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Q: Reduction of Vanilin What is the limiting reagent in this reaction? Is it ok to use Lithium…
A: 1.1 mole NaBH4 contains 4 reactionable hydrogen.Molar ration of vaniline:NaBH4 =4:1.1mole NaBH4…
Q: You and your lab partner are monitoring a reaction via TLC. Upon spotting and running the plates,…
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Q: 2 is corrosive, so purging with N2. which is inert, helps to reduce reactivity within the…
A: Infrared spectroscopy is being used to identify the organic compounds by recognizing the functional…
Q: Why do you need to soak the nichrome wire in a concentrated HCl? What is the implication of the…
A: Flame Photometry - It is the branch of spectroscopy in which the species are examined in the…
Q: Anna has a solid sample and did use an aqueous solvent to dissolve it. She observed that some of her…
A: It is very crucial to take a suitable solvent for dissolution while performing any analytical…
Q: 1. How does sodium 2-phenylphenolate react with acid and/or base? Draw the acid-base reaction (with…
A: This is a normal acid base reaction in which phenolate is the base and that of H+ is acid, so base…
Q: What volume of ethanol is required, per gram of benzil, to generate a solution with a concentration…
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Q: n the blueprint expreiment, what would happen if you did not allow the paper to dry for 20 minutes…
A: The blueprint process was invented by the astronomer John Herschel in 1842. This works on the…
Q: would it be a problem to use an ink pen or a marking pen instead of a pencil, as directed in step 1…
A: question - would it be a problem to use an ink pen or a marking pen instead of a pencil, as directed…
Q: Using Table 6, calculate absolute errors in energy differences (in kJ mol-¹) for both methods in the…
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Q: Why does phenol red have 2 molar extinction coefficient values?
A: Since you have asked multiple questions, we will solve the first question for you. If you want any…
Q: It's important to mark the solvent front with a pencil after the plate is finished being developed…
A: It's important to mark the solvent front with a pencil after the plate is finished being developed…
Q: What is the Rf value for a compound if it moves 3.0 cm from the origin when the initial spot is…
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Q: What is the n-factor (valency factor) of Silver Nitrate (AgNO3)? please also help me with this,…
A: n factor (valency factor ): It is the factor by which oxidation number of the specified element…
Q: Between Whatman No. 1 filter and 3% KCI solution, which is more polar?
A: Polar compound are those in which there is electronegativity difference between the atoms.
Q: 9) If you inject your sample into the GC and wait several minutes but there is no peak (at all, not…
A: The technique through which the components of a mixture are separated using different affinities of…
Q: 10. Which of the following structures is not a good chromophore? a. O'Na" so, Na* b. C. d. e. All of…
A: Concept: Chromopher: A chromophore is the section of a molecule that causes us to see color. The…
Q: Is the circled function group an activator or deactivator during SeAR ? Discuss and illustrate…
A: The circled group is -NH- group, which is attached to the benzene ring. In the -NH- functional…
Q: why there aren‘t three spots for hexabe and ethyl acetate，and why this indicates dichloromethane is…
A: Concepts of chromatography.
Q: hat is the purpose of adding CaCO3 or NaHCO3 in the Mohr Method determination of chloride? Than
A: the answer is as follows:
Q: directly analyse a solid sample with AAS, which method will you prefer? Explain this.
A: Follow the explanation for to understand and chose the method for solid sample analysis.
Q: 13. Is the contact area greater for 1 cube with sides of 2cm or for this same cube divided into 10…
A: The cube divided into 10 small pieces will react faster as surface area will increase.
Q: EXPERIMENT : Estimation of Free Chlorine I want full Theoretical Background for this experiment
A: The atomic number of chlorine is 17. Chlorine is used as disinfectant for cleaning tap water.…
Q: . How does sodium 2-phenylphenolate react with acid and/or base? Draw the acid-base reaction (with…
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Q: In order to analyse mercury with AAS, which method will you prefer?
A: Explaination as below
Q: 8. A student was asked to find the acid and basic radicals in six simple salts provided to him…
A: Since you have posted a question with multiple sub-parts, we will solve first three subparts for…
Q: For each reagent calculate the moles with the given information.2-bromoaniline with a molecular…
A: Given, molecular weight of 2-bromoaniline = 172 g/mol , density of 2-bromoaniline = 1.56 g/ml Volume…
Q: What effect will happen to the volume needed to reach bromocresol green end point, if Na2CO3 was…
A: Bromocresol green(BCG) endpoint is obtained for the conversion of NaHCO3 to H2CO3 (CO2+H2O). The…
Q: 10. What can you conclude from a student who reported an Re value of 1.2? 11. An unknown has two…
A: Since you have asked multiple questions, we will solve the first question for you. If you want any…
Q: I need to write about the mechanism and how it happens in this lab please help me explain what…
A: In the above reaction hydroboration takes place where CHO group reduced to -CH2OH.
Q: A neutral compound has a partition coefficient of 7 between ether and water. What percentage of the…
A: Partition coefficient (K) = Kether/ Kwater = 7 Let initial amount f substance = W gram After…
Q: Which of the following Lineweaver-Burk parameters does not change when inhibitor X is added to the…
A: The Lineweaver–Burk plot can distinguish inhibitors (competitive, non-competitive and…
Q: How can you check that there is no more vanillin left in the organic layer after it has been…
A: Beer-Lambert's law is the direct relation of any species present in the solution. It states that at…
Q: What error is introduced into the determination of an Rf value if the top is left off the developing…
A: In chromatographic technique, the components of a mixture are separated by using a developing…
Q: If Josuke Higashikata used a burette to measure the volume of a substance he needed to react with…
A: In Electro analytical method, the potential and voltage of the analyte ( substance whose…
Q: Please help 1. Why should you never create the filter paper as you fold it? 2. Fill in the blank…
A: So the answer as follows :
Q: What property determines which layer is on top or bottom in an extraction?
A: Since you have asked multiple question, we will solve the first question for you. If you want any…
Q: What procedures should be done to guarantee that the calibration curve is accurate?
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Q: How would you determine if biphenyl was produced in your reaction? would it be in IR and how would…
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Q: Sodium hydroxide and Hydrochloric acid mixture If concentrated nitric acid were used in…
A: Hydrochloric acid : HCl Nitric acid : HNO3
Q: A student uses exactly 15 mL of a 1M sodium hydroxide solution when setting up their azo coupling…
A: Given:
Q: Why do we use a salt bridge during calomel measurement
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Q: Synthesis of Orange II dye.
A: Orange II Synthesis a. Cool 10 mL of 10% NaOH in a 400 mL beaker. Add 1.8 g of 2-naphthol to this…
Q: Do your results agree with the predicted isomer distribution on the basis of the knowledge of the…
A: Dehydration reaction is the type of reaction in which water is removed and unsaturated compound is…
Q: Explain what the purpose of Step 3 (shown in bold-face) was in the work-up.
A: The MTBE is having trace amount of OHCl and acetic acid. MTBE is washed using aq K2CO3 to remove…
Q: what will produce a smaller Rf value if the solvent and paper are both changed?
A: Increasing the polarity of solvent will result in increase in Rf value as the compound in even for…
Q: STARTING WITH 18MG OF 2-methyl-2-butanol JUST B PLEASE (b) theoretical volume of alkene mixture…
A: Given that - Mass of reactant 2-methyl-2-butanol = 18 mg = 0.018 g Now, 0.018 g reactant gives -…
Q: 2 Perform theoretical IR and NMR analysis on paracetamol. Summarize your ideas in 2 charts.
A: Infra-red spectroscopy of an organic molecule involves the application of radiation in the infra-red…
Q: If we give same sample to three different students in the same lab, why the result of melting point…
A: Melting point is the temperature at which the solid substance melts and converted into liquid phase.…
Explain the purpose of the desiccator. How would your results differ if you didn’t use it?
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- If a mixture was prepared by diluting 7.0 mL of the Blue#1 solution with water to a final volume of 10.0 mL and mixing this with 2.0 mL of diluted bleach how many seconds would it require for the mixture to have an absorbance of 0.120? Use your measured values of b and of the average rate constant, k’ to answer this question. Show all work. Pls help me out asap!!What may be the complications in doing nitrous acid test and how will it be resolved?Fill in the blanks. For the first one it is an example on how to do it .
- How do you solve this problem? Can you explain step by step with details on why you did what you did?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…Answer number 9 to 11 pls. I don't want to waste my money here.
- If 100 ml of a 1:1500 methylbenzethonium chloride lotion is diluted with an equal volume of water, what will be the ratio strength of this dilution? O a. 1:67 O b. 1:100 OC. 1:6000 O d. 1:3000 O e. 1:15000We are stuck on 9. We get how Q is 16 and rxn goes left. at eq 2+ x. 2 + x. -2 x We get x= 1. Therefore k = 4. Please help us. Questin 9. See conditions from 8 This is not a graded question as it is a practice question . I am 60 years old and helping my son prepare for the AP exam in a few months. We do questions at the back of the textbook by Zumdahl and ZumdahlYour task is to measure the volume of blood in a full-grown living Tyrannosaurus Rex found in Jurassic Park. One way to do this would be to drain its blood into a suitable container. Aside from the harmful side effect which this method has on the theoretical T-Rex, it will not be successful, as blood will still remain behind in the tissues. Therefore, we will inject 12.0 mL of a 0.0750M solution of dye into the head which the T-rex will not appreciably metabolize or excrete in one hour and then measure the concentration of this dye in the bloodstream after it has diluted in the blood (our sample being taken from the tail after 30 minutes, a sufficient time to thoroughly mix the dye in the bloodstream.) The dye at this point is 5.28 x 10-6 M. What is the volume in LITERS of the blood in the T-rex? Please Show Work
- Tabulate five advantages and limitations of microwave acid digestion over hot plate acid digestion sample preparation methods prior to spectroscopic metal detection.Please I really need you help on this, take your time to look at this problem carefully, I will appreciate it!A solution of potassium permanganate of unknown concentration was analyzed against a standard of various concentrations. Table 1. Data for Standard Calibration Curve Absorbance at 525 nm Potassium permanganate Standard (mol/Liter) 0.00040 0.104 0.00080 0.258 0.00120 0.453 0.00160 0.682 0.00200 0.894 What is the concentration of potassium permanganate if its absorbance is 0.465? none of the above 0.00137 M KMnO4 O 0.00155 M KMnO4 0.00117 M KMnO4 0.00153M KMnO4