The procedure requires the use of a 1.1 molar equivalent of benzyltriphenylphosphonium chloride (BTPC, 388.90 g/mol) for this experiment. How many grams must be used to accomplish this if 1.86 mL of benzaldehyde (106.12 g/mol) is employed? Benzaldehyde density = 1.04 g/cm3 %3D
Q: Which would affect the accuracy of a melting point determination? Using a thermometer that has not…
A: Melting point is the temperature at which solid converts into liquid.
Q: Calculate the molarity of the solution of sodium hydroxide that is used. a. M = b. If the original…
A: To answer the sub-parts related to the question above.
Q: 7. After completing Part 1 of the experiment, you take the melting point of your recovered benzoic…
A: Melting point represents the span of the temperature at which the crystals or the sample first start…
Q: 1.Describe other melting point apparatus that are available for routine analysis. 2. Explain the…
A: Melting point apparatus that are available for routine analyis:-
Q: 1. You will be separating a binary mixture in this experiment. What are the two compounds in the…
A: Since you have asked a question with multiple sub-parts, we will solve first three sub-parts for…
Q: particular extraction proceeds with a distribution coefficient of 6. The system consists of 3.5 g of…
A: Fraction extracted and fraction remains in aqueous layer formula is W1= W0 × (V1/KpV2+V1)^n W0=…
Q: . In the solution step, an unnecessarily large volume of solvent is used. i. Effect on…
A: Recrystallization is the purification technique. In this technique, the hot solvent is used to…
Q: 2 Suppose a particular extraction proceeds with a distribution coefficient of 7.5. The mixture…
A: Given that, Distribution coefficient KD = 7.5 Certain amount of caffeine dissolved in 100 ml of…
Q: 1,4‐Dimethoxybenzene (0.642 g) was dissolved in 2.0 mL acetic acid in a 25 mL Erlenmeyer flask using…
A: The given problem is related to green chemistry. Given: Reactants- Mass of 1,4‐dimethoxybenzene-…
Q: In a similar experiment, the mass of 3 PB tablets was measured to be 3.1177 g. The tablets were…
A:
Q: Consider a mixture containing 0.5 g of benzil and 0.05 g of benzoin. Your task is to isolate benzil…
A: A mixture of benzil and benzoin are given. a) Isolation of both these compounds is not possible by…
Q: Vaccum filtration is the major technique used in this experiment. The following step sequences are…
A: The vacuum filter may be described as the approach which is basically used to disparate the solid…
Q: Using reversed phase chromatography in order to separate chloroquine and hydroxychloroquine. Which…
A: Between chloroquine and hydroxy chloroquine, second compound is much more polar than first one. This…
Q: Suppose we start with 3.0g of contaminated benzoic acid. After recrystallisation we end up with 2.3g…
A: Given Mass of contaminated benzoic acid = 3.0 g Mass of pure benzoic acid = 2.3g
Q: Are the ammonia distillation and the AAS a macroanalysis or a microanalysis? In which analysis is…
A: Analytical chemistry involves the quantitative and qualitative analysis of substances. Macro…
Q: 00 80 60 40 20 0 20 40 60 80 1
A: DISTILLATION Distillation is the process of selectively boiling a component in a liquid mixture and…
Q: How might cyclohexane give a false positive when choosing a solvent for recrystallization?
A: Melting point of cyclohexane = 6.47 oC Cyclohexane is not soluble in solvent at high temperature,…
Q: Grignard synthesis begins with 10 ml of 3 M Phenylmagnesium Bromide and 1 grams of Methyl Benzoate,…
A: In this question, we want to determine the value of theoretical yield and percent yield of the…
Q: Observations on the reaction of test samples with NaOH. Sample Observations +/- Acetamide Benzamide
A: Amides are condensation products of carboxylic acids and ammonia or its derivatives.
Q: After establishing the response factor of the instrument, the researcher collected 14.58 g of…
A: Response factor (RF) = 0.0170 Concentration of chloroform calculation: Amount of chloroform taken…
Q: Write the equations for the acid-base reactions involved in this experiment. Clearly show the…
A: Introduction: Extraction and filtration of an organic mixture are done on the basis of the…
Q: A student was given an unknown compound dissolved in acetone. The student decided to identify the…
A: Thin-layer chromatography is the technique that is used to separate or purify the compound from a…
Q: A student doing this experiment had some problems with the procedure, as described below. Explain…
A: On reaction of magnesium and hydrochloric acid, magnesium chloride and hydrogen gas is produced. The…
Q: The distribution coefficient, k for a compound “A” between hexane and water is 7.5. What weight of A…
A:
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: 10)Examine each of the errors below, discuss how the error would affect the separation. Describe how…
A: Hello. Since the question contains more than three sub-parts, the first three sub-parts shall be…
Q: In an EAS Reaction the compounds 5.0g of acetanilide, 0.2g potassium bromate, 5ml acetic acid, 0.9…
A: Acetanilidine = 5.0 g KBrO3 = 0.2 g CH3COOH = 5.0 mL HBr = 0.9 mL NaHSO3 = 5 mL
Q: If we are extracting 7 mg of caffeine using 8 ml dichloromethane . Does it make a difference using…
A: The question is based on the concept of solvent extraction. it is an experimental technique of…
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: Given 60.00 g of the compound in 60.00 mL water. Calculate amount extracted using multiple (2 x…
A: Concept- In a multiple extraction procedure, a quantity of solvent is used to extract one layer…
Q: The concentration of a culture decreases as it is serially-diluted. If you started with a culture…
A: Given the initial cell concentration of the culture, Ci = 6.0*108 cells/mL The solution is serially…
Q: An oil sample had its iodine number determined using the pyridinium tribromide method. The sample…
A: To calculate iodine number(I.N), using formula: I.N=(BmL-SmL )1.269g/mLW(g) BmL is the blank volume…
Q: 3. A student separated an unknown mixture of ions using the procedure of Part A. When the spots were…
A: The spotting capillary is required for putting a drop of solution on chromatography paper due to…
Q: Draw a FIVE STEP Schematic diagram of the procedure on how to separate pure crystals of CuSO4 , Alum…
A: given- CuSO4 , Alum and Benzoic acid
Q: A yellow compound, dissolved in methylene chloride, is added to a chromatography column. The elution…
A: Chromatography is a laboratory method for the isolation of a mixture. In a fluid called the mobile…
Q: (Submit your answers on a separate sheet if necessary.) 1. If some of your unknown sample failed to…
A: These Questions are related to the effect of the error on experimental data calculation.
Q: What is the polarity of the compounds closest to the point of application on the filter paper when…
A: Chromatography is used to separate mixtures of substances into their components. All forms of…
Q: 6.0 mL of cyclohexanol, 8 mL of 85% phosphoric acid, and 10 drops of sulfuric acid are added to a…
A: The percentage yield can be calculated by the formula = Actual yield x 100 /theoretical yield
Q: An oil sample had its iodine number determined using the pyridinium tribromide method. The sample…
A:
Q: The following questions regard the chromatograms shown below: Which column gives a greater…
A:
Q: Solubility of Amines in Acid Put 2 ml of water in a 10x75-mm test tube. Add 5 to 10 drops of…
A: Upon addition of acids the aniline forms the ionic compounds and becomes soluble in water but upon…
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: ATION
A: Now, Below are the methods mentioned evaluating the steps,
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: 4. In a distillation of a mixture of acetone (bp. 56°C and dichloromethane bp. 40°C), a fraction…
A: The boiling point of acetone and dichloromethane is 56 oC and 40 oC respectively. The change in…
Q: 2. When separating acetone (an organic liquid) from LiBr (a solid impurity), which would be the most…
A: Acetone is an organic liquid so it is volatile in nature while LiBr is solid so it is very less…
Q: 1.What is the advantage of using 12 in this experiment? 2. Why is the concentration of lodine much…
A: The iodination of acetone can be represented as:
Q: Draw a five-step Schematic diagram of the procedure on how to separate pure crystals of CuSO4 , Alum…
A: Answer - CuSO4 - Copper(II) sulfate, also known as copper sulphate, are the inorganic compounds…
Q: 1. What can you conclude if your dry aspirin sample has a lower melting point than the literature…
A: We’ll answer the first question since the exact one wasn’t specified. Please submit a new question…
Q: Based on the resulting chromatograms after visualization with iodine vapor, which between the…
A: A question based on purification, which is to be accomplished.
Trending now
This is a popular solution!
Step by step
Solved in 2 steps with 1 images
- In a Grignard reaction, 1.4555 g phenyl bromide, 10. g carbon dioxide, 0.5734 g magnesium filings, and 30.2 mL of 6M HCl were used but only 573 mg of benzoic acid were isolated after recrystallization? what was the percent yield for the overall process? Give the answer to the nearest whole number pleaseA student rushed through this experiment. Describe the effect that the following procedural changes would have on the percent recovery of acetanilide. Briefly explain the basis of each answer.(a) Rather than adding 0.5-mL portions of boiling solvent to the acetanilide, the student added 5-mL portions of boiling solvent.(b) The student did not pre-heat the gravity filtration apparatus.(c) The student forgot to cool 5 mL of solvent in Part 5 and washed the crystals with room-temperature solvent.Suppose we start with 3.0g of contaminated benzoic acid. After recrystallisation we end up with 2.3g of pure benzoic acid. What is the percentage recovery of the experiment?
- 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 yellow compound, dissolved in methylene chloride, is added to a chromatography column. The elution is begun using petroleum ether as the solvent. After 6 L of solvent have passed through the column, the yellow band still has not traveled down the column appreciably. What should be done to make this experiment work better?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, IV
- 1,4‐Dimethoxybenzene (0.642 g) was dissolved in 2.0 mL acetic acid in a 25 mL Erlenmeyer flask using heat from a hot plate. Once the solid dissolved, 1.0 mL tert‐ butanol was added, and the reaction mixture was cooled in an ice bath. Then 2.0 mL concentrated sulfuric acid was added in 2‐3 drop portions,stirring the mixture after each aliquot. After the addition, the flask was removed from the ice bath and allowed to sit at room temperature for 15 minutes. Then 1.0 mL water was added dropwise to dilute the acid and the reaction mixture was added to 40 mL cold water in a 100 mL beaker. The solid was vacuum filtered and washed with 5 mL cold water, giving 52 g filtrate. The product wasrecrystallized from 4.5 mL methanol, yielding 0.317 g purified 1,4‐di‐tert‐butyl‐2,5‐dimethoxy benzene (27.2% yield). What is the atom economy, e-factor, and effective mass yield?A student forgot to add the mass of the unknown solute in trial 1 to the mass of the solute that was weighed for trial 2 and then added to the cyclohexane-solute solution used in trial 1. How would this omission affect the calculated molecular weight of the solute?12 g of compound “Y” dissolves in 10 ml of acetone at 25 0C and 0.85 g of the same compound dissolves in 10 ml of boiling acetone. If 5.0 g of compound “Y” were to be recrystallized from 75 ml acetone, what will be the next maximum amount of “Y” that will be recrystallized?
- A sample of anhydrous NaHCO3 (FM = 84.007) is suspected to be contaminated with either NaOH (FM = 39.997) or Na2CO3 (FM = 105.989). To verify the suspicion, a 0.7483 g sample was dissolved to prepare a 50.00 mL solution, and a 10.00 mL aliquot was taken to prepare a 100 mL solution, where 25.00 mL was analyzed using double flask method. If the sample requires 0.45 mL of standard 0.0125 N HCl to reach the phenolphthalein endpoint and 35.95 mL to reach the bromcresol green endpoint, calculate the percentage composition (in %w/w) of all the basic components in the sample.In this experiment, 0.070 g of caffeine is dissolved in 4.0 mL of water. The caffeine is extracted from the aqueous solution three times with 2.0-mL portions of methylene chloride. Calculate the total amount of caffeine that can be extracted into the three portions of methylene chloride. Caffeine has a distribution coefficient of 4.6, between methylene chloride and water.1. In recrystallization, the goal is to obtain a purified material with maximum recovery? What are the effects of the operations below on purity and recovery? Explain briefly. a. In the solution step, an unnecessarily large volume of solvent is used. i. Effect on purity: ii. Effect on recovery: b. The crystals obtained are washed with cold solvent. I. Effect on purity: II. Effect on recovery: C. The crystals referred to in (b) are washed with hot solvent. I. Effect on purity: II. Effect on recovery: