postlab acid base extraction thomas

Benzoic acid and water were added to the test tube labeled "b.a." After stirring the mixture, sodium hydroxide (NaOH) vas added until the solid disappeared. Finally, hydrochloric acid was added drop by drop until blue litmus paper turned red. The solid present in the test tube after the addition of HCI is most likely: benzoic acid benzyl acetate O benzyl chloride sodium benzoate

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…

The amount of tartaric acid is responsible for the tartness of wine and controls the acidity of the wine.  Tartaric acid also plays a very significant role in the overall taste, feel and color of a wine.   Tartaric acid is a diprotic organic acid The chemical formula for tartaric acid is C4H6O6 and its structural formula is HO2CCH(OH)CH(OH)CO2H.   A 50.00 mL sample of a white dinner wine required 21.48 mL of 0.03776 M NaOH to achieve a faint pink color.  Express the acidity of the wine in terms of grams of tartaric acid, H2C4H4O6 (M. M.  =  150.10) per 100 mL of wine.  Assume that the two acidic hydrogens are titrated at the end point. MM H2C4H4O6 = 150.10 MM NaOH = 40.00 Below is the balanced chemical equation for this titration.

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…

Why does the dehydration of an alcohol more often use concentrated sulfuric acid,  H2SO4H2SO4, as the acid catalyst rather than dilute hydrochloric acid, HCl?   Select one or more:   Hydrochloric acid is too small to effectively react with the alcohol in the reaction.   The additional water solvent from a dilute solution could reverse the dehydration reaction.   Only acids with more than one proton can complete the dehydration reaction.   The presence of the chloride ion could result in a competing substitution reaction.

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:

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 $

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.

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

Your employer hands you a heterogeneous mixture and asks you to isolate all of thehexane that you can from it. After some analysis, you determine that the mixture contains toluene, hexane,benzoic acid, water, sodium chloride, and sand. Explain how you would isolate pure hexane from thismixture. Remember that you can use techniques such as filtration, extractions, and acid/base chemistrythat we learned earlier in this course in addition to distillation. You may need to look up solubilities and/orboiling points online to solve this problem. You only need to isolate the hexane?

Answer questions a through c: a. A CHEM 1215L student prepares a dilute solution of sodium hydroxide, NaOH(aq), starting with 6 M sodium hydroxide. She then titrates a 1.372 g sample of KHP with the dilute sodium hydroxide solution, NaOH (aq), to a phenolphthalein end point. If the titration required 21.84 mL of sodium hydroxide, NaOH(aq), calculate the molar concentration of the sodium hydroxide solution, NaOH (aq). (Remember that KHP is potassium hydrogen phthalate KHC8H4O4, NOT potassium hydrogen phosphorus!) b. The student uses the same sodium hydroxide to titrate 10.00 mL of vinegar to a phe- nolphthalein end point. If the titration required 27.48 mL of sodium hydroxide, NaOH (aq), calculate the molar concentration of acetic acid, HC2H3O2 (aq), in the vinegar.  c. Calculate the mass percent of acetic acid, HC2H3O2 (aq), in the vinegar using the mo- lar concentration for acetic acid, HC2H3O2 (aq), determined in part band assuming the density of the solution is 1.01 g/mL.

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To 20 drops of 10%NaOH, add 20 drops of dilute acetic acid. Add 5 drops of ferric chloride solution. Observe. Only the highlighted part

) 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

Submit correct and complete solutions. Please provide Explanation. Provide step-by-step detailed explanations.

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.

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 following reactions. 2CH4 (g) ⇌ C2H6 (g) + H2 (g)                    Kc = 9.5x10–13 CH4 (g) + H2O (g) ⇌ CH3OH (g) + H2 (g)  Kc = 2.8x10–21 Calculate the equilibrium constant, Kc value for the following reaction. 2CH3OH (g) + H2 (g) ⇌ C2H6(g) + 2H2O (g)

Correct each molecule in the drawing area below so that it has the structure it would have if it were dissolved in a 0.1 M aqueous solution of HC1. If there are no changes to be made, check the No changes box under the drawing area. HO—CH, но- No changes. -CH₂-CH₂- i_CH₂ C—CH₂ OH CH₂ CH₂ OH C C X Ś c+

Which set of conditions will accomplish the transformation shown below? OH OH NaOH in water (solvent), then adjust to solution pH = 6 LIAIH4 in ether (solvent), then dilute aqueous acid H2/ Pd-C in ethanol (solvent) NABH4 in ethanol (solvent)

How do you separate sodium hydroxide from the crude mixture?