Nitric acid samples were prepared by diluting the 68 w/v% high purity-grade or 61 w/v% electronic grade concentrated nitric acids to 1 w/v% with milli-Q water in volumetric glassware. What does this mean ? how is this prepared? explain procedure of sample preparation and what is the dilution factor
Q: Would it be reasonable to store the standardized KMnO4 solution in a screw- cap bottle, if the cap…
A: Answer - According to the question - Given - KMnO4 is not a primary standard and is standardized…
Q: An initial dilution was performed by adding 0.2 ml of stock solution to 3.8 ml of diluent. You…
A: We are authorised to solve only one question at a time. Please post rest of the questions…
Q: One litre of aqueous sample containing the organic pollutant, polychlorinated biphenyl (PCB), was…
A: A one litre sample of polychlorinated biphenyl sample is extracted with two times each time with 50…
Q: Arrange the following steps in the correct order. I. Prepare the separatory funnel. II. Mix and…
A: I. Prepare the separatory funnel. V III. Add the solution to be…
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: Why is the final product from recrystallization isolated by vacuum filtration and not by gravity…
A:
Q: You need to purify 0.8 grams of an impure sample of trans-cinnamic acid. After the purification is…
A: In the recrystallisation process of trans cinnamic Acid, A mixed solvent ethanol and water have to…
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: at Levothyroxine dissolves in water, at least to the extent necessary for this problem.) Use…
A: Given : volume of solution to be made = 50 mL Hence volume of solution in L = 50 / 1000 = 0.050 L…
Q: Why do we not need "spitless" injection to measure the toluene content of gasoline using gas…
A: Given : Splitless injection. To find : Reason for using Splitless injection in gas chromatography.…
Q: A 100 kg of mixture containing 40 w.% Ethyl glycol in water is contacted with an equal amount of…
A:
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- To purify the mobile phase gas in GC we commonly use: a) IEC b) adsorption c) partition d) traps…
A: Note: Here you asked multiple questions in a image, So according to guidelines here is a solution to…
Q: Eren, Rochelle, and Sarah were assigned to do a recrystallization experiment using three different…
A:
Q: Imagine you are an organic chemistry student who isolates a crude sample of salicylic acid following…
A: The melting point is largely dependent on the impurities present in the substance. If there are…
Q: After the extraction of benzoic acid from 0.5g impure sample, the weight of pure benzoic acid in the…
A: The given data- The weight of the impure sample = 0.5 g The weight of the pure benzoic acid = 0.4 g…
Q: Write TRUE if the underlined word/phrase makes the statement correct. Otherwise, write the correct…
A: According to Q&A guidelines of Bartleby, we are supposed to answer only the first 3 sub-parts of…
Q: Upon running a standard recrystallization in 90:10 EtOH:water you reach a point where crystals are…
A: In recrystallization process , we have a certain method to induce crystallization if crystal don't…
Q: 24 The volume tric Karl Fischer method is suitable for samples with a high water content. 7…
A: THE ANSWERS ARE :- (36) TRUE. (37) FALSE. (38) TRUE . (39)…
Q: Jamar spotted the three (3) component mixture shown below to a TLC plate and developed it using the…
A:
Q: 0.56 g 1,4‐dimethoxybenzene, 0.9 mL 2‐chloro‐2‐methylpropane, 5 mL nitrobenzene and 0.52 g graphite…
A: The given problem is related to green chemistry. Given: Reactants- Mass of 1,4‐dimethoxybenzene-…
Q: Give the molar concentration of HCl with a specific gravity of 1.18 and has 37.0 % (w/w) purity. (
A: Give the molar concentration of HCl with a specific gravity of 1.18 and has 37.0 % (w/w) purity.
Q: 4. When performing a melting point on solid compound using a melting point apparatus, two melting…
A:
Q: In recrystallization, fluted filter paper is used instead of a regular cone because it minimizes its…
A: In recrystallization, an impure solid compound is mixed with hot solvent to form a saturated…
Q: Make a results and discussion in Laboratory Report Format of the following: 1. Separation of…
A: As per our Company guidelines, we are supposed to answer only first three sub-parts. Kindly repost…
Q: Which statement about the determination of the percentage purity of benzoic acid is correct? *…
A: We have given statements , we have to choose correct statement
Q: In a chromatographic analysis, a solution containing 0.0837M toluene and 0.0666M xylene resulted in…
A: Response factor can be represented as
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: 1. What are the features of samples/compounds that allow them to be suitable for Gas Chromatography…
A:
Q: for effective purification by recrystalization while avoiding performing a hot gravity filtration,…
A: Recrystallization is used to purify a sample.
Q: Starting Material mmol mL Methyl Salicylate 10.0 1.3 Weight m.p. (°C) 1.59 g 158-160 Product…
A: % Yield = 100 x mmol of salicylic acid/mmol of methyl salicylate Number of mmol = 1000 x Mass in…
Q: Fill out the Flow Scheme below. Obtain your ternary mixture and follow the steps on p. 2. in CH,Cl2…
A: 3 compounds need to be extracted. Benzoic acid Ethyl – p - aminobenzoate Naphthalene in…
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: 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: Earth, a CHEM 40.1 student, extracted a mixture of pigments from the roots of Rubia tinctorum,…
A:
Q: Polar solutes were separated by HPLC (not HILIC) with a bonded phase containing polar diol…
A: The more polar the solvent, the greater the eluent strength on a polar column, and the shorter the…
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: The
A: Given: Data tabulation on Limonene (ug/ml) & Response of Detector is given Response…
Q: In recrystallization, crystals gathered are washed with cold solvent. What would its effect on…
A: When a reaction is carried out, the product obtained is mostly accompanied by some other substance…
Q: Which of the following could result in a loss in yield in a mixed solvent recrystallization? i. Use…
A:
Q: The percentage purity of a paracetamol sample was determined by a reversed phase HPLC method as…
A: Given: Mass of powder taken = 10.0254 g. Volume of solution A prepared = 1 L Volume of solution A…
Q: method as follows: punty of an ibuprofen sample was determined by a reversed phase HPLC Y A…
A: Equation for the best-fit line of the calibration curve is: y=26820x-1323.8
Q: Extraction of the aqueous salicylic acid solutions with 10% ethyl acetate/hexane (density ~ 0.7…
A: As you have posted two independent questions in a single request, we will solve the first question…
Q: How can you tell that a compound is impure? (or pure?) What are the characteristics considered…
A: Since you have posted a question with multiple sub-parts, we will solve the first three subparts for…
Q: Mud filtration test to determine volume of filtrate and the ermeability of mud cake collected after…
A: Given that Permeability of mud cake collected after 30 min
Q: MAKE A METHODOLOGY : MATERIALS/ REAGENTS WITH SCHEMATIC DIAGRAM . THE PICTURE UPLOADED SERVES AS A…
A:
Q: 1. A solution containing 5.0 g of n-butyric acid in a 100 mL of water was extracted two times with…
A: Partition or distribution coefficient (KD) is the ratio of concentration of a compound in two…
Q: How many grams of sorbitol solution having a specific gravity of 1.335 should be used to prepare 110…
A: Specific gravity is the ratio between the density of a compound in the given solution to the density…
Q: set-up, e volatile acetc е аcet
A: Given data set: Mass of the empty flask = 351.44 g Mass of the heated flask = 355.02 g Thus, Mass of…
Nitric acid samples were prepared by diluting the 68 w/v% high purity-grade or 61 w/v% electronic grade concentrated nitric acids to 1 w/v% with milli-Q water in volumetric glassware.
What does this mean ? how is this prepared? explain procedure of sample preparation and what is the dilution factor
Step by step
Solved in 5 steps
- How can you tell that a compound is impure? (or pure?) What are the characteristics considered when taking a melting point? What is recrystallization? What is happening on a molecular level (videos are provided) How are solvents chosen for recrystallization? (single solvent or mixed-solvent system).What are the properties of a good solvent system? How are crystals collected?Which of the following could DECREASE the amount of the recovered crystals in the purification by recrystallization experiment? Collecting the recrystallized benzoic acid by filtration using a pre-weighed filter paper. Using a long-stemmed funnel in the hot filtration step. Cooling the filtered solution rapidly. Washing the recovered crystals using hot solvent. a. II, III b. II, IV c. II, III, IV d. I, II, III, IVfor effective purification by recrystalization while avoiding performing a hot gravity filtration, what is the desired solubility of an impurity at different temperatures? Hot solvent solvent after cooling
- A tea bag containing 15 grams of tea leaves with 0.7% of caffeine was used in solid-liquid extraction with 200ml of distilled water followed by liquid-liquid extraction using DCM. If 50.0mg of caffeine requires 10 ml of water and 3.0ml of DCM to be dissolved, how much caffeine can be extracted using 70.0ml of DCM? a. 4.8 x 10^-2 b. 5.7 x 10^-2 c. 3.8 x 10^-3 d. 5.8 x 10^-34g 5 g 2 g 100 g 49." R Lactic acid Salicylic acid Trichloroacetic acid Flexible collodion qs ad Sig: wart remover. Use as directed. (a) Flexible collodion contains 20% w/w camphor and 30% w/w castor oil. How many grams of each would be contained in 30 g of the mixture? (b) The specific gravity of castor oil is 0.955. How many milliliters of the oil is contained in 30 g of the mixture? (c) If the specific gravity of the mixture is 0.781, what are the percent w/v con- centrations of lactic acid, salicylic acid, and trichloroacetic acid in the mixture?Which of the following consideration are applied when choosing a suitable recrystallization solvent? (TRUE / FALSE) True False Should have a boiling point that is ~ 30-40 ℃ above room temperature. True False Dissolve the compound in a reasonable amount of solvent. True False Should be unreactive toward the compound of interest. True False Offers moderate solubility of the compound to be purified at room and lower temperatures. True False Does not dissolve impurity at all or complete/high solubility of impurity at all temperatures.
- A 532 mg of a mixture of fluorene and benzoic acid was weighed out and subjected to an extraction and recrystallization. After this purification was completed the product crystals were dried and analyzed. The purification procedure produced 174 mg of fluorene and 249 mg of benzoic acid. Calculate the percent composition of this mixture.0.56 g 1,4‐dimethoxybenzene, 0.9 mL 2‐chloro‐2‐methylpropane, 5 mL nitrobenzene and 0.52 g graphite were combined, and the mixture was refluxed for 1.5 hours. It was then cooled to room temperature and filtered. The filtered graphite was washed with 15 mL hexane. The filtrate was distilled under vacuum to remove any remaining 1,4‐dimethoxybenzene, 2‐chloro‐2‐ methylpropane and nitrobenzene (6.3 g), yielding 0.44 g 1,4‐di‐tert‐butyl‐2,5‐dimethoxybenzene (43.4% yield). What is the Atom economy, E factor, and effective mass yield?A sample of fried potatoes weighing 200 g was extracted using a volatile organicsolvent. The recovered cooking oil weighed 15 g. What methods from thisexperiment could be used to separate the cooking oil after the extraction? (evaporation, gravity filtration or vacuum filtration?) why so?
- 5.0 mL of 1-butanol was mixed with 10 mL of HCl. The reaction was put on an ice bath and 4 mL of concentrated sulfuric acid was added. This mixture was refluxed for 45 min and then the product was co-distilled with water using a simple distillation apparatus. Water and the product are immiscible. 1-butanol has a molar mass of 74.12 g/mol, a density of 0.810 g/mL, and a boiling point of 118 C. The product has a molar mass of 92.57 g/mol, a density of 0.880 g/mL, and a boiling point of 78 C. What is the nucleophile in this reaction? What is the role of H2SO4 in this reaction? Calculate the theoretical yield for this reaction. Give your answer in grams. Select the following statements that can be said about the reaction shown.A solution containing orange rind extract was analyzed using gas chromatography to measure its limonene content. The parameters used to analyze the standards and samples are listed below. Calculate the concentration of limonene in the solution in ug/mL6.0 mL of cyclohexanol, 8 mL of 85% phosphoric acid, and 10 drops of sulfuric acid are added to a 50-mL round-bottom flask with boiling chips, and the mixture is distilled into an ice-cooled receiver. The distillate is in the form of a colorless bi-phasic mixture. The cyclohexene upper layer is removed from the water layer, and dried over anhydrous calcium chloride. Isolated is cyclohexene as a clear and colorless foul-smelling liquid. Weighing data is given below. Gross mass: 51.24 g Tare mass: 48.04 g Product mass: 3.2g Question: Calculate the theoretical mass of the cyclohexene product, bearing in mind that the cyclohexanol starting material was measured by volume, not by mass (so you must use the density of cyclohexanol to convert milliliters to grams, before calculating the number of moles). Calculate the percent yield of cyclohexene obtained.