Question 1 a) Benzenecarboxylic acid, commonly known as benzoic acid, has a pK, of 4.20. Find the pH of a 0.20 M solution of benzoic acid. b) Elemental analysis showed that a compound X had the empirical formula C6H7N. A simplified mass spectrum of X is shown below, together with an IR spectrum. 1.0 0.8 0.2 0.0 10 16 3500 m/2 Infrared Spectrum 2000 1500 77 1000 90 93 92 Mi: M Wy Wavenumbers (cm-1) i) Suggest chemical fragment identities for the mass spectrum peaks at m/z = 16 and m/z = 77 iv) A chemist reacted X with benzoyl chloride to produce a new organic compound, Y. Outline the mechanism of this reaction and clearly label compound Y. ii) Suggest chemical bond identities for the peaks at approx. (3400 and 3500) cm-¹ and (1500 and 1600) cm-¹. iii) Use your answers to i) and ii) to identify compound X and draw its structure. Include its IUPAC name. 10

Question 1 a) Benzenecarboxylic acid, commonly known as benzoic acid, has a pK, of 4.20. Find the pH of a 0.20 M solution of benzoic acid. b) Elemental analysis showed that a compound X had the empirical formula C6H7N. A simplified mass spectrum of X is shown below, together with an IR spectrum. 1.0 0.8 0.2 0.0 10 16 3500 m/2 Infrared Spectrum 2000 1500 77 1000 90 93 92 Mi: M Wy Wavenumbers (cm-1) i) Suggest chemical fragment identities for the mass spectrum peaks at m/z = 16 and m/z = 77 iv) A chemist reacted X with benzoyl chloride to produce a new organic compound, Y. Outline the mechanism of this reaction and clearly label compound Y. ii) Suggest chemical bond identities for the peaks at approx. (3400 and 3500) cm-¹ and (1500 and 1600) cm-¹. iii) Use your answers to i) and ii) to identify compound X and draw its structure. Include its IUPAC name. 10

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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