Describe some observations you found fascinating. Discuss the purpose of acquiring a melting point and what it means to a budding scientist, like you! Discuss how we might have lost material in the experiment (i.e. operational error)? List the two major functional groups ( and ) present in the structure of acetylsalicylic acid. Weight of tablet = 2grams Weight of ASA recovered or isolated = 100mg. Please answer those 2 not graded thanks

Describe some observations you found fascinating. Discuss the purpose of acquiring a melting point and what it means to a budding scientist, like you! Discuss how we might have lost material in the experiment (i.e. operational error)? List the two major functional groups ( and ) present in the structure of acetylsalicylic acid. Weight of tablet = 2grams Weight of ASA recovered or isolated = 100mg. Please answer those 2 not graded thanks

Macroscale and Microscale Organic Experiments

7th Edition

ISBN:9781305577190

Author:Kenneth L. Williamson, Katherine M. Masters

Publisher:Kenneth L. Williamson, Katherine M. Masters

Chapter7: Extraction

Section: Chapter Questions

Problem 7Q

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You are employed as a coop student at the Drug and Alcohol Testing Association of Canada (DATAC) developing analytical tests for sports doping agents. You are asked to prepare a procedure for the extraction of methylphenidate, the active compound in Ritalin, from urine samples (consider them as simple aqueous layers, you do not need to consider other components!). The goal of the procedure is to extract the methylphenidate into an organic layer which will then be evaporated, and the residue will be tested for the drug.You find that methylphenidate is highly soluble in 2-methyltetrahydrofuran, a bio-renewable solvent. Draw the structure of 2-methyltetrahydrofuran and give two reasons why it is a good solvent choice for liquid-liquid extraction.
Name of experiment : Gas Chromatography (GC);Separation of alcohols Q1:Purpose of experiment Q2:Introduction
If the solubility of a compound A in ether is 30g/100 ml, and the solubility of A in water is 15 g /100 ml. a) If 100 ml of aqueous solution of 3g of A are extracted twice with 100 ml ether. How much A total is extracted? b) How much A would be extracted if only one extraction, but with a volume of 200 ml of ether were extracted? c) What is your conclusion from the amount of A extracted in problems a and b above?
1. A vial containing an unknown sample is suspected to be one of the following compounds (mp.): urea (~133 °C), 2,4-dimethylacetanilide (~133 °C), phenacetin (~134°C) or 3-chlorobenzamide (~134 °C). A list of melting points taken on a machine when the 50% of the unknown by volume has been mixed with 50% each of the possibilities is shown in the following table: Melting point (°C) of mixture Substance mixed with unknown (50% each) urea 133.5-134.0 2,4-dimethylacetanilide phenacetin 3-chlorobenzamide 108.6-128.1 105.7-120.4 120.3-130.5 Identify the unknown and explain your reasoning, using the notes you have taken in the lab.
An organic chemistry laboratory Extraction; the extraction of crude naphtalene- benzoic acid mixture. Naphthalene is a suspect carcinogen and is toxic to aquatic life. Find an alternative pair of molecules that adhere better to the principles of green chemistry and can be separated by extraction using green' solvents. (kindly answer fully)
Please answer the question at the bottom, Thanks. LAB NOTES FOR PREPARATION OF BUTYL MAGNESIUM BROMIDEAND ITS SUBSEQUENT CONVERSION TO AN ALCOHOL To the reaction flask were added 2.5967 gram of magnesium turnings, about 20 mlof diglyme, and a solution of 13.5942 gram of butyl bromide in about 25 mldiglyme.The procedure as per the lab manual was initiated. After the required heating timewas completed the reaction mixture was allowed to cool to room temperature.Then a solution of 6.1123 gram of acetone in about 15 ml of diglyme was addeddropwise as per the lab manual.The rest of the lab manual procedure was completed, ultimately affording 2.5532gram of an oily, clear and slightly yellow liquid, presumed to be 2-methyl-2-hexanol. Boiling point as measured by distillation was 138 – 141 deg C.About 0.8 ml of the presumed 2-methyl-2-hexanol was placed in an NMR tube towhich was added 2 drops of TMS. The tube was capped, then inverted and righted20 times to thoroughly mix the product and…
Please answer the question at the bottom, Thanks. LAB NOTES FOR PREPARATION OF BUTYL MAGNESIUM BROMIDEAND ITS SUBSEQUENT CONVERSION TO AN ALCOHOL To the reaction flask were added 2.5967 gram of magnesium turnings, about 20 mlof diglyme, and a solution of 13.5942 gram of butyl bromide in about 25 mldiglyme.The procedure as per the lab manual was initiated. After the required heating timewas completed the reaction mixture was allowed to cool to room temperature.Then a solution of 6.1123 gram of acetone in about 15 ml of diglyme was addeddropwise as per the lab manual.The rest of the lab manual procedure was completed, ultimately affording 2.5532gram of an oily, clear and slightly yellow liquid, presumed to be 2-methyl-2-hexanol. Boiling point as measured by distillation was 138 – 141 deg C.About 0.8 ml of the presumed 2-methyl-2-hexanol was placed in an NMR tube towhich was added 2 drops of TMS. The tube was capped, then inverted and righted20 times to thoroughly mix the product and…
Complete the following table of reagents – think carefully about the stoichiometry. You will need to write these down to carry out the experiment. For each gram of benzil starting material. Molecular Mass Reagent Volume (mL) density Equivalents Amount required (g/mL) weight (g) (mmol) (g/mol) benzil 210.23 4.75 1.00 1.00 urea 60.06 0.432 1.75 7.19 Sodium hydroxide (30% w/v solution) 39,847 4 1.2 4.0 loo What volume of ethanol is required, per gram of benzil, to generate a solution with a concentration of 0.33M? Show your working.
The first goal of this study is to isolate the volatile oils and essential oils that give oregano and lemongrass their insecticidal properties. To create a formula for a bug-repellent lotion that makes use of oregano and lemongrass extracts as active ingredients. To identify the optimal concentration of oregano and lemongrass extracts that will have the greatest possible effect on preventing pest infestation. Direction: Explain each of the sentences the title of this research is "Development and utilization of insect-repellent lotion using oregano and lemongrass” this is connected to chemistry. To perfect the formulation of the lotion so that it may be applied to the skin comfortably. To determine the effects that applying an insect repellent lotion containing oregano and lemongrass has on the environment.
A student use the same protocol as in the lab manual to extract benzoic acid, phenol, and naphthalene. Below are the steps he took Step 1 - Dissolve all three in 15 ml ether and place in separatory funnel Step 2- Add 15 ml of sodium carbonate and mix well Step3 - Isolate the aqueous layer and Add hydrochloric acid, which resulted in a precipitate Step 4- Add 15 ml of sodium hydroxide to the ether layer and mix Step 5- Isolate the aqueous layer and add hydrochloric acid, which resulted in a precipitate. Step 6- dry the ether layer and collect the solid that is left
Can you please provide steps for how to answer the following? This is not a graded question, it's just for practice and will give me no credit. The concentration of the glucose stock solution in bottle is 50 uM. If you take 25 ml out of the above stock solution and add it to a test tube containing the following reagents 5 ml of water, 10 ml of cofactor and 10 ml of buffer. What will be the final concentration of glucose in the test tube? a. 0.015 mM b. 0.020 mM c. 0.025 mM d. 0.035 mM e. none.
1.Each of the student statements below is wrong. You will need to explain why they are not correct. (a) All my compound dissolved right away in the small amount of solvent I added at room temperature, and I didn’t need to heat it at all. This means I’m going to get lots of pure compound out. (b) I did a recrystallization of naphthalene and my percent recovery was very high (99%), so I must have pure product. (c) When you’ve dissolved all your compound in hot solvent, and you’re in a hurry, it’s ok to just place it straight into the ice bath.