Make a results and discussion in Laboratory Report Format of the following: 1. Separation of mixture using different techniques 1.1 Simple distillation: Water + acetone 1.2 Fractional Distillation: Methanol + ethanol 1.3 Chromatography: Separation of mixture of Red ink and blue ink
Q: Which type of chromatography is paper chromatography? a. Liquid-liquid chromatography b.…
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Q: Which of the following spot is the most soluble in water?
A: Which of the following spot is the most soluble in water?
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Q: n paper chromatography,
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Make a results and discussion in Laboratory Report Format of the following:
1. Separation of mixture using different techniques
1.1 Simple distillation: Water + acetone
1.2 Fractional Distillation: Methanol + ethanol
1.3 Chromatography: Separation of mixture of Red ink and blue ink
2. purification of impure samples by crystallization
2.1 Copper sulfate
2.2 Potash alum
2.3 Benzoic acid
Step by step
Solved in 3 steps with 2 images
- Consider the following statements as they apply to gas chromatography. Decide if each is true or false. 1. ___ Temperature programming is necessary only for samples containing compounds with a narrow range of boiling points. 2. ___ GC carrier gases are generally inert gases like helium and nitrogen. 3. ___ The injection port temperature should be set at the average boiling point of all analytes. 4. ___ An FID is a mass-sensitive detector, not a concentration-sensitive device. 5. ___ An air peak is commonly used to determine the dead time when using an FID detector.In a chromatographic analysis, a solution containing 0.0837M toluene and 0.0666M xylene resulted in peak areas of Atoluene= 423 and Axylene= 347. To analyze an unknown sample, 10.0mL of 0.146M xylene was added to 10.0mL of an unknown toluene-containing solution, and the mixture was diluted to 25.0mL. This mixture gave a chromatogram with peak areas of Atoluene= 553 and Axylene= 582. What was the concentration of toluene in the unknown solution?Calculate the vapor pressure of propanol (b.p. 97.0 ∘C97.0 ∘C) at the gas chromatography column temperature of 95.0 ∘C95.0 ∘C using the form of the Clausius–Clapeyron equation shown ln(?1?2)=−(Δ?vap?)(1?1−1?2)ln(P1P2)=−(ΔHvapR)(1T1−1T2) where ?R is the ideal gas constant, Δ?vapΔHvap is the enthalpy of vaporization, ?1T1 and ?2T2 are two different temperatures, and ?1P1 and ?2P2 are the vapor pressures at the respective temperatures. The enthalpy of vaporization can be estimated using Trouton's rule, Δ?∘vap=(88 J·mol−1⋅K−1)×?bp.ΔHvap∘=(88 J·mol−1⋅K−1)×Tbp. ?=P= TorrTorr Calculate the vapor pressure of pentane (b.p. 36.0 ∘C36.0 ∘C) at the same column temperature. ?=P= TorrTorr For compounds of the same chemical class, what is the relationship between vapor pressure of a compound and retention in gas chromatography? As the vapor pressure decreases, retention time decreases. As the vapor pressure increases, retention time increases. As…
- what are key reactions involved in seperation of liquid mixtures by simple and fractional distillation and gas chromatography? chemicals used: 10ml 1:1 mixture of ethyl and butyl acetate techniques: simple and fractional distillation, gas chromatography. target molecules: Ethyl acetate C4H8O2 Butyl acetate C6H12O2A spot of crude plant extract was placed on a glass plate coated with C18 silica gel. The chromatogram was developed using an appropriate solvent. The result is shown below. Which of the following spot is the most soluble in water?A scientist wishes to measure the concentration of methyl benzoate in a plant stream by gas chromatography. He prepares a sample of butyl benzoate to use as an internal standard. The results of a preliminary run, which used a solution known to contain 1.37 mg/mL of methyl benzoate (peak A) and 1.51 mg/mL of butyl benzoate (peak B), are shown. The area of peak A is determined to be 3.40×102 and the area of peak B is determined to be 398 measured in arbitrary units by the computer. To measure the sample, 1.00 mL of a standard sample of butyl benzoate containing 2.49 mg/mL is mixed with 1.00 mL of the plant stream material. Analysis of the mixture gave a peak area of 437 for peak A and 415 for peak B. What is the concentration of methyl benzoate in the plant stream?
- Can paper chromatography be used to separate and identify very volatile substances? How do I prove this.Earth, a CHEM 40.1 student, extracted a mixture of pigments from the roots of Rubiatinctorum, commonly known as rose madder. Earth spotted the root extract on twohydrophobic silica gel plates. He then placed each plate in separate developing chambers,one containing solvent system WHITE and the other housing solvent system MIX. Earthallowed the chromatograms to develop for around five minutes. Afterwards, he removedthe plates from the containers and placed them inside an iodine chamber. Thechromatograms resulting from the TLC experiment after visualization are illustrated asfollows. The distances travelled by each spot and by the solvents were measured andrecorded in the displayed table.10g coffee 4g sodium carbonate 40m dichloromethane 160ml distilled water coffee filter What are the principles behind caffeine being extracted from coffee using the above items? 1st sodium carbonate mixed with coffee then brought to a boil for 20min then solution/grinds are filtered. Then solution is added to a separatory funnel with 15ml of dichloromethane and two layers are observed so the bottom layer with DCM contains the caffeine, then this layer is collected in a beaker and dried out using molecular seeds. Then the solvent is brought to a boil with crude caffeine remaining and recystallized using 95% ethanol and brought to a boil again. Then the contents are vaccum filtered and allowed to dry resulting in 30mg caffeine.
- Arrange in INCREASING Rf if the mixture underwent paper chromatography with the same solvent system. Explain how you get the answer I. 2-chloropentaneII. pentanoic acidIII. cyclopentaneIV. pentanal a. II = IV < III < I b.II < IV < I < III c.I < II < III < IV d.III < I < IV < IIPlease answer all 5 questions (it could be short answers). 5-1. What is the main barrier to separating liquid mixtures of less than 500 mL by distillation? 5-2. A sample mixture of ethyl benzoate (bp 212 Celsius) and dodecane (bp 216.2 Celsius) is injected on two GC columns. Column A has DC710 silicone oil as the stationary phase, and column B uses polyethylene glycol as the stationary phase. Which substance would be certain to elute first from column A and would the same material be expected to elute first from column B? Which column, A or B, would be expected to give the better separation of these two substances? 5-3. Question 5-2 refers to separating a mixture of two high boiling liquids by gas chromatography. These materials have similar boiling points. List several GC variables and conditions that would make it easier to separate thesesubstances by gas chromatography 5-4. Capillary GC columns have better resolution than packed columns even though the enormous surface area…hree components in a mixture have varying distribution constants between the mobile phase and the stationary phass One of the components has a very low distribution constant, Would this component likely elute first or last and how would you design an experiment or modify the components of the separation to make it perform in the opposite manner?
