Write TRUE if the BOLD word/phrase makes the statement correct. Otherwise, write the correct WORD/PHRASE that will make the statement true. If there are two bold words/phrases in a number, write your answer for EACH of the bold words/phrases. 1. In the extraction of caffeine, NaOH was added to dry the collected organic layer. 2.  Purification of caffeine via sublimation was possible because it has a high sublimation point at a temperature above its melting point. 3. The E/Z designation is used to describe the orientation of identical groups in alkenes.

Q: In a thin layer chromatography (TLC) experiment, solute A traveled 20 mm while solute B traveled 30…

A: Here we are required to find which solute has greater affinity for silica gel.

Q: What is the function of a desiccant in a set-up of volatilization gravimetry?   To remove nitrogen…

A: Volatilization gravimetry is a technique used to separate the components of the mixture by heating…

Q: Cis-2- pentene and ethanol were added to an aqueous solution of bromine in two separate conical…

A: Alkenes react with a solution of bromine in CCl4 solution to form a dibromo alkane in this reaction…

Q: The percent of water in an unknown hydrated salt is to be determined by weighing a sample of the…

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Q: Will the molecular weight of the sample be more or less than the correct molecular weight if the…

A:

Q: Are Particles Visible? Can it be Filtered? Do Partices Settle? See Tyndall Effect? Msture Example…

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Q: This method of purification is applied when the purity has a lower vapor pressure than the purified…

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Q: What is the purpose of melting point analysis?     to determine the identity of an unknown…

A: Melting point of any substance is defined as the temperature at which the solid phase of the…

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: Which statement is valid when the multiple extraction and single extraction is compared.

A:

Q: Commercial bleach is usually 5% solution of hydrochloric acid. true or false

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Q: What is water hardness? Differentiate temporary from permanent water hardness

A:

Q: Which statement is NOT correct for an azeotropic mixture of two volatile liquids? a. Azeotropic…

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Q: Organic solids are best purified by a. recrystallization b. vacuum distillation c. fractional…

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Q: Why is NaOH(s) to be taken out and weighed only when you are ready to make measurements? Group of…

A: Concept: NaOH is hygroscopic in nature. It easily absorbs moisture from the air.

Q: e This diagram shows the apparatus used for distillation. What is the function of part X?

A: Distillation is one of the oldest and still most common methods for both the purification and the…

Q: In the reaction of 10.00 mL of FeCl3(aq) and 12.4 g of K2C2O4(aq), you calculate that 9.58 g of…

A: Solution :      Percentage yield provides the ratio of actual yield to the theoretical yield of the…

Q: Experiment: UV-Vis Spectrophotometry and Beer’s Law Absorption of Light of Dyes in Beverages…

A: Spectroscopy is basically a technique that study the interaction of matter with radiation  UV…

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Q: 22. Distillation is a process which consists in separating, by heat, the various elements…

A: The molecules given are,

Q: Which of the following are considered solution samples? Select all that apply.   A. natural waters…

A: A solution is a mixture.

Q: Draw an outline of the recrystallization process- Assume all types of Impurities(Soluble, Insoluble…

A: Recrystallization is defined as a technique which is used to purify the solid compounds.

Q: Why would buffered solution tests be compared to distilled water?

A:

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: Briefly explain why crystals form as the solvent cools during recrystallization.

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Q: Meisha mixes 100.0 g of potassium bromide with 100.0 mL of water at 20 degrees Celsius. Is this an…

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Q: A student prepared a compound. the melting point of the crude the product was 42 to 48 degree C.…

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A:

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Q: Students were tasked to conduct a recrystallization experiment to test the ability of the newly…

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

Q: Which is not required in recrystallization? a. solution is filtered at high temperature b.…

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Q: Why do you need to add sodium carbonate in the extraction process of tea bags?

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Q: . Answer Only Refer to the following mixtures: Mixture A: Liquid and solid mixture Mixture B. Liquid…

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Q: 9. Polar solvents tend to dissolve ionic and polar molecules while non-polar solvents tend to…

A: polar solutes dissolves in polar solvents and non polar solutes in non polar solvents thus we can…

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Q: If a small amount of impurity is present in a sample, what will be its effect on the melting point…

A: Types of impurities that can be present in the sample: Miscible impurity: Such impurity is soluble…

Q: What would be a good way to extract milkfat from your casein precipitate? (think: solvent polarity)

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Q: 1)  When comparing plain water to salt water, which will have higher surface tension?  Cite evidence…

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Q: Concentration (grams/kg H₂O) 1000 23. 900 800 700 600 500 400 300 200 100 0 Solubility Curve for…

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A: The solution of the given question is

Q: Indicate which of the two filtration techniques, gravity ( G ) or vacuum ( V ), is suitable for each…

A: Given operations are  a) Hot filtration b) Removal of decolourising carbon  c) Isolation of…

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.