Which of the satements below is/are limitations of Dumas Method? i. The Ideal condition is just an assumption for the vapor of the volatile sample ii. The sample must be a volatile liquid with a boiling point above 25°C and below 100°C using similar method iii. Possibility of having Impurities may not cause discrepancies of the result only i and i are the limitations only i is the limitation All are Method's limitation only i and ii are the limitations
Q: Silver chloride (AGCI) is a white-gray solid used to treat mercury positioning. A student vacuumed…
A: The correct option is:
Q: What percent of X can be extracted with 100 mL hexane? b) What will be the percent X remaining in…
A: The question is based on the concept of solvent extraction. we have to calculate amount extracted…
Q: How would you prepare 1ml of a 0.5wt% alginate hydrogel with 30mg/ml BSA from stock solutions of…
A: Hydrogel-A polymer network that can extent three-dimensionally. Moreover, these polymeric networks…
Q: Taylor was harvesting her beautiful, pure crystals via vacuum filtration from a methanol/water mixed…
A:
Q: Assume the data below was collected for two different sample solutions using the same experimental…
A:
Q: For a two-solvent recrystallization, you should have one solvent (solvent # 1) in which your desired…
A: In the process of crystallization first the solid compound is dissolved (In solvent 1) at boiling…
Q: 7. Would it work to take the melting point by using the same capillary tube for both trials? Solid…
A: This is because melting of a pure solid occurs at a constant temperature called melting point while…
Q: In paper chromatography, the stationary phase is made of ---------- and the mobile phae is made of…
A: A paper chromatography variant, two-dimensional chromatography involves using two solvents and…
Q: 1. Which balance would result in 0 degrees of freedom? Mixture 100 kg/h x=0.2 kg S/kg Xw=0.8 kg W/kg…
A: Here we have to find that which balance would result in zero degrees of freedom? The structure is…
Q: Using any chemical concept (like concepts in liquid liquid extraction, concepts in…
A: i will give the concept of using Caffeine in my daily routine. It can included in the section of "a…
Q: Sophia and her friend Nora have the same unknown solid. Sophia has progressed a little faster with…
A: The solute dissolved when the hot solution added then it allowed to room temperature slowly.
Q: Sublimation is preferred for small scale purification as compared to crystallization because there…
A:
Q: 1. Fill the blanks with the correct method of separation or process for the schematic diagram below.…
A: the solution is as follows:
Q: and
A: Given data set; Mass of empty flask = 351.74 g Mass of heated flask = 354.40 g Molar mass of acetone…
Q: Why acetone has les retention time and toluene has more. discus about polarity of 3 samples and…
A: Retention time is the time how long the compound is inside the Column .Depending on the polarity of…
Q: After the liquid-liquid extraction of caffeine, you are removing the dichloromethane solvent on the…
A: The rotary evaporator may be described as the physical efficient technique that is used to convert…
Q: 1. Shown below, a student spotted the three-component mixture onto a TLC plate and developed it…
A: a) Depending on the polarity the analytes will be separated on the TLC plate. More the polar…
Q: 50 mg of granular salt is briefly stirred into a glass container of 1/5 liter volume filled with…
A: To calculate dissolved phase concentration , we would first calculate mg of salt dissolved in water…
Q: This refers to a point wherein both liquid phases have the same composition. Hence, extraction is…
A: Answer: This question is based on the Liquid-liquid extraction where certain terms are used to…
Q: Does your melting point obtained for your product indicate that your sample is indeed benzoin or…
A: By matching the literature and obtained value one can consider the product. The literature value of…
Q: Which of the satements below is/are limitations of Dumas Method? The Ideal condition is just an…
A: The statements given are,
Q: 1.) Would recrystallization work if you more impurity than product and both were soluble in the…
A:
Q: Melting point: 122-123 experimental product melting point: 120 mass of starting material: 1.04…
A: A numerical problem based on yield, which is to be accomplished.
Q: Matt was heating his methanol solvent in an E. flask on a hot plate to use for recrystallization.…
A: Interpretation - To explain why the liquid exploded out of the flask on dropping a stick in the…
Q: Partition (or Distribution) Coefficient I best way to think about this is to start with a solute…
A: In the given problem we have to describe why the set of liquids used during the solvent extraction…
Q: Using your graph from the previous question and referring to the equation below, use the trendline…
A: The equation which you have found from the curve is, => Y = 1342.5 X where Y = Absorption And X…
Q: v- BTEXS are a class of volatile organic compounds that should be monitored and measured regularly…
A:
Q: Shown below, Baker spotted the three-component mixture onto a TLC plate and developed it using the…
A: A question based on analytical separations that is to be accomplished.
Q: profile-image Time remaining: 00 : 09 : 27 Chemistry A group was given the responsibility of…
A: Solutions- The solubility of three different solvents are given in g/100ml solvent
Q: the following are wrong, give your correct answer: 1. Cloud point value of lubricating oil fraction…
A: According to Q&A guidelines of Bartleby, I am allowed to answer only the first question out of…
Q: 7. The level of ethyl acetate is determined in colchicines by headspace gas Answer: 0.055. in water…
A: In the given problem the head space gas chromatography technique is used to determine the amount of…
Q: show how you are going to prepare your calibration standards.
A: WE need to prepare multiple solutions of 50 mL each using the 500 ppm stock solution such that the…
Q: Which of the satements below is/are limitations of Dumas Method? i. The Ideal condition is just an…
A:
Q: Paraxylene, styrene, toluene, and benzene are to be separated with the array of distillation columns…
A: Accordingto the given Diagram, where F, D, B, D1, B1, D2 and B2 are the molar flow rates in…
Q: This refers to a point wherein both liquid phases have the same composition. Hence, extraction is…
A: Plait Point is defined as the intersection of raffinate-phase and extract-phase boundary curves. At…
Q: If you place two spots of the same pure compound one vertically above the other on the plate (so…
A: Total height of plate = 10.0 cm The lower spot (A) = 1.0 cm from the bottom of the plate. The…
Q: Calculate the saturation concentration of oxygen (O,) and carbon dioxide (CO,) in a freshwater lake…
A:
Q: Please mark the wrong statement below. A. In case the liquid to be distilled contains non-volatile…
A: Distillation is the procedure employed in the purification and the basic identification of any type…
Q: 4. When performing a melting point on solid compound using a melting point apparatus, two melting…
A:
Q: Question 1 The feed to a distilaltion column contains 29.64 mol % benzene, 30.21 mol % toluene, and…
A:
Q: The phensuprin solid is first dissolved in ethyl acetate. One solid will be left over – what is it?…
A: Phensuprin is the mixture of aspirin or acetyl salicylic acid, acetanilide and sucrose.
Q: SOLVENT SYSTEM DISTANCE SPOTS TRAVELLED, cm 6.4 1.4 1.9 solvent ITSAY 4.1 5.3 6.5 0.7 1.7 2.5 3.0…
A:
Q: Which of the following consideration are applied when choosing a suitable recrystallization solvent?…
A: Recrystallization is the technique use to purify solids using specific solvent. Characteristics of a…
Q: A student recrystallized some impure benzoic acid and isolated it by filtration. He scraped the…
A: Recrystallization can be defined as the process in which old arrangement of particles in the crystal…
Q: Determination of melting point can also be done by heating melting point capillary to the…
A: The thiele tube melting point apparatus uses thermometer, a suitable liquid, thiele’s tube, burner…
Q: The goal of the recrystallization procedure is to obtain purified materlal with a maximized…
A: Recrystallization also named fractional crystallization. It is a method used for the purification of…
Q: You have available a brown material (C:N ratio 60, 45% carbon, bulk density 0.3g/cm3) and a green…
A: Here, C:N ratio is directly proportional to the percentage of C Therefore, 60/25 = 45%/x Therefore,…
Q: Which of the following could result in a loss in yield in a mixed solvent recrystallization? i. Use…
A:
Q: samples are introduced in a steady stream this introduces the sample in the form a of a fine spray…
A: A question based on tools in analytical chemistry that is to be accomplished.
Q: Please help me there are multiple parts, double check your answer as previous tutors got it wrong.
A: The given illustration is the procedures for the preparation of borax solution.
Q: This refers to a point wherein both liquid phases have the same composition. Hence, extraction is…
A: We have to tell the name of the point at which both liquid phase have the same composition. Hence,…
Q: 1- To purify the mobile phase gas in GC we commonly use: a) IEC b) adsorption c) partition d) traps…
A: Chromatography is a method of separation of a mixture into it's component. There are various types…
Q: The mobile phase taken in the TLC jar can be one of the following O a solvent or mixture of solvents…
A: Note : According to our guidelines we are supposed to answer only one question. Kindly repost other…
Trending now
This is a popular solution!
Step by step
Solved in 2 steps with 2 images
- a.) A 12 kmol liquid mixture with XSi = 0.8, xca = 0.2 at 1500oC was cooled to 1030oC. Determine the amount of liquid and pure solid Si that are in equilibrium with each other. b.) Suppose the mixture in (a) is cooled further to 900oC. how many kg of CaSi2 is formed? (Molar weights: Ca – 40 g/mol, Si – 28 g/mol) c.)At xSi = 0.694 and T = 1030oC, is the system solid, liquid, or both?A chart is prepared by plotting In Ksp versus 1/T, using data obtained by performing a lab experiment. Refer to the attached photo for reference on how to solve these equations. Particularly #5 should be useful: A linear fit of the data in the chart yields the equation y = (-5.0020x10^3)x+(2.100x10^1) with an R2 value of 0.9922. Determine the enthalpy (deltaH in kJ) associated with dissolving KNO3. Answer in scientific notation with appropriate sigfigs.a. What is the chemical formula of the solid represented by the vertical phase boundary passing through point g? (Hint: use mole fractions of A and B) b. Suppose we have a solid mixture represented by point k. How much of the solid in letter a is in equilibrium per kg of pure B? Given the Txy diagram below of a two-component (A and B) solid-liquid system.
- A solution of common salt in water is prepared by adding 50kg of salt to 200kg of water tomake a liquid density of 1250kg/m3. Calculate the concentration of salt in this solution as a: i) Weight(w/w)fraction (Ans: weight fraction 20%)3. Refer to the phase diagram depicted below: When 7 moles of A and 3 moles of B are mixed at 50oC which is then cooled to 10oC the sample turns into two liquid phases, phase I has mole fraction xB=0.14 (see diagram below). Find the phase II mole fraction xB, and then calculate the ratio of amount of substance in phase I to that in phase II using Lever rule. Please enter your answer as a number with two decimals. for example, if the ratio you calculated is 2:3, you enter as 0.67For a given liquid a plot of the lnP versus 1/T gives a straight line with a slope of -2829 K.What is the ΔHvap of this liquid? Your answer should be in kJ/mol and have 3 sig figs
- Polycarbonate, PC, is used for aircraft canopies. A batch of this polymer was found to fail prematurely when impacted by a 4 pound bird during qualification studies. You suspect that the problem is due to a molecular weight difference for this particular batch of polymer compared to previous batches. You decide to perform dilute solution viscosity studies to determine the Mol.wt. Assume density is 1.2g/cm3 What solvent would you use? Justify your answer Please answer very soon will give rating surelynon idealities in liquid mixtures 1) which non-ovalent force is responsible for most of the non-idealities in liquid mixtures? 2) if a binary liquid mixture exhibits a positive deviation from rault's law, what are the possible values of the acivity coefficients of the two components? 3)are the following mixtures expected to be non ideal or ideal? i) cyclohexane and cycloctane ii) isopropanol and water iii)chloroform and acetone iiii) benzene and tolueneDetermine the following from the Txy diagram of a two-component (A and B) solid-liquid system: Composition of the eutectic mixture Consider a mixture with overall B composition of 0.57. What is the ratio of the amount of solid containing 0.67 B and 0.33 A to the amount of the eutectic mixture at the eutectic temperature? What is the chemical formula of the solid represented by the vertical phase boundary passing through point g? (Hint: use mole fractions of A and B to answer this)
- Pressure was exerted with a piston on molten naphthalene at 95 °C. The vaporpressure of naphthalene when the applied pressure is 1.0 bar is 2.0 kPa. What is thevapor pressure when the pressure on the liquid is 15 MPa? The mass density ofnaphthalene at this temperature is 1.16 g cm-1.A liquid mixture of 50% mole n-butane and 50% mole n-pentane at 60oC and brought to a total pressure of 2600 mm Hg. At equilibrium, find the composition of both the liquid and vapor phases. What fraction of the original liquid was vaporized? If the mixture is heated further to 80°C what is the resulting pressure?A student prepared a solution by mixing two pure liquids with the same mass, chloroform (MW = 119.4 g/mol) and liquid A (MW = 65.3 g/mol). The total vapor pressure of the resulting solution was measured to be 12.69 kPa at 25oC. Given that the vapor pressure of pure chloroform at 25oC is 25.9 kPa, calculate the vapor pressure (in kPa) of pure liquid A at 25oC. (Assuming the mixture solution behaves ideally.) (Input your answer with 3 significant figures. No need to input any units.)