Q: Consider 15 mL of an aqueous solution containing 2.0 g of an organic solute. If the distribution…
A:
Q: 1. If the freezing point of the solution is recorded 0.2°C lower than the actual freezing point,…
A: Qus-1 If calculated freezing point lowering is less than actual one then calculated molality will…
Q: Which of the following is NOT correctly related to the parts of paper chromatography set-up? a.…
A: Paper chromatography is a method for separating dissolved substances from one another. The mobile…
Q: What are the different melting point apparatus that are available for routine analysis? Describe…
A: A melting point apparatus measures the melting Point of a given substance.
Q: Write functions and procedure of analysis of various volatile organic molecules by using Gas…
A: Given: Functions and procedure of analysis of various volatile organic molecules by using Gas…
Q: A student was careful to make and stir all of her standard solutions immediately before measuring…
A:
Q: why would you add 10 mL of concentrate to 490 mL of water if you were instructed to dilute the…
A: Given : To dilute the concentrate to 1 : 50. And total volume of solution to be made = 500 mL =…
Q: Write the dispersion medium and dispersed phase in milk.
A: Phase of solution in which colloidal particles are present termed as dispersed phase. The phase in…
Q: What are the dispersed phase and dispersion medium in milk?
A: Dispersed Phase: The phase or particles which are present in the form of colloidal particles is…
Q: Beer's law why does the procedure for measuring the concentration of a solution photometrically…
A: For the calibration of spectrophotometer blank solution is needed.
Q: Describe chromatography analysis, the two essential phases used in paper chromatography and provide…
A: Chromatography is an analytical technique used for the identification, separation and purification…
Q: Enumerate at least two important things to do to maximize yield when using vacuum filtration in the…
A: Aspirin is produced chemical synthesis from salicylic acid, through acetylation with acetic…
Q: 1. In this method, the mass of the analyte or a compound derived from the analyte is determined. 2.…
A: Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…
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: 50 g of salt was dissolved in 250 g of water. Find the mass fraction of salt in the extracted…
A: Mass fraction: It defined as WB = mb/m
Q: Question 5 In Gas Chromatography, there are no interactions between the solutes and the mobile…
A: True In the case of Gas Chromatography, the solute does not interact with the mobile phase because…
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: A mixture of 6.0 g acetinilide and 4.0 g aniline is to be separated using 100 mL of water as…
A: Amount of acetanilide in mixture before separation = 6.0 g Amount of aniline in mixture…
Q: What are the criteria for a good recrystallization solvent?
A: Recrystallization refers to the phenomenon where solid compounds are purified. In the…
Q: Which properties would be ideal in selecting the compound to be used as a primary standard for…
A: A primary standard solution of a compound is used for the standardization of a solution of another…
Q: Report Sheet: Determination of Molecular Weight Through Freezing Point Depression Analysis Part A:…
A: A solution is formed by mixing solute and a solvent that results in a homogenous substance. The…
Q: Predict the melting point of sample when you mix 50%benzoic acid with 50%of naphthalene? Explain…
A: It is given that 50% of benzoic acid and 50% of naphthalene are mixed and the boiling point of the…
Q: Which solvent system was used for the recrystallization of acetanilide? O acetone-water 1:2…
A: 1. We must have an basic idea about recrystalization. 2. Recrystalization needs a solvent. 3.…
Q: Explain why it is incorrect to collect data for temperatures above 100 C in terms of the solute to…
A: A question based on calibration method that is to be accomplished.
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: Hi! I need answers on these multiple-choices questions. The recap of the experiment can be seen…
A: With the help of eudiometer experiment, the mass of the metal used can be calculated on the basis of…
Q: A binary mixture of benzene and toluene containing 57.47 mol% benzene is continuously distilled. The…
A: Given, Binary distillation of benezene and toluene.
Q: 1. Did the sugar dissolve faster in the hot water or the cold water? 2. What would be another…
A: Sugar dissolves faster in hot water than in cold water. Because hot water has more energy. When…
Q: What are the functions and procedure of analysis of many volatile organic molecules by using Gas…
A: Gas chromatography (GC) is an analytical technique used to separate the chemical components of a…
Q: Which of the following could DECREASE the amount of the recovered crystals in the purification by…
A:
Q: Why would it be possible to get less than 100% recovery for a recrystallization?
A: The question is based on the concept of recrystallization. recrystallization is a purification…
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: True or False: In this experiment, freezing point depression should be positive when the freezing…
A: The given expression is, ∆Tf = f.p.pure solvent - f.p.solution Where, ∆Tf is the…
Q: 2. During heating, some solution of NaCl spattered out of the evaporating dish. How would this…
A: The question is based on the concept of experimental chemistry. We have to evaluate the impact of…
Q: In chromatography, the compound that is least soluble in the mobile phase a) Travels the furthest…
A: When a compound is dissolved in the mobile phase it is carried along the direction of flow, but when…
Q: In the preparation of 1,200 mL of 70% alcohol from stock absolute alcohol solution, what is the…
A: Here we will consider v/v % concentration, i.e. 70 % alcohol solution implies out of 100 mL solution…
Q: Isopropanol and water are miscible, meaning they can be combined in any ratio. So why were they…
A: 1. Isoprapanol and water are miscible due to formation of intermolecular hydrogen bonding. 2. But,…
Q: The distribution coefficient between methylene chloride and water for solute Y is 15. An amount of…
A: Distribution coefficient simply denotes how a compound is distributed in a mixture of two immiscible…
Q: In your own words, discuss the reason why stray light should be minimized. How does stray light…
A:
Q: Assume that you are provided with an 18 cm fractionating column having an HETP of 6 cm to distill a…
A: To determine the composition of first drop of distillate
Q: (c) What is the minimum distribution ratio that permits removal of 99% of a solute from 50.0 mL of…
A:
Q: Assuming an initially impure sample of acetaminophen, would you expect its melting point to change…
A: After recrystallization melting point of acetaminophen is decreased. We know that melting point is…
Q: 2. Is it possible to purify a compound by recrystallization using a mixture of solvents? Why or why…
A:
Q: A student forgot to add the mass of the unknown solute in trial 1 to the mass of the solute that was…
A: Mass = ( m1+m2 ) divided by 2
Q: To identify 1° alcohol from 2° alcohol and 2° alcohol from 3° alcohol giving Immiscible layer as the…
A:
Q: What properties should ideally be possessed by a recrystallization solvent?
A:
Q: 1. List the order of IMF's (lowest to highest) of the organic liquids you used in part 1. Explain…
A: IMF is intermolecular forces present in the molecules such as vanderwaal forces , hydrogen bonding,…
Q: Which of the following methods of preparing 0.0010M HCl solution from 1.0M stock HCl Solution will…
A: The task is to determine overall uncertainty while preparing 0.0010 M HCl solution from 1.0 M stock…
Why must the freezing point of a solvent be measured in an experiment rather than using the literature value?
Step by step
Solved in 2 steps
- How does the volume of a solvent affect the purity of the material in recrystallization?Isopropanol and water are miscible, meaning they can be combined in any ratio. So why were they immiscible in this experiment? In other words, why does the presence of sodium chloride reduce the solubility?Briefly describe the principles for separating the components of a mixture by solvent extraction.
- Why the Refractive Index of hexane and heptane from simple distillation closer to the refractive index of hexane and heptane from fractional distillation?Why should the recrystallization mixture be cooled in an ice bath prior to filtering?Consider 15 mL of an aqueous solution containing 2.0 g of an organic solute. If the distribution coefficient for the solute between ether and water is 20, calculate the percent of the compound that can be recovered with a single extraction with 13.3 mL of ether. to two significant figures.
- The density of an aqueous solution increases as solutes such as salts are added. What bearing might this have on predicting whether the aqueous solution will be on the top or on the bottom for an extraction?Why is important to allow the saturated solution to cool down slowly during the recrystallization?Why is benzoic acid used as a solvent when making up the glucose stock standard solution?
- In caffeine recrystallization, explain how recrystallization was performed and how pure caffeine was obtained.In the preparation of 1,200 mL of 70% alcohol from stock absolute alcohol solution, what is the volume of Diluent that must be added to the stock absolute alcohol?Which statement about liquid-liquid extraction is not correct? * A- A solvent must be available that is miscible with the solution containing the substance to be extracted. B- The solvent used for extraction must have a good ability to dissolve the desired substance. C- The denser solution forms the bottom layer in the extraction funnel. D- The extraction funnel must be vented during the extraction procedure to prevent excessive build-up of pressure inside the extraction funnel. E- All these statements are correct.