This is a worksheet lab - there is no prelab and lab write up is not required Complete the following three tasks below. a. Find the approximate pKa value for each compound in the table below and draw the structure of each compound and its conjugate base. b. Circle the form (the acid or the base) that predominates at a pH of 7. C. Write whether the predominate form would be more water soluble or more organically soluble. (You do not need to show any calculations for this question) Nitric Acid Acetic Acid Hydrocyanic Acid pka = = pKa Carbonic Acid pKa (1)= (-36 pKa (2) = 10.33 oka = o

This is a worksheet lab - there is no prelab and lab write up is not required Complete the following three tasks below. a. Find the approximate pKa value for each compound in the table below and draw the structure of each compound and its conjugate base. b. Circle the form (the acid or the base) that predominates at a pH of 7. C. Write whether the predominate form would be more water soluble or more organically soluble. (You do not need to show any calculations for this question) Nitric Acid Acetic Acid Hydrocyanic Acid pka = = pKa Carbonic Acid pKa (1)= (-36 pKa (2) = 10.33 oka = o

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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Which of the following acid/conjugate base pairs has a pKa value of 9.44? A. Ammonium/ammonia B. carboxylic acid/carboxylate C. imidazolium/imidazole
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3. When an acid is neutralized by a base in the presence of phenolphthalein, a faint purple-pink color is observed at the end point; however, after a few minutes, the solution becomes colorless. a. What can you say about the solution when it has a faint purple-pink color? What must have changed about the solution for the color to go away? Assume that the phenolphthalein is still present. b. The cause of the change is the carbon dioxide that is in the air. Rising levels of CO2 in the atmosphere pose serious concerns not only for the temperature of the earth, but also a process known as ocean acidification. What is ocean acidification, and why is it a concern? 8/16/2023
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Given the structures of cocaine (right) and its free base (left) below: a. Would you expect K for the cocaine to be greater or less than 1.0? Explain. b. Would K for the free base be higher or lower than for cocaine? Explain. c. To favor the equilibrium towards the free base, would you make the aqueous solution acidic or basic? Explain. (Hint: think of Le Chatelier’s principle).
Consider the structure of an acid. Draw the conjugate base. Add charges and non-bonding electrons where appropriate. Select Draw Templates More Erase NH3 C H N
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