Principles of Modern Chemistry
8th Edition
ISBN: 9781305079113
Author: David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Publisher: Cengage Learning
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Chapter 15, Problem 88AP
Interpretation Introduction
Interpretation:
The solution is prepared from 0.23 mol of HF and 0.57 mol of HClO which is dissolved in 3.60 L of water. The pH of stronger acid and equilibrium concentration of HF, F-, HCO and ClO- should be determined.
Concept Introduction:
pH is used to determine the concentration of solution.
The ratio of mole to the volume of solution is known as concentration.
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Calculate the pH of a solution that is prepared by dissolving 0.23 mol of hydrofluoric acid (HF) and 0.57 mol of hypochlorous acid (HClO) in water and diluting to 3.60 L. Also, calculate the equilibrium concentrations of HF, F-,HClO, and ClO2. (Hint: The pH will be determined by the stronger acid of this pair.)
Determine the pH of a 0.18 M solution of pyridinium nitrate (C5H5NHNO3) at 25
°
C. [Pyridinium nitrate dissociates in water to give pyridinium ions (C5H5NH+), the conjugate acid of pyridine
(Kb = 1.7
×
10−9),
and nitrate ions (NO3−).] pH =
The acidity or alkalinity of a solution is defined by pH = –log[H+] where [H+] is the hydrogen ion concentration, measured in moles per liter.
Solutions with a pH value of less than 7 are acidic; solutions with a pH value of greater than 7 are basic and solutions with a pH of 7 (such as pure water) are neutral.
Suppose that you test apple juice and find that the hydrogen ion concentration is [H+] = 0.0003.
Find the pH value and determine whether the juice is basic or acidic.
You test some ammonia and determine the hydrogen ion concentration to be [H+] = 1.3 × 10–
9. Find the pH value and determine whether the ammonia is basic or acidic.
Chapter 15 Solutions
Principles of Modern Chemistry
Ch. 15 - Vitamin C is ascorbic acid (HC6H7O6), for which Ka...Ch. 15 - Suppose a 0.100 M solution of each of the...Ch. 15 - Sulfanilic acid (NH2C6H4SO3H) is used in...Ch. 15 - Phthalic acid ( H2C8H4O4, abbreviated H2Ph ) is a...Ch. 15 - Prob. 88APCh. 15 - Prob. 94APCh. 15 - Prob. 100APCh. 15 - Prob. 102AP
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- Consider the following ions: NH4+, CO32, Br, S2, and ClO4. (a) Which of these ions in water gives an acidic solution and which gives a basic solution? (b) Which of these anions will have no effect on the pH of an aqueous solution? (c) Which ion is the strong base? (d) Write a chemical equation for the reaction of each basic anion with water.arrow_forwardDetermine the pH of a 0.650 M solution of magnesium nitrite, Mg(NO2)2 at 25 °C. A solution containing 7.50 g of this salt is diluted with water until it reaches a pH of 8.18.What is its final volume? Give one example of a salt whose solution is expected to be acidic and briefly explain why. Give one example of a salt whose solution is expected to be basic and briefly explain why. You cannot reuse the compound in a) and b) to answer c) and d).arrow_forwardLactic acid, HC3H5O3, is a weak acid; write an equation for its ionization in aqueous solution. If 0.15 M solution of lactic acid has pH = 2.34, calculate the molar concentration of H3O+in the solution. What are the Ka of lactic acid and the degree of ionization of the acid?arrow_forward
- Consider the following data on some weak acids and weak bases: acid base Bo K. K, name formula name formula hydrofluoric acid HF 6.8 × 10 hydroxylamine HONH, |1.1 x 108 hypochlorous acid HСIO |3.0 х 10 methylamine CH;NH2|4.4 × 10 Use this data to rank the following solutions in order of increasing pH. In other words, select a '1' next to the solution that will have the lowest pH, a '2' next to the solution that will have the next lowest pH, and so on. solution pH 0.1 M NaF choose one v 0.1 М CНзNHзBr choose one 0.1 M NaI choose one ♥ 0.1 M HONH3CI choose one varrow_forwardThe equilibrium constant for an acid is called the acid ionization constant (Ka). If acetic acid (weak acid, HC2H3O2) is placed into water, it ionizes to H+ and C2H3O2- with a Ka of 1.82 x 10-5. Determine the pH of the solution when 20.0 g HC2H3O2 (s) is added to water, with a final volume of 1000. mL?arrow_forwardDetermine the pH of a 0.13 M solution of pyridinium nitrate (C5H5NHNO3) at 25°C. [Pyridinium nitrate dissociates in water to give pyridinium ions (C5H5NH+), the conjugate acid of pyridine (Kb = 1.7 ×10−9), and nitrate ions (NO3−).]arrow_forward
- Consider the following data on some weak acids and weak bases: acid base Bo Ka K, name formula name formula acetic acid HCH,CO, 1.8 × 10 -, methylamine CH;NH, 4.4 x 10 -4 HNO, 4.5 x 10 4 ethylamine C,H,NH, 6.4 x 10 * -4 nitrous acid Use this data to rank the following solutions in order of increasing pH. In other words, select a '1' next to the solution that will have t the solution that will have the next lowest pH, and so on. solution pH 0.1 M CH3NH3CI choose one v 0.1 M NANO2 choose one v 0.1 M KCH3CO2 choose one v 0.1 M C2H5NH3Br choose one v Explanation Check O 2022 McGraw Hill LLC. All Rights Reserved. T 回 0中g W DELLarrow_forwardA chemist dissolves 700. mg of pure sodium hydroxide in enough water to make up 60. mL of solution. Calculate the pH of the solution. (The temperature of the solution is 25 °C.) Be sure your answer has the correct number of significant digits. ☐ ×10arrow_forwardThe ka of an unknown acid, HYO₂, is determined to be 5 x 10⁻² empirically. What is the pH of a 0.1 M solution of HYO₂?arrow_forward
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