4. Compounds that have an effective depigmenting effect are… A. ascorbic acid B. kojac acid C. azelaic acid D. all answers are correct

Q: The melting point of salicylic acid is higher than that of acetylsalicylic acid. Explain why this is…

A: The compounds given are salicylic acid and acetylsalicylic acid.

Q: In a fractional distillation experiment it is important to wrap insulting tape and Al foil around…

A: Wrap the distillation column with an insulated like Aluminium foil insulation bill aloud the vapour…

Q: Which one answer does NOT represent a characteristic of a good recrystalli solvent? 1) Should not…

A: Recrystallization is the process of purification of an impure substance by the use of a suitable…

Q: A mixture is made up of low molecular weight carboxylic acid, alcohol and ester. What one step…

A: Extraction is the method to separate components from mixture

Q: Why is methanol chosen as the solvent for recrystallization? A. Because it can easily be boiled…

A: Solvent used in recrystallization should have below properties: At high temperatures, it should be…

Q: Explain and elaborat

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

Q: A) the possible methods to purify cyclohexene from cyclohexanol and other materials produced in the…

A: Purification of Cyclohexene from cyclohexanol  can be done via these following ways -  First one is…

Q: How can the Eugenol content be separated from the alkaline solution?

A: Eugenol also known as clove oil. This oil is extracted from cloves and is used to treat toothache,…

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: Why is it necessary to keep all materials dry in Grignard reactions?

A: The Grignard reactions are used for the alcohol synthesis, which involves the addition of…

Q: Acetone will give no reaction with sodium bisulfite. Yellow crystals are formed in the iodoform test…

A: Carbon centre in acetone is electrophilic and it can give nucleophilic addition reaction.

Q: Explain what will happen to the (i) yield and (ii) purity, of aspirin if the following steps were…

A: Modification in Step Yield Explanation Opting to filter the recrystallized product using only…

Q: 3. Rank these solvent systems from on that would cause a compound to elute from the column fastest…

A: Given : Mixture of solvents  To find : Solvent that elute the Compound fastest and slowest .…

Q: Assume that charcoal and sugar are the two main impurities in the sample of  benzoic acid. Explain…

A: Given is recrystallization of benxoic acid.

Q: When choosing a recrystallization solvent, what properties must be considered? a. Its boiling…

A: The solvent should boil in the range 50–120°C. Impurities should either be insoluble in the hot…

Q: 2. Please explain what is A and B in the separating funnel when using NaOH to extract…

A: Extraction is a separation technique use to separate any compound from mixture. Common extraction…

Q: Why is it not necessary to dry the Erlenmeyer flask between each trial?

A:

Q: Will a polar solvent, such as water, cause a difference in how the pigments are separated? Explain…

A: Polar solvents are those in which the dipoles exist. This dipole forms when the compound contains,…

Q: At what step during the recrystallization would a soluble impurity be removed

A: Recrystallization :  It is a method in which solids are purified on the basis of their different…

Q: By adding calcium bromide to the group reagent of the fifth analytical group, a ppt. is formed this…

A: Given statement is : By adding calcium bromide to the group reagent of the fifth analytical group, a…

Q: How can we use a known reaction to preform a presumption test

A: Presumption Test :-  Qualitative analysis that allows to identify, or confirm, the presence of a…

Q: why do you have to stir when adding sodium nitrite to a solution when forming a diazonium salt?

A:

Q: Why is it bad to put too much water as the solvent when recrystillizing benzoic acid?

A: A question based on purification, which is to be accomplished.

Q: What indication in the "test tube test" (procedural step 9) will be given if Na3PO4 is the limiting…

A: To explain what happens at step 9.

Q: 1 Explain the comparative reactivity and hazards of NABH. as compared to LIAIH. Also, compare the…

A: Lithium aluminium hydride and sodium borohydride are popular reducing agents.

Q: Why is benzoic acid more soluble in toulene han hexane

A: Liquids which mix together in all proportions  and form a single layer are called miscible liquids…

Q: (b) AgNO3 test : Red precipitate formed , which dissolved in dilute HNO3 BaCl2 test : Yellow…

A: In this question, we have to find out the correct answer of given problem by the help of the…

Q: (a) Name each compound. (b). If a mixture of these compounds was fractionally distilled, give the…

A: Since you have asked multiple question, we will solve the first question for you, i.e. question 5.…

Q: A. Type of Test B. POSITIVE RESULT C. SUBSTANCES THAT 1. lodoform Test A. white precipitate WILL…

A: Qualitative analysis of compounds:

Q: (a) Why is an ethanol/water mixture used as the solvent rather than just water?  (b) Why does the…

A: (a) Why is an ethanol/water mixture used as the solvent rather than just water?  (b) Why does the…

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 is an azeotropic mixture? Can they be separated using simple or fractional distillation? Can…

A: Azeotrope, in chemistry, a mixture of liquids that has a constant boiling point because the vapour…

Q: Why is concentrated hydrochloric acid used in the flame test and not any other concentrated acid?

A: Certain metals possess tendency to absorb radiations and get excited to greater energy states. Thus,…

Q: |CH,CH,l,Cu-Li THF solvent [+] DIBAL-H, cold THF solvent

A: These two reactions are quite efficient to provide ketone and aldehyde from their corresponding acid…

Q: (i) Name any fraction, which is obtained higher up the distillation column than gas oil, and give…

A: The answer is attached-:

Q: What is the purpose of including a melting point in a procedure? A) As a method of purification - We…

A: Answer (A) Option is correct.

Q: Give the equation for boiling point correction and explain the meaning of each variable. Why do we…

A: As we know Boiling point is the temperature at which a liquid start to boil.

Q: what is the role of methanol for extracting chlorophyll?   What molecular force holds your…

A: Chlorophyll is a fat soluble hydrophobic compound. Methanol is hydrophobic solvent. Methanol is a…

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: Compound A, B, C, D Chromic acid test (-) |(+) blue-green solution А, В С, D. Lucas test 2,4-DNPH…

A:

Q: What is the structural feature present in alkene and alkyne why they react with the baeyer's…

A: Structural feature for alkene and alkyne substrate : We know that, alkane is differ from alkene and…

Q: what is wittig reaction? explain with an example.

A: Wittig reaction:Witting reaction is a chemical reaction which is used to convert carbonyl compounds…

Q: Why is the percentage of acetic acid in date vinegar more than apple cider vinegar?

A: Both vinegars are produced by fermentation. in the formation of date vinegar, the sugar is converted…

Q: write the general reaction and mechanism of swern oxidation reaction .

A: below answer is given

Q: Write a full procedure to Recrystallize benzoic acid and Naphthalene.

A: Recrystallization is the process of the purification of solid substances. Any substance that needs…

Q: Discuss in an essay the three proofs for the identification of Unknown in the chemicals Test for…

A:

Q: What is the purpose of testing distilled water and laboratory ethanol in the testing of ethanol?…

A:

Q: for benzoic acid: a.) If a benzoic acid sample had colored impurities, the solvent to choose would…

A: Decolorizing carbon provide a large surface area to which large colored molecules may become…