Chemistry, The Central Science, Volume 1, Custom For Houston Community College

19th Edition

ISBN: 9781323850206

Author: Lemay, Bursten Brown, Woodward Murphy, Lufaso Stoltzfus

Publisher: Pearson Higher Ed

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Textbook Question

Chapter 16.4, Problem 16.6.2PE

Practice Exercise 2

In a sample of lemon juice, [H⁺] = 3.8 X 10-4 M. What is the pH?
A commonly available window-cleaning solution has [OH^-] = 1.9 X 10-6 M. What is the pH at 25⁰C.?

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Chapter 16.4, Problem 16.6.1PE

Chapter 16.4, Problem 16.7.1PE

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EXERCISE II -11 1. A chemist,, Hishes to prepare 100.0 mL of a buffer of pH 10.0000 using the base methyl amine, CH,NH2, ánd its salt, CH;NH2, and its salt, CH3NH;CI. (a) What should be the ratio of base to salt to obtain a pH of 10.00? (b) If he makes the solution 0.05000 M CH3NH2, how many moles of methyl ammonium chloride should he add to get the desired pH ? Kp = 5.00 x 104 2. A buffer solution is prepared by dissolving 4.7 g of nitrous acid, HNO2 , and 13.8 g of sodium nitrite, NaNO2, in 1.0 liter of solution. (a) Calculate the pH of the buffer. (b) Calculate the pH of the solution which results when the following are added to separate 100 mL portions of the buffer: (i) 5.0 mmol of HCI; (ii) 5.0 mmol of NaOH. Ka = 4.5 x 104 %3D 3. What change in pH will occur when 0.050 mmol of HOAC (Ka= 1.78 x 10) is added to 100.0 mL of a buffer solution that is 0.1000 M HOAC and 0.1000 M NAOAC? Assume no change in volume.

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Chapter 16 Solutions

Chemistry, The Central Science, Volume 1, Custom For Houston Community College

Ch. 16.2 - Practice Exercise 1 Consider the following...Ch. 16.2 - Prob. 16.1.2PE Ch. 16.2 - Prob. 16.2.1PE Ch. 16.2 - Practice Exercise 2 When lithium oxide (Li2O) is...Ch. 16.2 - Based on information in Figure 16.4, place the...Ch. 16.2 - Practice Exercise 2 For each reaction, use Figure...Ch. 16.3 - Practice Exercise 1 In a certain acidic solution...Ch. 16.3 - Practice Exercise 2 Indicate whether solutions...Ch. 16.3 - Prob. 16.5.1PE Ch. 16.3 - Prob. 16.5.2PE

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Practice Exercise 2 In a sample of lemon juice, [H + ] = 3.8 X 10-4 M . What is the pH? A commonly available window-cleaning solution has [OH - ] = 1.9 X 10-6 M . What is the pH at 25 0 C.?

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