Why is benzoic acid used as a solvent when making up the glucose stock standard solution?

Q: In caffeine recrystallization, explain how recrystallization was performed and how pure caffeine was…

A:

Q: What volume of aztreonam (50 mg/ml) must be added to 500 ml of Mueller-Hinton broth to yield a…

A: Formula used: C1V1=C2V2

Q: Will recrystallization work as a purification technique on all samples? If the sample contained more…

A: Recrystallization techniques works only on the solid samples which is used to purify them. This…

Q: 4. Why is important to allow the saturated solution to cool down slowly during the…

A: Recrystallization is purification method. Solid substances are purified using Recrystallization…

Q: Why is water not a good recrystallization solvent for sodium benzoate? a. Sodium benzoate is…

A: Water is not a good recrystallization solvent for sodium benzoate.

Q: Explain and elaborat

A: Organic compounds when obtained from their natural sources or prepared in the laboratary are…

Q: 8. Why should you boil the sample solution right before reaching the end point?

A:

Q: is water a good solvent for recrystallization for acetanilide based on the image?

A: The answer is as follows:

Q: If you were to use a mixture of methylene chlorine and ethyl acetate to elute the column (rather…

A: In column chromatography, the non-polar molecule elutes first then the polar molecule because the…

Q: Why is steam distillation and not fraction distillation used to extract limonene from citrus peels.

A: Steam distillation: It is a purifying technique which includes distilling of water with volatile and…

Q: Why is methanol chosen as the solvent for recrystallization? What would happen if the student uses…

A: Most of the organic compound is dissolved in alcohol like methanol and ethanol . methanol is easy to…

Q: How might cyclohexane give a false positive when choosing a solvent for recrystallization?

A: Melting point of cyclohexane = 6.47 oC   Cyclohexane is not soluble in solvent at high temperature,…

Q: What are the analyses or instruments that are used to verify or confirm if the extracted substance…

A: Caffeine is a naturally occurring molecule found in various plants worldwide, and found in beverages…

Q: A group was given the responsibility of performing a recrystallization experiment in their…

A: Solution- Data given- compounds A and B. Solubility in g/100 mL solvent.

Q: hich statement about liquid-liquid extraction is not correct? *       A- A solvent must be available…

A: Answer -The correct option is (E) All these statements are correct.   Explanation - According to the…

Q: 25. In the paper chromatography experiment on food dyes, salt water was used as the A. mobile phase…

A: Paper chromatography is a method used to separate colored substances or chemicals.

Q: An analyst wanted to separate an  essential oil which is partially immiscible in water and a boiling…

A: to separate an essential oil which is partially immiscible in water and a boiling point higher than…

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: What would the gc chromatogram look like when 6.65 g NaBr, 3.78 g NaCl, 7.5 mL of DI water and 5 mL…

A: When NaBr,NaCl and 1-butanol are added together, the halides Reacted with butanol.…

Q: Murexide

A: Although caffeine present in natural organic matter is less soluble in polar solvents such as water…

Q: Why is important to allow the saturated solution to cool down slowly during the recrystallization?

A: Recrystallization is most useful purification technique. It is used for purify solid compounds.

Q: Suggest methods (aside from recrystallization) that can increase the purity of aspirin in the final…

A: The question is based on the concept of qualitative aspects of the experimental chemistry. we have…

Q: What was the solvent used in the preparation of the standard stock solutions? Water Methanol Mobile…

A: methanol

Q: The reagent that is used in the preparation the sample and does not contain the analyte is called

A: The reagent blank is a solution that contains all the same components as in sample solution but no…

Q: In general describe how a mixed solvent recrystalization works.

A: To do a mixed solvent crystallization, dissolve the solid to be crystallized in the smallest amount…

Q: Why are hexane, cyclohexane, and toluene soluble in ligroin?

A: Ligroin is a volatile organic solvent obtained from petroleum.  "Like dissolves like" is the thumb…

Q: Explain how these terms relate to ternay phase diagram Raffinate Solute Carrier Extract

A: Extraction is the process which is used to separate the components from the mixture. It is an…

Q: What properties does recrystallization rely on to be an effective method of purification? A) The…

A: Explanation :- A recrystallization solvent should not dissolve the substance to be purified at room…

Q: When is a PTFE buret used? _________________________________________________________ _…

A: PTFE: Polytetrafluoroethylene is a material from which stopcock is made and fitted into the glass…

Q: Distillation Curve 110 100 90 80 70 60 50 40 20 40 60 100 120 Volume (drops) 13. Based from the…

A: Distillation is a technique in which the mixture of liquid can be separated.

Q: What is another factor that can influence fractional distillation’s success other than the number of…

A: Distillation process involving conversion of liquid into vapours that subsequently condensed back to…

Q: How much of the suspending agent is needed to prepare a 60-mL preparation of Aluminum hydroxide gel…

A:

Q: How to know if substances (cinnamic acid and urea) are pure based on their melting range?

A: The melting point of a pure substance is always higher and has a smaller range than the melting…

Q: While determining the pressure during the Dumas experiment, if the barometric pressure reported were…

A: Given: The barometric pressure reported was lower than the actual vapour pressure in the Dumas…

Q: for effective  purification by recrystalization while avoiding performing a hot gravity filtration,…

A: Recrystallization is used to purify a sample.

Q: In glucose estimation using Benedict's Reagent, justify the necessity of continuously heating the…

A:

Q: Discuss if peroxide value is sufficient for measuring oil rancidity.

A: Answer - Rancidity - Rancidity, condition produced by aerial oxidation of unsaturated fat present in…

Q: Explain through a laboratory experiment: How is recrystallization of Acetone possible? Can it or how…

A: Recrystallization of acetone is almost not possible.

Q: 2. Is it possible to purify a compound by recrystallization using a mixture of solvents? Why or why…

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Q: How do we keep relative supersaturation low by controlling solute concentration?

A: ANSWER:-Option-3 is correct. 3.Concentration should be lower.

Q: In the isolation of caffeine from coffee experiment, the dichloromethane solution was washed with…

A: The reason for dichloromethane solution was washed with strong base in the isolation of caffeine.

Q: Compare the simple distillation of pure hexane and binary mixture of hexane and toluene to that of a…

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Q: What type of chromatogtaphy (RPLC, NPLC, HILIC, SEC, IEX) could be used for analyzing monosodium…

A: The answer is attached below-

Q: What are the answers for these questions? 1.Why is it necessary that the oil bath/water bath is…

A: Since you have posted a question with multiple subparts, we will solve the first three subparts for…

Q: Why is the glucose assay one of the most common analytical test performed in clinical chemistry.

A: Blood Glucose measurement is one of the commonly performed test . It is one of the longest…

Q: A compound has a distribution coefficient of 14 between water and diethylether. If 350 mg are…

A: Given the distribution coefficient between water and diethyl ether, K = 14 Here the organic phase is…

Q: Based on your observations during our experiment, would water make a suitable solvent for the…

A: In the water, the solubility of fluoride ion is much higher than the solubility of benzoic acid. So,…

Q: Compare simple and fractional distillation for the separation of HEXANE and TOLUENE

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Q: Identification Complete each statement. Write your answer at the end of each question. 92. To…

A:

Micelles and Biological Membrane

Micelles are the type of lipid molecules that organize themselves in spherical shape in aqueous solutions. The production of the micelle is a reply to the amphipathic behavior of fatty acids. It means that they consist of both hydrophobic regions and hydrophilic regions. In micelles, polar head groups (hydrophilic groups) produce an outer layer associated with water whereas nonpolar tails (hydrophobic groups) are organized in the interior.