O-2 Fractional Distillation Modified Procedure(1)

In the synthesis of Sudan-1, the following precursors were used: Aniline – 0.2 mL β-naphthol – 0.35 g   Experimental data Weight of vial, g 13.1085 Weight of vial + recrystallized product, g 13.4714 Experimental melting point, °C 129-132 Given this data: What is the theoretical yield? What is the percent yield? What is the purity of the dye based on experimental melting point (theoretical is 131-133 °C) Please show solutions and equations

Synthesis of Orange II dye. During vacuum filtration, is it possible to use cold water for rinsing/collecting the Orange II dye? Clearly explain why or why not.

Chemistry Using FTIR to see structure change in quinine after exposing it to light for 2hr seems like quinine degraded. Can it degrade by exposure to UV light for hours? What source of errors could have happened? I know that maybe I used small concentration.

Please type all of the parts to this question occordingly to the instructions.  Here is an example of a formal procedure based off of the experiment presented in Mohrig:Sodium hydroxide (4.6 g) was dissolved in water (25 mL). This solution was added to a 100 mL round bottom flask along with methyl salicylate (2.0 mL) and a stir bar. The mixture was heated at reflux for 15 min and then progressively cooled to 5 °C. The solution was acidified with 3M sulfuric acid (15-20 mL), and the resulting solid was collected by vacuum filtration. The crude salicylic acid was recrystallized from water to yield ???? g of final solid. The melting point and IR were taken to assess purity. Calculate the molarity of the solution of sodium hydroxide that is used.a. M = b. If the original procedure is the base scale (100%), how far are we scaling down the reaction when using 0.75 mL of methyl salicylate? (Example: the original uses 2.0 mL, if we were to use 1.0 mL, we would be scaling the reaction down…

Draw the synthesis setup for Ni(dppf)Cl2, make sure to include the round-bottom flask, reflux condenser, hotplate, and the connections to the vacuum and water-cooling systems. Design an experiment remove separate Ca2+ and herbicide Atrazin (organochloride) from aqueous salt solution.

Why is strict implementation of LQMS (Laboratory Quality Management System) or GLP is necessary ? What are the elements ?

Fractioned Distillation Microscale Looking at this set up, are there any potential problems with it? Please explain.

Briefly, discuss reflux and why it is commonly used in organic chemistry.

Explain two separation techniques how may be feasible for Benzene vs Phenol. One can be an industrial approach other can be a laboratory-scale method.

The concentration of hydrolyzed nitrocefin at each time point for an experiment is given below. Time (min) Concentration () 0.5 6.01 1 11.78 1.5 17.6 2 23.51 2.5 29.58 3 35.31 3.5 39.73 4 44.5 4.5 48.18 5 50.05 5.5 52.72 6 54.01 6.5 55.06 7 55.65 7.5 56.39 8 56.74 8.5 57.49 9 58.03 9.5 58.61 10 58.69 Make a graph that plots the concentration of hydrolyzed nitrocefin (in μM) against time (in seconds) using Excel, R, SPSS or other computable software. Where appropriate, include a trendline that shows the linear range on your graph. Include the equations for the trendlines and the R2 value on the graph. Your graph should also include a title and appropriate titles for the x- and y-axes, with units included where appropriate. To determine the initial velocity of a possible insert in this experiment, you must determine what the linear range is in these data. Based on your graph, which time points represent a suitable linear range?

Write TRUE if the underlined word/phrase makes the statement correct. Otherwise, write the correct WORD/PHRASE that will make the statement true. If there are two bold words/phrases in a number, write your answer for EACH of the bold words/phrases 1. 6-hydroxy-1-naphthoic acid is soluble in 5% NaOH and soluble in 5% NaHCO3. 2. The addition of excess charcoal would decrease the % recovery in the purification by recrystallization. 3. If the target compound is contaminated with impurity, the melting point will be higher than the theoretical value and the melting range is large.

In an EAS Reaction the compounds 5.0g of acetanilide, 0.2g potassium bromate, 5ml acetic acid, 0.9 ml hydrobromic acid solution, and 5 ml saturated sodium bisulfite solution are used.  Given these compound and obtaining a yield for the experiment at 6.3 grams which yields 5.3 grams after recrystallization and drying, Please find the theoretical yield and the percent yield?

Using the two images attached please write one paragraph explaining the analysis Also write another paragraph of the complete method in your own words Please please please answer as fast as possible

CREATE A SCHEMATIC DIAGRAM USING THE PROCEDURE: Weighing of standard reagents 1. Make an improvised weighing dish for solid samples (i.e. aluminum foil). Put the foil inside the analytical balance. 2. Press TARE. 3. Weigh accurately 0.4000 grams of NaCl powder in the foil. The reading of the weight must not exceed + 0.0030 g. Note that unused or excess chemicals should never be returned to the stock bottle. 4. Close the balance glass door. Note the actual weight of the NaCl powder that is reflecting on the analytical balance. 5. Transfer carefully the contents in a 150-ml beaker.

Pls help ASAP AND PLS DO ALL ASKED QUESTIONS I HUMBLY REQUEST. I have also attached q15 as a sample for you to see.

1. studies have revealed extremely high metals and particulate matter in rivers, making them unwholesome for for drinking. With your knowledge on analytical separation and analyses, outline a suitable analytical separation protocol that can be employed to recover polluted river bodies and make them wholesome for drinking. 2. It has been noticed that adulteration of palm oil with carcinogenic dyes are on the rise. Use your knowledge in analytical process to systematically outline a protocol you will follow to process adultered palm oil to gain qualitative and quantitative information spectroscopically about any added toxic dye. Explain also the basis for your protocol of choice. 3. Descibe how you would prepare the following solutions, 1L of 0.10M NaoH using sodium hydroxide pellets. 1L of 150.0 ppm cu2+ using cu metals. 1L of 4% v|v acetic acid using glacial acetic acid.

read the following Case Study and answer the questions provided. After only a few days in your new lab, you notice that one of the senior students is quite open about what appears to be many questionable experimental practices: he does not really keep a notebook, but numbers a new page for each reaction he performs and scribbles out a little information about what he had done, sometimes only the date and the starting time...By now, his practices are quite well known in your particular lab room, and a number of jokes and asides by your labmates affirm your perceptions. Indeed, even the senior student has been heard to quip: "If I had done this the right way, I think the yield would have been 75%." When your research advisor comes to lab for a weekly update on progress, this student presents his data on the purified materials and reports a 75% yield. The research advisor and this student have already published 3 papers based on this result. Who is potentially affected by this student's…

For this experiment, yield was not important, but in onsite lab, as well as large-scale processes, a good yield is crucial in the success of a purification step. In what ways do you think a high yield can be assured in recrystallization?

how would you do question 5? this is a non graded practice worksheet

When an organic reaction is undergoing reflux, what are some potential errors (not human or instrumental) that would cause the reflux to be incomplete?

In the organic chemistry experiment of an Extraction of crude napthalene-benzoic acid dissolved in ethyl acetate solvent. Why are multiple small extractions better than 1 large extraction?. Prove this with mathematically. Kindly use math and numbers! showing everything.

Why BH 3-THF not BH 3 is used in the experiment? Plz do Asap....!

( plz asap within 5 min....plz dont answer after 9.00 PM ..i will write plagarism if u answer after 9.00 pm

#1. Part A. in a drug discovery program, a hit compound________. A. Shows activity in an animal model of disease B. Is active in target/ whole-cell assays in vitro C. Is purchased from a commercial vendor D. Is derived from screening natural product libraries Part B. When using TLC to monitor an organic chemistry reaction, which could be an indication that your desired reaction has gone to completion? A. the stationary phase changes colors B.the mobile phase runs to the top of the tlc plate C.the starting material spot disappears and a new spot appears D,the starting material spot remains on the tlc plate

How is using thiamine as a catalyst rather than cyanide an application of greenchemistry?   PROCEDURETo a six inch test tube was added thiamine hydrochloride (0.65 g), followed by water (2mL). The mixture was gently shaken until homogeneous, and then ethanol (7.5 mL)was added. Finally, sodium hydroxide (10%, 1.5 mL) was added and the mixture wasgently stirred to ensure complete mixing.Benzaldehyde (3.8 mL) was then added at room temperature in one portion with gentlestirring. The pH of the resulting reaction mixture was determined and adjusted to >10by dropwise addition of 10% sodium hydroxide. The reaction mixture was then partiallysubmerged in a 65 °C water bath2 and the progress of the reaction was periodicallymonitored by TLC analysis.Once TLC analysis indicated that the reaction was complete, the reaction mixture wascooled to approximately room temperature, and then chilled in an ice-water bath. Theresulting precipitate was collected by vacuum filtration and air-dried. The…

What is the unknown compound from the simulation and how did you determine the identity of the unknown compound? Describe the steps.

2.Dscribe The History of Forensic Chemistry? 3.Enumerate and discuss the functions of forensic Chemist. 4.Discussed the Purposed of the Golden rules in the practice of Forensic Chrmistry. 5.What is Toxicology. 6.Discussed the History of Toxicology. 7.Discussed Tbr collection of Sample for toxicology. 8.Discussed The importance of toxicology. 9.Discussed the Types of poison. 10. Discussed the entrance and elimination of poisons in Human body....

Consider the structures of cholesterol and ?-carotene. Which do you think will have the highest Rf value if the solvent used was acetone - hexane (20:80)? Why?

A small intermittent fraction is collected and discarded. This is a good practice because     intermittent fractions contain unknown substances   intermittent fractions contain substances synthesized during distillation   intermittent fractions are composed of both unseparated components of the mixture   intermittent fractions are toxic   intermittent fractions decompose quickly over time

If an analytical method relies on a measurable property of an analyte that can be correlated with the amount of the said analyte, what type of analytical method is it?   Oxidative methods   Instrumental methods   Blank Correction methods   Classical methods