postlab acid base extraction thomas

You have a solution of the three molecules below in a suitable organic solvent. NH₂ ملو OH In addition to the organic solvent and the three molecules, you have access to the following solutions: 1 M NaOH 1 M HCI 1 M CH3COOH 1 M Na2HPO4 Outline a method for how you would separate this solution into its component parts and briefly explain your rationale. You do not need to provide the level of detail shown in the Experimental; just the basics will be sufficient (e.g. wash with _____ to separate component __, then wash with _____ to separate component Y, etc.). Hint: you might need to search their pką values! You can write in paragraph style or organize your steps in a numbered list. 111)

A student dissolved 4 drops of an unknown compound in 1 mL of methylene chloride (dichloromethane) in a test tube. They added 5 drops of a 2% solution of bromine in dichloromethane dropwise and mixed the contents within the test tube gently. They observed the red-brown color discharges (turns colorless) until the last drop. What compound is most likely the unknown? ©GMU 2020 Oa. Methanol b. Cyclohexane c. n-Butyl Bromide O d. Hex-2-ene COLE QUESTION 6 A student placed 2 drops of an unknown sample in a test tube and added 2 mL of ethanol to the test tube while mixing gently. They added 2 drops of potassium permanganate reagent to the test tube and mixed the contents of the test tube gently. The initial color was a deep purple but then changed to a yellow color which precipitates as a brown solid. What compound is most likely the unknown? OGMU 2020 a. Cyclopentane O b. Cyclohexene c. 1-Pentyl Chloride d. 2-Propanol SOUL QUESTION 7 A student performed the Beilstein test within a chemical…

Based on the informaton presented below, answer the following questions. An ether solution contains the following components. 2,3,4,5-tetramethylbenzene benzyl alcohol 2-hydroxybenzoic acid This solution is extracted with a 1.0 M solution of NaOH, that is immiscible with ether. The 2-hydroxybenzoic acid will be recovered from the layer.

Complete the balanced chemical reaction for the following weak base with a strong acid. In this case, write the resulting acid and base as its own species in the reaction.

Phenol is a functional group that is readily ionized by adjusting the pH of the aqueous solution during an extraction. What is the neutral and ionized form? How do you convert the neutral to the ionized form?

Part A The chemical 5-amino-2,3-dihydro-1,4-phthalazinedione, better known as luminol, is used by forensic scientists in analyzing crime scenes for the presence of washed-away blood. Luminol is so sensitive that it can detect blood that has been diluted 10,000 times. A basic solution of luminol is often sprayed onto surfaces that are suspected of containing minute amounts of blood. The forensic technician at a crime scene has just prepared a luminol stock solution by adding 15.0 g of luminol into a total volume of 75.0 mL of H2O. What is the molarity of the stock solution of luminol? Express your answer with the appropriate units. Luminol has a molecular weight of 177 g/mol. • View Available Hint(s) HẢ molarity of luminol solution = Value Units Submit Part B Before investigating the scene, the technician must dilute the luminol solution to a concentration of 6.00x10-2 M. The diluted solution is then placed in a spray bottle for application on the desired surfaces. How many moles of…

O ACIDS AND BASES Calculating percent dissociation of a weak acid Calculate the percent dissociation of trimethylacetic acid (C4H,CO₂H) in a 0.26 mM aqueous solution of the stuff. You may find some useful data in the ALEKS Data resource. Round your answer to 2 significant digits. % Explanation Check 0 X » ZUZZ MILOTOW LLC. All Rights Reserved. Terms of Use | Privacy Center Acce

How can we obtain the boiling point using table 1 and table 2? And how can we identify the compound using the obtained boiling point? Show formula, solution, and explanation.

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Let's imagine that in a drug design project a problem is encountered with the low water solubility of a lead compound. The compound has the low melting point of 41-43°C, and a log P value of 4.95. The compound does not possess any ionizable basic or acidic functional groups. Suggest two kinds of modification that the design team could introduce to increase the water solubility of the lead compound. Modification 1: Modification 2:

Blank 1 is an intensive property that is the basis of fractional distillation. Blank 1 Add your answer

Calculate the pH at 25 °C of a 0.32M solution of trimethylammonium chloride ((CH3)2NHCI). Note that trimethylamine ((CH3)3N) is N is a weak base with a pK of 4.19. Round your answer to 1 decimal place. = 0 pH =

In a 0.73 mM aqueous solution of trimethylacetic acid (C₂H₂CO₂H), what is the percentage of trimethylacetic acid that is dissociated? You can find some data that is useful for solving this problem in the ALEKS Data resource. Round your answer to 2 significant digits. 1% 00 x10 X $

You have already dissolved the reagent in distilled water, although the pH is less than the target pH. What accounts for this discrepancy in pH?

please give me step-by-step solution and circle answer please

5. If the concentrated phosphoric acid (H3PO4) is 15.2 M, determine the molar ratio of H3PO4 to cyclohexanol, if one used 9.13 g of cyclohexanol and 4.0 mL of H3PO4. Show your calculations. Was cyclohexanol or H3PO4 the limiting reagent? Briefly explain.

11-5. Write the stepwise acid-base reactions for the following species in water. Write the correct symbol (for example, Kb) for the equilibrium constant for each reaction and find its numerical value. HN NH Piperazine CO₂ CO Phuthalate jon

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How to get the boiling point using the temperatures on table 1 and how to identify the compound using the melting points on table 2? Show solution and explanation.

CARBON 5 1 H 1.008 Circle and name ALL the functional groups in this molecule HO O 6 с 12.01 CH 3 | но H 1 C-C-C-C-N | || | OH Indicate which carbon/s in the molecule would be asymmetric What is the molecular formula of this molecule: Draw the group that serves as an ACID and show it in ionized form There are two groups that can become IONIZED (lose or gain H*). H/ I H Draw the group that serves as an BASE and show it in ionized form

For the acid-base reactions below, fill in the boxes by providing the structure of the conjugate base or conjugate acid, and estimating the value of the equilibrium constant, Keq. ' + SH 요 요 ее в осно + Kea но = Kea = Keq = рказ = 5 + CH3OH + H₂ + pka = 35

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…

please give handwritten

) Physical Properties of Alcohols and Phenols pt Unknown # Choose... Fill in the table with data collected BIIIU X2 | X² | → EEE fx | ®I D Normal Alcohol pH Soluble in Water? Ethanol 2-Propanol 2-Methyl-2-propanol Cyclohexanol Phenol Unknown

Organic Qualitative Analysis Unknown Compound Results and Identification: Trace the route on the flow chart below using different colors for the 3 different unknowns. Also, fill in the blanks on the flow chart with the color of the products. All functional Groups Insoluble Soluble Solubility Test pH test Beilstein Test Negative Acidic Neutral Basic Positive Alkyl Halide Amine Baeyer Test Color: Feas Test Ceric Nitrate Negative Positive Test Negative Carboxylic Acid Positive Alkane Alkene Phenol Positive Color: Color: Color: Negative Alcohol Color: Color: Baeyer Test Negative Ketone Positive Aldehyde Color: Color:

Find the pH of a solution 1.6 M in ethylamine CH3CH2NH2. For CH3CH2NH2  Kb=5.6x10-4. Report your answer to two decimal places.

You have a mixture of an aryl halide and a carboxylic acid that you wish to separate (both are solids). Both are soluble in diethyl ether. Explain ALL the steps you would take to obtain the two compounds in pure form from your sample.

You have a mixture of an aryl halide and a carboxylic acid that you wish to separate(both are solids). Both are soluble in diethyl ether. Explain ALL the steps you would take to obtain the two compounds in pure form from your sample.

A mixture is made up of low molecular weight carboxylic acid, alcohol and ester. What one step procedure can you use to extract the ester component from the mixture? Describe the process briefly

You are looking at extracting a pyridine-bearing compound (conjugate acid pKA-4) from an organic phase and transfer it to the aqueous phase. Which of the following aqueous solutions can you use to do so? IM NGOH,pH 14 water, pH 7 saturated NH4Cl,pH 5 1MHCl, pH 1

Consider the equilibration of a weak base B (K₁ = 5.57 x 10-5) between water (phase 1) and benzene (phase 2). Which expression represents D, the distribution ratio? B represents the unprotonated form of the base and BH+ represents the protonated form of the base. O [B] 2 [B]₁ [BH+]2 [B]₁ + [BH+]₁ [B]2 [B]₁ + [BH+]₁ O [BH+]2 [BH+]₁ D= Calculate D at pH 8.43 if Kp = 44.0. Which expression represents Kp, the distribution constant? B represents the unprotonated form of the base and BH represents the protonated form of the base. [B]2 [B]₁ [B]2 [B]₁ + [BH+]₁ [BH+]2 [B]₁ + [BH+]₁ [BH+]2 [BH+]₁ Will D be larger or smaller at pH 7.00 than at pH 8.43? omaller