Chemistry: The Molecular Nature of Matter

7th Edition

ISBN: 9781118516461

Author: Neil D. Jespersen, Alison Hyslop

Publisher: WILEY

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Textbook Question

Chapter 16, Problem 166RQ

What conjugate acid-base pairs are used to buffer (a) over-the-counter drugs, (b) foods, (c) cosmetics, and (d) shampoos?

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Chapter 16, Problem 165RQ

Chapter 16, Problem 167RQ

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Sodium hypochlorite solution is also known as bleach. It contains the hypochlorite ion ClO-. (a) Write an equation for the reaction between hypochlorite ion and ammonium ion. Label the acids and bases in the forward and reverse reactions. Identify the two conjugate acid-base pairs. (b) This equilibrium favors the reactants. Which of the acids is stronger and donates protons more readily?

Acidity of a solution is determined by the concentration H of hydrogen ions in the solution (measured in moles per liter of solution). Chemists use the negative of the logarithm of the concentration of hydrogen ions to define the pH scale, as shown in the following formula. pH = -log (H) Lower pH values indicate a more acidic solution. (a) Normal rain has a pH value of 5.6. Rain in the eastern United States often has a pH level of 3.8. How much more acidic is this than normal rain? (Round your answer to two decimal places.) 63.10 times as acidic as normal rain (b) If the pH of water in a lake falls below a value of 5, fish often fail to reproduce. How much more acidic is this than normal water with a pH of 5.6? (Round your answer to two decimal places.) * times as acidic as normal water

The pH of saliva is normally in the range of 6.4 to 7.0. However, when a person is ill, the person's saliva becomes more acidic. (a) When Marco is sick, he tests the pH of his saliva and finds that it is 5.7. What is the hydrogen ion concentration of his saliva? (Round your answer to seven decimal places.) M(b) Will the hydrogen ion concentration in Marco's saliva increase or decrease as he gets better?

Chapter 16 Solutions

Chemistry: The Molecular Nature of Matter

Ch. 16 - Prob. 1PE Ch. 16 - Practice Exercise 16.2 An aqueous solution of...Ch. 16 - Practice Exercise 16.3 Water draining from old...Ch. 16 - Because rain washes pollutants out of the air, the...Ch. 16 - Practice Exercise 16.5 Find the values of and ...Ch. 16 - Practice Exercise 16.6 Calculate the . (Hint: is...Ch. 16 - Practice Exercise 16.7 Calculate the , and pH in a...Ch. 16 - For each of the following acids, write the...Ch. 16 - For each of the following acids, write the...Ch. 16 - Practice Exercise 16.10 Use Table 16.2 to find all...

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