried before use
A: A primary standard is a reference solution used to determine the unknown concentration of another…
Q: Briefly describe how you would make 500 mls of a 1X electrophoresis running buffer from a 15X stock…
A: Given: concentration of stock solution = 15 X And the concentration of final solution = 1 X And the…
Q: Before applying the eluent on the column, why is it important to drain the solvent to a level right…
A:
Q: Given 60.00 g of the compound in 60.00 mL water. Calculate amount extracted using multiple (2 x…
A: Concept- In a multiple extraction procedure, a quantity of solvent is used to extract one layer…
Q: a.What is the purpose of calibrating the pH probe? b.Why must you rinse the pH probe with distilled…
A: Please find your solution below : a. The pH probe should be calibrated regularly. This will adjust…
Q: Why do we use the LC (or HPLC) and GC in water analysis? What kind of analytes can be separated ?
A: Gas chromatography (GC) is the chromatographic technique that separates the constituents of a…
Q: Why is sodium chloride added before extraction the aqueous layer with DCM? How does magnesium…
A: DCM refers to dichloromethane and the molecular formula CH2Cl2 is used as a solvent that is…
Q: Draw an extraction flow chart for the extraction of a mixture of organic acid and phenol.
A: In this question we have been provided with a mixture of Organic acid and phenol, now we need to…
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: Mix 3 mL of ethyl alcohol, 1 mL of formic acid and 2 drops of conc. Sulfuric acid in the third test…
A: Formic acid is not a typical carboxylic acid; it is distinguished by its acid strength, its failure…
Q: What is the function of masking agent in EDTA titration?
A: Masking may be defined as the process in which a substance, without any physical separation of it…
Q: You have 100 mL of solvent available to do an extraction. Which will give a better separation? O A.…
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: 1. Basically, when is glass stoppered buret used? ______________________________…
A: Given, 1. Basically, when is glass stoppered buret used? ______________________________…
Q: What makes bromocresol green and phenolphthalein suitable for the double-indicator process?
A: An indicator is added to a solution based on whether it is acidic or basic and what pH is being…
Q: What are the mmoles of NaOH used to titrate the sprite in this experiment
A:
Q: What is the purpose of adding ammonium chloride in the assay?
A: Answer - Ammonium chloride has many purpose in chemistry. In general it can be used as a source of…
Q: You have 100 mL of solvent available to do an extraction. Which will give a better separation? a. 1…
A: The solvent extraction is more effective when the extraction is repeated with small amounts of…
Q: Will the melting point increase or decrease with the benzoic acid, 4-chloroanaline, and naphthalene…
A: During the extraction of benzoic acid, 4-chloroaniline and naphthalene, HCl is added at the first…
Q: Draw flow chart for the extraction of mixture containing a. Acid and Base
A: Given : mixture of an acid and base. To find : Draw a flow chart of acid base extraction. Solution…
Q: write a stp by step procedure for the preperation of 500 mL of 0.350 M LiNO3 solution.
A: Since molar mass of LiNO3 = 69 g/mol And moles of LiNO3 = molarity X volume of solution in L Since…
Q: Why might it be necessary to employ procedures such as the use dilution and in-use tests?
A: Step :1 A use dilution test is the another method for testing the efficacy of the disinfectant.In…
Q: How to get potassium hydroxide from potassium iodide? Give a detailed explanation of the methods…
A: Interpretation- Give the explanation of method used in the process of sepration that how to get…
Q: On my lab, involving extraction, it says “wash the organic layer with 1.0 mL of 1 M aqueous sodium…
A: From two immiscible substances, the desired product is extracted by liquid-liquid extraction…
Q: How to make solution for 1-Amino-2-naphthol-4-sulfonic acid reagent for silica determination?
A: Compound such as 1-Amino-2-naphthol-4-sulfonic acid is insoluble in water.
After the drying step (with sodium sulfate), there was still water in the solution. What should the TA have done to remove it? Be specific.
Trending now
This is a popular solution!
Step by step
Solved in 2 steps with 1 images
- Why is sodium chloride added before extraction the aqueous layer with DCM? How does magnesium sulfate break emulsions?What are some advantages of the membrane filter technique in the analysis of a water sample? Some disadvantages?What are the mmoles of NaOH used to titrate the sprite in this experiment?
- 1.What is the purpose of washing the recrystallized solid with solvent during the vacuum filtration step? Why should the solvent be cold?After acid-base extraction why is it important to wash organic layer at least once with pure water?Some procedures include the addition of sodium carbonate before liquid-liquid extraction. What is the purpose of this step?
- Can you recrystallize these two components with 95% ethanol? Is it possible? If so, make a flow chart with drawings showing the process of the recrystallization with 95% ethanol?1. Basically, when is glass stoppered buret used? ______________________________ ____________________________________________________________________ When is rubber stoppered buret used? ____________________________________ ________________________________________________________________________________________________________________________________________ When is a PTFE buret used? _________________________________________________________ _ _________________________________________________________________________________ 2. Describe the recommended method for the manipulation of a buret stopcock during titration. ________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ 3. Why is it necessary to completely fill the rubber tubing of the stopcock with the…At what step during the recrystallization would a soluble impurity be removed?