Why should you wash your crystals in ice cold solvent after recrystallization? a. Ice is polar, so will not dissolve your crystals. b. Cold solvent is better at dissolving molecules. c. Ice helps the recrystallization. d. Room temperature solvent will dissolve your crystals, lowering your yield.

Q: student has a mixture of two possible compounds. The student performs recrystallization to separate…

A: Given: Mixture of two compounds are separated by recrystallization. The compound separated by…

Q: Based on the graph, what is the estimated number of theoretical plates of the fractional…

A:

Q: hink about sugar and water as make up of tiny particles. explain what happens when you mix it. use…

A: Given : We have to explain what happens when sugar dissolves in water .

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Q: Explain the stages of the formation of crude oil and gas in a flow chart.

A: The stages of the formation of crude oil and gas

Q: why is it necessary to use decarbonated cola?

A: To do titration of cola we need decarbonated cola.

Q: What are the two processes involved in distillation?

A:

Q: What gas law is applied in distillation of ethanol?

A: Given process,     Distillation of ethanol (C2H5OH).

Q: Why is a boiling stone used when solvents are heated to boiling point?

A: Boiling stones are small pieces of black porous rock that are added to solvent or solution.

Q: How can you separate a mixture of sawdust and powdered salt? mix properly with water, filter, and…

A: Salt mixes with water and forms a homogeneous mixture. Sawdust does not mix with water. It is…

Q: A pure crystalline "compound A" has a melting point 105-107 °C. If this compound i mixed with a…

A: Melting point is the temperature at which  solid changes its state to liquid at atmospheric pressure…

Q: The presence of soluble impurities in a given substance A lowers the melting point of A because the…

A: The given statement is False as The presence of soluble impurities in a given substance A lowers the…

Q: Write few applications of fractional distillation

A: Fractional distillation is a type of distillation which involves the separation of miscible liquids.…

Q: What is a thin film?

A:

Q: Which of these is NOT a criteria for selecting a good solvent for recrystallization? (A) Solvent…

A: Recrystallization is a process to purify compounds. It is based on the solubility. The principle is…

Q: (i) Why is an increase in temperature observed on mixing chloroform and acetone?(ii) Why does sodium…

A: The energy is released during any chemical reaction when the products formed are more stable than…

Q: [ Select] SUPERSATURATED Question 25 SATURATED UNSATURATED An NaCl solution is SUPERSATURATED with…

A: Unsaturated Solution   When there presents less amount of solute than the maximum amount of solute…

Q: Which substance will evaporate faster when rubbed?

A: Answer The substances are acetone and alcohol.and rubbing the both,…

Q: Cleaning PDB from the test tube after the experiment could be a long and arduous process. Describe…

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Q: unsaturated solution

A: Solubility is the maximum amount of solute which can be dissolved in specific amount of solvent and…

Q: Describe the fractional distillation curve/graph

A: To describe the fractional distillation curve / graph.

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: Recrystallization and Melting Points Why do we perform recrystallization?

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Q: Suppose you are allowed to mix drain cleaner and battery acid, what type of solution would you…

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Q: How much water is required to raise the moisture content of 100 kg of a material from 30% to 75%

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Q: Select all the statements below that are correct about Recrystallization O By dissolving both…

A: Recrystallization is defined as a process in which grains of a crystal structure come in a new…

Q: When a melting point determination is performed in the lab, three temperatures are noted.  In order…

A: The temperature at which the solid phase of a substance completely changes to the liquid phase is…

Q: What hazards are involved in evaporating a solvent from a solution in a laboratory environment?

A: Solution is made up of two components: Solute and Solvent. Component which is present in major…

Q: Fill in the blanks: The two processes involved during distillation are and

A: Distillation is the process in which any liquid is firstly converted into vapour and then that…

Q: What would the effect on the purity of crystals if the hot solution was placed on an ice bath to…

A: Recrystallization uses the different solublity of solutes (often a solid) in a solvent (often a…

Q: option y in the purification of crystals. g the solution after mixing. ng the crystals stallization…

A: Allow the solution cool down as slowly as possible, this will improve purity.Recrystallization also…

Q: What is the importance of heat of combustion in the laboratory?

A: Hello. Since your question has multiple questions, we will solve the first question for you. If you…

Q: Which of the following is/are TRUE about simple distillation technique? a. It is used to separate…

A: Distillation is a technique that is used to separate mixture of liquids depending upon the boiling…

Q: Purpose of the boiling stones during the distillation process is: a. avoid the formation of bubbles…

A: Small pieces of black porous rock usually made of silicon carbide which are added to solution or…

Q: You are given an impure sample of fluorene. Your crystallization solvent choices are water, methyl…

A: Fluorene and toluene are quite non-polar, water is quite polar, and methyl alcohol is somewhere…

Q: What will be the observation of melting point of ice with salt compare to ice only.

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Q: A student has a mixture of two possible compounds. The student performs recrystallization to…

A: The given mixture has two compounds with Melting point of compound 1 - 204 oC Melting point of…

Q: recrystallization

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Q: Why do you think that the surrounding temperature of ice cubes is cold and has condensation? What…

A: The surrounding temperature of ice cubes is cold.

Q: In chem lab when creating aspirin, how does a melting point range for pure aspirin compound differ…

A: In chemical lab, we can prepared aspirin then it will compared with reference aspirin (pure aspirin…

Q: powders and granules dosage forms have faster dissolution rate than capsules and tablets  ,why?

A: Disintegration means break down of the tablet or capsules into granules which are again disintegrate…

Q: QUESTION 7 WHEN DO WE USE SIMPLE DISTILLATION AND WHEN DO WE USE FRACTIONAL DISTILLATION?

A: Distillation is the process of purifying the liquid. In this process, the liquid is converted into…

Q: The paints are applied onto the plaster when this is partially dry. What would be the result of…

A: The first and foremost pre-requisite before painting the wall is to allow the plaster to dry. Wet…

Q: When a distilled water is distilled is there any residue at the bottom part of the distillation…

A: Solutions- Distillation of water.

Q: Give some advantages of steam distillation over simple distillation.

A: Steam distillation is a process used for separating and purifying isolate temperature-sensitive…

Q: Describe why adding a solvent would either lower the vaper pressure of raise the boiling point.

A: For the solvent, the presence of the solute decreases its vapor pressure by dilution.This means in…