Part 4. Butanoic acid (ka= 1.52× 10-5) has a partition coefficient of 3.0 (favors benzene) when distributed bet.water and benzene. What is the formal concentration of butanoic acid in each phase when0.10M aqueous butanoic acid is extracted w❘ 25 mL of benzene100 mL ofa) at pit 5.00b) at pH 9.00

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Answered: Part 4. Butanoic acid (ka= 1.52× 10-5)…

Principles of Modern Chemistry

8th Edition

ISBN:9781305079113

Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler

Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler

Chapter20: Molecular Spectroscopy And Photochemistry

Section: Chapter Questions

Problem 67CP

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Hexanoic acid was added to an immiscible biphasic solvent system, water and CCl4 at 20.0OC and the equilibrium concentrations of hexanoic acid were determined to be 3.66 g/L in H2O and 67.0 g/L in CCl4. Caluclate the distrubution coeffiecent (D2) of hexanoic acid in water with respect to CCl4.
Complete the Ka2 expression for H₂CO3 in an aqueous solution. K₁2 = 4.69 x 10-11 = [HCO3] [CO] Answer Bank [H₂0†] [H₂CO3] [H₂O+1²
2. If 6 g of phenol (weak acid, pKa 9.9) is distributed between 100 mL of an aqueous buffered solution at pH 5 and 150 mL of mineral oil, how much phenol is left in the mineral ail layer? The partition coefficient for phenol in this system is 2.3.
Complete the Kal expression for H₂CO3 in an aqueous solution. Kal = 4.45 x 10-7 = [H₂CO3] [H3O+] Answer Bank [HCO3] [H₂0+1² [CO]
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25.0 cm3 of sodium hydroxide solution is tritrated against 0.2 mol dm–3 hydrochloric acid until the indicator just changes colour. 27.5 cm3 of the acid are required to reach the end point.Phenolphthalein is used as an indicator in the above experiment. What will be its colour change at the end point? From pink to yellow From pink to colourless From yellow to colourless From yellow to pink
1. What is the molar solubility of PbCl2 in a solution of 0.23 M CaCl2? Ksp = 1.6 ✕ 10-5 for PbCl2. 2. What is the Qsp when 32.0 mL of 6.50 ✕ 10-7 M Na3PO4 are mixed with 41.4 mL of 5.50 ✕ 10-5 M CaCl2? Assume the volumes are additive. Ksp = 2.0 ✕ 10-29. 3. What is the Qsp when 61.0 mL of 1.50 ✕ 10-4 M AgNO3 are mixed with 80.0 mL of 5.20 ✕ 10-3 M CaCl2? Assume the volumes are additive. Ksp = 1.6 ✕ 10-10. 4. What [I-1] is needed to start the precipitation of AgI from a saturated solution of AgCl? Ksp = 2.9 ✕ 10-16 for AgI and Ksp = 1.2 ✕ 10-10 for AgCl.
Complete the flow chart below to describe the separation of an acid and base mixture by providing the necessary chemical structures.
4. To perform a certain activity assay it is necessary to have 0.25 mL of an enzyme at a concentration of 0.2 mgml¹ in the presence of 0.4 mM substrate and 200 mM NaCl in a suitable buffer. The stock solutions of enzyme, substrate and NaCl are 4 mgmL-¹, 40 mM and 1 M all in the same type of buffer. What volumes of the stock solutions and buffer are required for each assay?
5) Calculate the molar solubilities of CuS in pH = 1 and pH = 4 containing H2S. Kccus=6,0x10 30 [H+][HS¯] H2S→H*+HS° Ka1=5.7x10 8= [H2S] [H*][S?-] [HS¯] HSH*+s2- Ka2=1.2x1015= Ka1.Ka2=6.8X10-23_[H*]°[S²] [H2S] H2S→2H*+s?-
How do I prepare these solutions? I do not know what volumes or molarities to be added from the initial step. Thank you. 1. Prepare a fresh stock solution of 50 cm3of 0.2% ascorbic acid. 2. Prepare 5 standard solutions of ascorbic acid in volumetric flasks of 25 cm3. 3. To each volumetric flask add 0.5 cm3 of 0.5M acetate buffer and different volumes of 0.2% ascorbic acid to make 0.01 mM, 0.02 mM, 0.03 mM, 0.04 mM and 0.05 mM solutions. Dilute to the mark with distilled water.
grammarly-G X * Content oard.odu.edu/ultra/courses/_393452_1/cl/outline F2 Question Completion Status: X GA student wan X 1 QUESTION 3 A student wants to determine the solubility of water and copper (1) bromide (a green solid) in ethyl acetate (a colorless organic liquid). She places 1 mL of ethyl acetate into each of two test tubes. To one, she adds 5 drops of water to it. To the other, she adds a small scoop of copper(1) bromide. 8.0 F3 2 - Which test tube represents the ethyl acetate and A. Test tube 1 copper(1) bromide if the copper(1) bromide is insoluble in ethyl B. Test tube 2 acetate? C. Test tube 3 D. Test tube 4 - Which test tube represents the mixture of the ethyl acetate and water if the water is insoluble in ethyl acetate? $ Question Com X C Chegg Search x 3 Which test tube represents the mixture of the ethyl acetate and water if the water is soluble in ethyl acetate? - Which test tube represents the ethyl acetate and copper(1) bromide if the copper(1) bromide is soluble…

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