Ascorbic acid, H2C6H6O6, is a diprotic acid usually known as vitamin C. For this acid, pKa1 is 4.10 and pKa2 is 11.79. When 125 mL of asolution of ascorbic acid was evaporated to dryness, the residue of pure ascorbic acid had a mass of 3.64 g.Your answer is correct.Calculate the molar concentration of ascorbic acid in the solution before it was evaporated. 0.164HintYour answer is partially correct.What was the pH of the ascorbic acid solution before it was evaporated? pH = 2.44What was the concentration of the ascorbate ion, C6H6062, before the solution was evaporated?iMM

Answered: Ascorbic acid, H2C6H6O6, is a diprotic…

Chemistry: The Molecular Science

5th Edition

ISBN:9781285199047

Author:John W. Moore, Conrad L. Stanitski

Publisher:John W. Moore, Conrad L. Stanitski

Chapter10: Fuels, Organic Chemicals, And Polymers

Section: Chapter Questions

Problem 119QRT

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Explain which chemical species of ascorbic acid (C6H8O6) and citric acid (C6H8O7) are present at the following pH values: 2, 4, 6, 8, 10, 12 and 14.
What is the actual chemical component for an anthocyanin (assume a cyanidin structure), and a carotenoid (assume a lutein structure), and indicate what is the common feature of these indicators that could act as an acid or base. (While the structures are complicated molecules, compare with acetic acid, CH3COOH, a weak acid).
Aspirin can be made in the laboratory by reacting acetic anhydride (C4H6O3C4H6O3) with salicylic acid (C7H6O3C7H6O3) to form aspirin (C9H8O4C9H8O4) and acetic acid (C2H4O2C2H4O2). The balanced equation isC4H6O3+C7H6O3→C9H8O4+C2H4O2C4H6O3+C7H6O3→C9H8O4+C2H4O2In a laboratory synthesis, a student begins with 2.90 mLmL of acetic anhydride (density=1.08gml−1density=1.08gml−1) and 1.28 gg of salicylic acid. Once the reaction is complete, the student collects 1.20 gg of aspirin. a) Determine the theoretical yield of aspirin for the reaction. Express your answer using three significant figures. b) Determine the percent yield of aspirin for the reaction. Express your answer using three significant figures.
Aspirin can be made in the laboratory by reacting acetic anhydride (C4H6O3C4H6O3) with salicylic acid (C7H6O3C7H6O3) to form aspirin (C9H8O4C9H8O4) and acetic acid (C2H4O2C2H4O2). The balanced equation isC4H6O3+C7H6O3→C9H8O4+C2H4O2C4H6O3+C7H6O3→C9H8O4+C2H4O2In a laboratory synthesis, a student begins with 3.10 mLmL of acetic anhydride (density=1.08gml−1density=1.08gml−1) and 1.23 gg of salicylic acid. Once the reaction is complete, the student collects 1.22 gg of aspirin. Determine the percent yield of aspirin for the reaction. Express your answer using three significant figures.
A sample containing chlorophenol, C6H4ClOH, was analysed by gravimetric analysis. A 0.783-g of this sample goes through a chemical process allowing the chlorine in the chlorophenol to precipitate as silver chloride, weighing 0.271 g. Calculate the % (wt/wt) of the chlorophenol in the sample, assuming that chlorophenol is the only source of chlorine in the sample. Provide your answer to two decimal places and without units. Avoid using scientific notation.
Aspirin can be made in the laboratory by reacting acetic anhydride (C4H6O3)(C4H6O3) with salicylic acid (C7H6O3)(C7H6O3) to form aspirin (C9H8O4)(C9H8O4) and acetic acid (C2H4O2)(C2H4O2). The balanced equation isC4H6O3+C7H6O3→C9H8O4+C2H4O2C4H6O3+C7H6O3→C9H8O4+C2H4O2In a laboratory synthesis, a student begins with 2.90 mLmL of acetic anhydride (density=1.08g/ml)(density=1.08g/ml) and 1.22 gg of salicylic acid. Once the reaction is complete, the student collects 1.20 gg of aspirin. Determine the limiting reactant for the reaction Determine the theoretical yield of aspirin for the reaction. Determine the percent yield of aspirin for the reaction. Please help me solve this and explain this to me my math is off some way.
When aniline, C6H5NH2(Kb=7.41010) , reacts with a strong acid, its conjugate acid, C6H5NH3+, is formed. Calculate the pH of a 0.100 M solution of C6H5NH3+ and compare it with the pH of acetic acid (Ka=1.86105) .
Calculate the percent yield of ester for the esterification reaction of Isopentyl Acetate isopentyl alcohol- quantity: 3.177g acetic acid- quantity: 7mL isopentyl acetate (product)- 1.268g
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Give the definition of the inductive effect. What is the reason for its appearance in the molecule? Show the effect of the inductive effect in molecules: bromoethane CH3CH3Br; ethanol CH3CH2OH; fluoroethane CH3CH2F.
Numerous acidic species are found in living systems. Write the proton transfer equilibria for the following biochemically important acids in aqueous solution : (a) lactic acid (CH3CH(OH)COOH), (b) glutamic acid (HOOCCH2CH2CH(NH2)COOH), (c) glycine (NH2CH2COOH), (d) oxalic acid(HOOCCOOH).
What is the Kw of pure water at 15.0 C if the pH is 7.20? a. 6.31 x 10^8 b. 1.26 x 10^-14 c. 3.98 x 10^-15 d. 1.26 x 10^-7 e. 1.00 x 10^-14

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