Reduction of Camphor to Borneol and Isoborneol

Why is it appropriate to use an air condenser in this experiment? Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a) it is able to prevent 4-tert-butylphenol from evaporating b) it is able to prevent 4-tert-butylphenol from subliming c) it is able to prevent copper(II) bromide from evaporating d) an air condenser can prevent evaporation of acetonitrile because it has a boiling point of 81-82 °C and will not be boiling at 60 °C e) an air condenser can prevent water from entering the reaction flask

1. Several procedures for the analysis of caffeine involve extracting the caffeine into an organic non-polar solvent (such as methylene chloride CH2Cl2). This about your experiment and what is discussed in the introduction. What might the advantage be for this approach? What is a disadvantage? 2. Think about what you said in the question above. If your sample was espresso, would your answer change? Why? 3. I was careless and ended up using a wavelength other than the peak (Say 250 nm). Would I still be able to carry out the experiment successfully? What might be the reason that I do not get optimum results? 4. I carried out the experiment using a scratched (or several scratches) cuvet for one standard, and clear cuvets for others. How might my calibration curve change (improve or get worse and why)? Pllllz answer these questions as soon as possible

please upload the correct answer, don't make an error, so I can see all the answers

Stoichiometry: Prolonged exposure of some functionalities to the eluent (methanol) in this experiment may lead to undesirable reactions. In one case, Acetylsalicylic acid (Aspirin) can react with methanol to form salicylic acid and methyl acetate. If 800 mg of Acetylsalicylic acid and 1 mL of Methanol undergoes such a side reaction (known as "Methanolysis") to completion: (a) write a balanced equation (draw all molecules instead of writing chemical formulas), (b) what is the limiting reagent? (c) predict the grams of salicylic acid and methyl acetate to be produced in this process. Show calculations. Hint: you can determine the grams of 1 mL of Methanol through its density.

The Background section of this lab explains why weight percent (%w/w) can be useful for comparing the relative amount of a desired or "active" compound in different products. During the lab, a major goal will be to decide which of your experiment flasks yield data that would allow you to correctly calculate the %w/w of sodium bicarbonate in these tablets. Let's assume that you correctly choose one flask for this calculation. If the amount of NaHCO3 in that flask was 2.80 g and the original weight of the tablet was 4.50 g, what is the %w/w NaHCO3 in the tablet that went into this flask? GIVE YOUR ANSWER TO TWO DECIMAL PLACES. Your Answer: Answer

Please help do the brown sugar and white sugar separately

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

Which of these statements regarding dissolved gas analysis is incorrect? Select one: A. For low temperature faults methane and hydrogen are generated B. As the temperature of the fault increases, ethane is produced reducing the methane content   C. At higher temperatures methane starts increasing overtaking the ethane content and ultimately becomes predominant D. Moisture content is measured is as free and dissolved levels

Analytical Chemistry Laboratory Experiment: Determination of Iron Content in Water Samples by Visible Spectroscopy

How does recrystaliziation work and how would you identify an unknown substance using it?

When extracting an aqueous solution with an organic solvent and after agitation and settling, the two layers are of very similar appearance. You know that the organic layer contains your product and the aqueous layer is the waste layer, but you are not 100% certain which layer is which. What simple test might you perform to determine which is the organic layer?

What will happen to Dichloromethane when it is added to Silver nitrate? Does it gives a postive solution? Give an inference why

1. In this method, the mass of the analyte or a compound derived from the analyte is determined. 2. Spectroscopic methods of analyses measure the interaction between, analyte atoms, molecules, or emission of radiation by analytes. 3. and samples are materials where its constituent parts can be distinguished visually or with the aid of a microscope. 4. These types of samples must be contained in closed containers to avoid its evaporation and change in concentration. 5. The indicated name. is a process of determining how much a given sample is the material by its 6. The components in a sample aside from the analyte that affects the final measurement are called 7. Techniques or reactions that apply to a few analytes are said to be usually requires a large investment of time 8. An analytical method with high and money. 9. This is a process of collecting a small mass of a material whose composition accurately represent the population. 10. The ultimate objective in a chemical analysis is to…

you weigh your crude sample (1.538 g) and recrystallize with hot isopropanol. How do you know how much isopropanol to add?

Question: How to get rid of colored impurities in the recrystallization process? Explain that in detail

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

Using the solubility information from your table of constants, make a flow chart, showing the procedure you would use to separate 4- chloroaniline from 1,4-dibromobenzene. Indicate what compound is in each solvent by writing the structures at the appropriate locations in the flow chart.   please answer the question, and draw the chart.

You wash a separatory funnel with soap and water to ensure it is clean before extracting an aqueous solution with dicholormethane. You should take the time to make sure there are no drops of water left inside the separatory funnel. Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a True False

A student is given an antacid tablet that weighed 5.6832g. The tablet was crushed and 4.3628g of the antacid was added to 200 mL of stimulated stomach acid. This was allowed to react and then filtered. It was found that 25 mL of this partially neutralized stomach acid required 8.50 mL of NAOH solution to titrations it to a methyl red endpoint. It took 21.54 mL of this NAOH solution to neutralize 25 mL of the original stomach acid.  a)How much of the stomach acid had been neutralized in the 25 mL sample which was titrations? (Show work) B) how much stomach acid was neutralized by the 4.3628 g sample used? (Show work)  C)How much stomach acid would have been neutralized by the original 5.6832 g tablet? (Show work)

answer both sub part to get a like.

Complete the reagent table (check procedure for acid concentration) and calculate the theoretical yield. Calculate/discuss the percent yield. How efficient was the reaction? Are there any key areas in this experiment that caused a significant drop in yield? [Discussing how product was lost in the reaction rather lost in transfer steps will get the most points here] Information: 11 mmol of 2-methylcyclohexanol. 1.3 mL of 9 M sulfuric acid. Actual Yield: 0.626 grams.

Tom, an analytical chemist, bought a bag of decaffeinated coffee from a grocery store. However,Tom suspected that he might have received regular coffee and therefore decided to analyze hiscoffee for caffeine. In the lab, he took 0.5 mL of the brewed coffee and diluted it in water tomake a 100.0 mL solution. He performed four analyses and found the concentrations to be 4.69,3.99, 4.12, and 4.50 mg/L, respectively. (Assume the density of all solutions is 1.000 g/mL,1oz= 28.35 mL).(a) Report the concentration (in mg/L) of caffeine in the brewed coffee using the format asaverage ± standard deviation. (Note this is not the concentration in the diluted solution.)(b) Look up the caffeine content of regular vs. decaffeinated coffee. Do you think that Tom wasgiven the wrong type of coffee?(c) Caffeine intake of 300 mg per day reportedly has no adverse effects in the vast majority ofthe adult population. If Tom drinks 3 cups (8 oz/cup) of this coffee daily, is his intake withinthis known safe…

Chemistry Question 2 You are developing a method for the analysis of the compounds listed below. You have a C18 column, water, methanol, and any required additives available to develop this method. You sample contains 2-methyl-pentan-1-oic acid, pentanoic acid, pentanol, and pentylamine. • Is plain water sufficient to provide reproducible methods? Why or why not? o If you have to add something to your mobile phase, what would you add and why? • What do you anticipate will be the elution order of these compounds? Why? • If I switched to a silica column with hexane as my mobile phase (assume solubility), what would be the new elution order? Why? The answers to these questions can be found in the Introduction and Mobile Phase slide

Part B: Miscibility of liquids 1. Place 10 drops of propan-2-ol into each of two DRY semi-micro test tubes. 2. Add 10 drops of water to one test tube and 10 drops of cyclohexane to the other test tube, shake and observe whether the two liquids in each test tube are miscible. Record your results then discard the contents of the test tubes into the organic waste container. 3. Place 10 drops of water in a clean semi–micro test tube and add 10 drops of cyclohexane to it. Record whether the two liquids are miscible. If two layers form (i.e. the liquids are immiscible) add a drop of blue food dye to the mixture and shake, then allow the two layers to reform. Based on your observation, decide whether the food dye is more soluble in water or cyclohexane and then discard the mixture into the non–halogenated waste container. Record whether the combinations of liquids shown below are miscible. Water Cyclohexane Propan-2-ol Cyclohexane

Organic Chemistry Laboratory purposes: a. Why is it important to vent the separatory funnel (directed away from your face and body) after vigorous shaking? b. What is an disadvantage of using too little drying agent?

Chemistry Resorcinol gives a false positive with the Duquenois–Levine test. Why?