Why should the spatula used for spooning solid chemicals from a reagent bottle be clean and dry?

Q: What are the problems encountered if tablets are under or excessively lubricated?

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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: In a warm environment, which restorative wax is recommended for surface restoration? a. opaque b.…

A: In a warm environment, which restorative wax is recommended for surface restoration?

Q: When using the centrifuge, what safety precautions should be followed?

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Q: When checking the melting point of your impure sample, what temperature should you set as the…

A: In the event that the inexact temperature at which your sample should melt is known, the sample can…

Q: What is the difference between the reaction of soap-water and synthetic detergent-water mixture to…

A: The composition of soaps is sodium stearate and composition of detergents is generally sodium…

Q: Describe the suspended solids on the filter paper and the residue left in the beakers after…

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Q: Chemistry how would i dilute a 50 mM stock to make a 5mM stock?

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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 difference between oil/water (O/W) type and water/oil (W/O) type emulsions? Give an…

A: Emulsions are the mixtures of 2 or more than 2 liquids that are generally immiscible. It is a type…

Q: Why should solid diazonium salts never be separated from their mother liquor by filtration?

A: Why solid diazonium salts never be separated from their mother liquor by filtration - Let's discuss.

Q: Which solvent should be used to wash the solid material collected from a filtration? Select one: The…

A: The process which is used for the separation of solids from liquids or gases using a medium like…

Q: For liquid water list all IMFs that have to be broken for it to mix with acetone

A: liquid water mix with acetone

Q: .Write any two safety measures he can follow while heating a solution in a test tube.

A: The safety measures can be follow while heating a solution in a test tube.

Q: What is a thin film?

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Q: Arrange the ff. into the correct order of recrystallization: a. prepare hot solution b. slow…

A: Concept - Recrystallization is a technique used to purify solid compounds. Solids tend to be more…

Q: This is the laboratory apparatus used for liquid-liquid extraction. Florence flask Volumetric flask…

A: For liquid liquid extraction is extraction of a particular compund from a solution with the help of…

Q: Benzillic Acid Lab Q3. Cold water and ethanol was used to wash/rinse the collected solid during…

A: The rinse is to wash off impurities that adhere to the surface of the tetraphenylcyclopentadienone…

Q: Why are polymers are crucial for making huge bubbles?

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Q: Whichof the following would not be a good solvent to use to extract a sample from water?   hexane…

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Q: The glassware which is attached to the condenser to allow proper flow of distillate to the receiving…

A: Borosilicate

Q: How does the analyzed vinegar sample conform with the FDA standards?

A: According to the Food and Drug Administration(FDA) standards, the minimum amount of acidity that a…

Q: of sodium chlorate? holes of sodium chlorate?

A: a) Sodium chlorate : NaClO3  Balanced equation,  2NaClO3(s) -----> 2NaCl(s) + 3O2(g)

Q: how solid and liquid chemicals should be handled?

A: How to handle solid and liquids chemical discription is given below.

Q: Why should the heating of ammonium chloride be done inside a fume cover/hood?

A: A chemical fume hood is used to protect researchers working in a chemical laboratory from the…

Q: Write the dispersed phase and dispersion medium of paints.

A: Colloidal solution contains two phase: dispersed phase and dispersion medium.

Q: Information about a Water Sampler

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

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Q: In a simple or fraction distillation, When would you prefer to use an air cooled condenser with no…

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Q: Relate physical pharmacy to pharmaceuical formulation

A: Physical pharmacy  forms the basis for design, manufacture, and distribution of drug products and…

Q: Why should the sodium carbonate be dried prior to standardization? Answer briefly and own words

A: sodium carbonate is a common primery standard used in the titration of acids vs bases. sodium…

Q: A sample of fried potatoes weighing 200 g was extracted using a volatile organic solvent. The…

A: The extracted solution contains cooking oil as the solute and volatile organic compound as the…

Q: What is the purpose of using cold solvent when washing your crystals after filtration

A: Interpretation- To explain the purpose of using cold solvent when washing your crystals after…

Q: Recrystallization and Melting Points Why do you need to heat a sample slowly when taking a melting…

A: Interpretation: We need to tell why we heat sample slowly during determination of melting point.

Q: What are the different phase changes involved in the purification using sublimation experiment?

A: Sublimation is a process in which solid is directly change into gaseous without changing in liquid…

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: What happen to the glowing wood splint when it is inserted inside the test tube?

A: Given,          Glowing wood splint is inserted into a test tube     Required,…

Q: 1. What are the two reactants used to synthesize the Aspirin? 2.  Why is water added to the…

A: Aspirin is synthesized through the esterification of salicylic acid by the acetic anhydride.The…

Q: 9. Just prior to drying an organic layer with a drying agent, you notice water droplets in the…

A: If water droplets are present in organic layer, so to remove it from organic layer you have to add…

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: Is water always used in steam distillation?

A: Organic compounds can be defined as compounds that contain hydrogen and carbon atoms.

Q: Coarse Dispersion What will be the results after you reconstitued a cefixime 60 ml a powder for…

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