Explanation Given: The pH of the solution is 9 .29 . The given solution of NaA is assumed to be completely dissociated into Na + and A − . Na + is a group I cation and does not react with water therefore do not alter the value of pH . The A − ion is a weak base and it reacts with water to give HA . The reaction of A − with water is water to give HA is, A − ( a q ) + H 2 O ( a q ) ⇌ HA ( a q ) + OH − ( a q ) Formula used: At equilibrium, the equilibrium constant expression is expressed by the formula, K a = Concentration of products Concentration of reactants Where, K a is the acid dissociation. The relationship between equilibrium constant of conjugate acid and conjugate base is, K w = K a × K b Where, K b is the ionization constant. K a is the dissociation constant. K w is the ionic product of water Calculation: The equilibrium constant expression for the above reaction is, K b = [ OH − ] [ HA ] [ A − ] ....(1) The pH of the solution is 9 .29 . The value of pOH is calculated by the formula, pOH = 14 − pH =14 − 9 .29 =4 .71 The value of pOH is calculated by the formula, pOH = − log [ OH − ] Rearrange the above expression to find the value of [ OH ] . [ OH − ] = 10 − pOH Substitute the value of pOH in the above expression, [ OH − ] = 10 − pOH [ OH − ] = 10 − 4

Chemistry: The Central Science (13th Edition)

13th Edition

ISBN: 9780321910417

Author: Theodore E. Brown, H. Eugene LeMay, Bruce E. Bursten, Catherine Murphy, Patrick Woodward, Matthew E. Stoltzfus

Publisher: PEARSON

See similar textbooks

Concept explainers

Ionic Equilibrium

Chemical equilibrium and ionic equilibrium are two major concepts in chemistry. Ionic equilibrium deals with the equilibrium involved in an ionization process while chemical equilibrium deals with the equilibrium during a chemical change. Ionic equilibri…

Arrhenius Acid

Arrhenius acid act as a good electrolyte as it dissociates to its respective ions in the aqueous solutions. Keeping it similar to the general acid properties, Arrhenius acid also neutralizes bases and turns litmus paper into red.

Bronsted Lowry Base In Inorganic Chemistry

Bronsted-Lowry base in inorganic chemistry is any chemical substance that can accept a proton from the other chemical substance it is reacting with.

Videos

Question

Chapter 2, Problem 86E

Interpretation Introduction

To determine: The value of Ka for the parent acid HA .

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Chapter 2, Problem 85E

Chapter 2, Problem 87AE

Students have asked these similar questions

How would you prepare 1 liter of a 50 mM Phosphate buffer at pH 7.5 beginning with K3PO4 and 1 M HCl or 1 M NaOH? Please help and show calculations. Thank you

Draw the four most importantcontributing structures of the cation intermediate thatforms in the electrophilic chlorination of phenol,(C6H5OH) to form p-chlorophenol. Put a circle aroundthe best one. Can you please each step and also how you would approach a similar problem. Thank you!

A 100mM lactic acid/lactate buffer was found to have a lactate to lactic acid ratio of 2 and a pH of 4.2. What is the pKa of lactic acid? Can you please help show the calculations?

Chapter 2 Solutions

Chemistry: The Central Science (13th Edition)

Ch. 2.3 - Prob. 2.1.1PE Ch. 2.3 - Prob. 2.1.2PE Ch. 2.3 - Prob. 2.2.1PE Ch. 2.3 - Prob. 2.2.2PE Ch. 2.3 - Prob. 2.3.1PE Ch. 2.3 - Prob. 2.3.2PE Ch. 2.4 - Practice Exercise 1 The atomic weight of copper,...Ch. 2.4 - Prob. 2.4.2PE Ch. 2.5 - Prob. 2.5.1PE Ch. 2.5 - Prob. 2.5.2PE

Ch. 2.6 - 11.93 The vapor pressure of ethanol (C2H5OH) at 19...Ch. 2.6 - Prob. 2.6.2PE Ch. 2.7 - Prob. 2.7.1PE Ch. 2.7 - Prob. 2.7.2PE Ch. 2.7 - Prob. 2.8.1PE Ch. 2.7 - Consider the two-dimensional square lattice of...Ch. 2.7 - Prob. 2.9.1PE Ch. 2.7 - Given the ionic radii and molar masses of Sc3+...Ch. 2.7 - Prob. 2.10.1PE Ch. 2.7 - Prob. 2.10.2PE Ch. 2.8 - Prob. 2.11.1PE Ch. 2.8 - Prob. 2.11.2PE Ch. 2.8 - Prob. 2.12.1PE Ch. 2.8 - Prob. 2.12.2PE Ch. 2.8 - Prob. 2.13.1PE Ch. 2.8 - The table below shows the normal boiling points of...Ch. 2.8 - Prob. 2.14.1PE Ch. 2.8 - Prob. 2.14.2PE Ch. 2.9 - Prob. 2.15.1PE Ch. 2.9 - Prob. 2.15.2PE Ch. 2 - Prob. 1E Ch. 2 - At 280C, raw milk sours in 4.0 h but takes 48 h to...Ch. 2 - At 900 o C, Kc = 0.0108 for the reaction CaCO3(g) ...Ch. 2 - Calculate the molar concentration of OH- in a...Ch. 2 - Pyridinium bromide (C5H5NHBr) is a strong...Ch. 2 - Prob. 6E Ch. 2 - Prob. 7E Ch. 2 - Prob. 8E Ch. 2 - Prob. 9E Ch. 2 - Indicate whether each statement is true or false:...Ch. 2 - Prob. 11E Ch. 2 - Prob. 12E Ch. 2 - Prob. 13E Ch. 2 - At 20 oC, the vapor pressure of benzene (C6 H6) is...Ch. 2 - Summarize the evidence used by J. J. Thomson to...Ch. 2 - Prob. 16E Ch. 2 - Prob. 17E Ch. 2 - Prob. 18E Ch. 2 - Suppose the rate law for the reaction in this...Ch. 2 - Practice Exercise 1 Using the data in Sample...Ch. 2 - Which of the following linear plots do you expect...Ch. 2 - A flask is charged with 0.100 mol of A and allowed...Ch. 2 - Prob. 23E Ch. 2 - Prob. 24E Ch. 2 - Prob. 25E Ch. 2 - Prob. 26E Ch. 2 - The addition of No accelerates the decomposition...Ch. 2 - Prob. 28E Ch. 2 - Prob. 29E Ch. 2 - The rates of many atmospheric reactions are...Ch. 2 - Prob. 31E Ch. 2 - Prob. 32E Ch. 2 - Prob. 33E Ch. 2 - 15.23 The equilibrium constant for the...Ch. 2 - A mixture of 0.10 mol of NO, 0.050 mol of H2, and...Ch. 2 - Prob. 36E Ch. 2 - Prob. 37E Ch. 2 - Prob. 38E Ch. 2 - Prob. 39E Ch. 2 - Prob. 40E Ch. 2 - Practice Exercise 1 Order the following three...Ch. 2 - Practice Exercise 1 What is the pH of a 0.28 M...Ch. 2 - Prob. 43E Ch. 2 - Which of the following diagrams best represent an...Ch. 2 - Prob. 45E Ch. 2 - Prob. 46E Ch. 2 - Prob. 47E Ch. 2 - Prob. 48E Ch. 2 - Prob. 49E Ch. 2 - 16.72 Calculate the molar concentration of OH- in...Ch. 2 - Prob. 51E Ch. 2 - Prob. 52E Ch. 2 - Prob. 53E Ch. 2 - Prob. 54E Ch. 2 - a. Given that Ka for acetic acid is 1.8 10-5 and...Ch. 2 - 16.78 a. Given that Kb for ammonia is 1.8 X 10 -5...Ch. 2 - Prob. 57E Ch. 2 - Prob. 58E Ch. 2 - Prob. 59E Ch. 2 - Prob. 60E Ch. 2 - Prob. 61E Ch. 2 - Prob. 62E Ch. 2 - 16.86 An unknown salt is either KBr, NH4 C1, KCN,...Ch. 2 - Prob. 64E Ch. 2 - Prob. 65E Ch. 2 - 16.89 Based on their compositions and structures...Ch. 2 - Prob. 67E Ch. 2 - 16.91 Indicate whether each of the following...Ch. 2 - Prob. 69E Ch. 2 - Prob. 70E Ch. 2 - Prob. 71E Ch. 2 - Prob. 72E Ch. 2 - Prob. 73E Ch. 2 - Prob. 74E Ch. 2 - Prob. 75E Ch. 2 - Prob. 76E Ch. 2 - Prob. 77E Ch. 2 - Prob. 78E Ch. 2 - Prob. 79E Ch. 2 - Benzoic acid (C6H5COOH) and aniline (C6H5NH2) are...Ch. 2 - Prob. 81E Ch. 2 - Prob. 82E Ch. 2 - Prob. 83E Ch. 2 - Butyric acid is responsible for the foul smell of...Ch. 2 - Prob. 85E Ch. 2 - Prob. 86E Ch. 2 - Prob. 87AE Ch. 2 - 1S.113 Many moderately large organic molecules...Ch. 2 - Prob. 89AE Ch. 2 - Prob. 90AE Ch. 2 - Prob. 91AE Ch. 2 - Prob. 92AE Ch. 2 - Prob. 93AE Ch. 2 - 16.120 At 50 oC, the ion-product constant for H2...Ch. 2 - Prob. 95AE Ch. 2 - Prob. 96AE Ch. 2 - Prob. 97AE Ch. 2 - Prob. 98AE Ch. 2 - Prob. 99AE Ch. 2 - Which two statements about gas mixtures are true?...Ch. 2 - Prob. 101AE Ch. 2 - 13.6 If you compare the solubilities of the noble...Ch. 2 - Prob. 103AE Ch. 2 - Prob. 104AE Ch. 2 - Suppose you had a balloon made of some highly...Ch. 2 - Prob. 106AE Ch. 2 - Indicate whether each statement is true or false:...Ch. 2 - Indicate the type of solute-solvent interaction...Ch. 2 - An ionic compound has a very negative H soln in...Ch. 2 - Prob. 110AE Ch. 2 - Prob. 111AE Ch. 2 - The solubility of Cr (NO3)3 . 9 H2O in water is...

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemistry and related others by exploring similar questions and additional content below.

The value of K a for the parent acid HA .

Concept explainers

Videos

To determine: The value of Ka for the parent acid HA .

Want to see the full answer?

Chapter 2 Solutions