Interpretation Introduction To determine: The concentration of the lactate ion in the given solution. Explanation Given The concentration of lactic acid ( CH 3 CH ( OH ) COOH ) in the solution is 0.100 M . The concentration of HCl in the solution is 0.080 M . Value of p K a for lactic acid is 3.86 . Value of p K a is equal to the negative logarithm of base-10 of acid dissociation constant, K a and is given by the expression, p K a = − log K a Thus, K a for lactic acid is calculated by the formula, K a = 10 ( − p K a ) Substitute the value of p K a in the above formula. K a = 10 ( − 3.86 ) K a = 1.38 × 10 − 4 The pH of a solution depends on its hydrogen ion concentration. The solution contains lactic acid ( CH 3 CH ( OH ) COOH ) and hydrochloric acid ( HCl ) . Here, CH 3 CH ( OH ) COOH is a weak electrolyte and dissociates slightly in the solution, while HCl is a strong electrolyte and dissociates completely in the solution. The dissociation of CH 3 CH ( OH ) COOH is given as, CH 3 CH ( OH ) COOH ( a q ) ⇌ H + ( a q ) + CH 3 CH ( OH ) COO − ( a q ) The dissociation of HCl is given as, HCl ( a q ) → H + ( a q ) + Cl − ( a q ) As, Cl − is neither acidic nor basic, its concentration does not change the pH of the solution. The pH depends only on the concentration of H + . Make an ICE table for the dissociation of CH 3 CH ( OH ) COOH . CH 3 CH ( OH ) COOH ( a q ) ⇌ H + ( a q ) + CH 3 CH ( OH ) COO − ( a q ) Initial: 0 .100 0.080 0.0 Change: − x + x + x Equilibrium: ( 0

Laboratory Experiments for Chemistry: The Central Science (14th Edition)

14th Edition

ISBN: 9780134566207

Author: Theodore E. Brown, H. Eugene LeMay, Bruce E. Bursten, Catherine Murphy, Patrick Woodward, Matthew E. Stoltzfus, John H. Nelson, Kenneth C. Kemp

Publisher: PEARSON

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Acid Base Titration

An acid-base titration is the method of quantitative analysis for determining the concentration of an acid and base by exactly neutralizing it with a standard solution of base or acid having known concentration.

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Chapter 17.1, Problem 17.2.1PE

Interpretation Introduction

To determine:The concentration of the lactate ion in the given solution.

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Chapter 17 Solutions

Laboratory Experiments for Chemistry: The Central Science (14th Edition)

Ch. 17.1 - For the generic equilibrium HA(aq)H+(aq)+A(aq) ,...Ch. 17.1 - Practice Exercise 2 Calculate the pH of a solution...Ch. 17.1 - Calculate the concentration of the lactate ion in...Ch. 17.1 - Practice Exercise 2 Calculate the format ion...Ch. 17.2 - Practice Exercise 1 If the pH of a buffer solution...Ch. 17.2 - Prob. 17.3.2PE Ch. 17.2 - Prob. 17.4.1PE Ch. 17.2 - Prob. 17.4.2PE Ch. 17.2 - Calculate the number of grams of ammonium chloride...Ch. 17.2 - Prob. 17.5.2PE

Ch. 17.2 - Prob. 17.6.1PE Ch. 17.2 - Determine The pH of the original buffer described...Ch. 17.3 - An acid-base titration is performed: 250.0 mL of...Ch. 17.3 - Prob. 17.7.2PE Ch. 17.3 - Prob. 17.8.1PE Ch. 17.3 - Calculate the pH in the solution formed by adding...Ch. 17.3 - Prob. 17.9.1PE Ch. 17.3 - Prob. 17.9.2PE Ch. 17.4 - Which of these expressions correctly expresses the...Ch. 17.4 - Prob. 17.10.2PE Ch. 17.4 - You add 10.0 grams of solid copper(II) phosphate,...Ch. 17.4 - Prob. 17.11.2PE Ch. 17.4 - Prob. 17.12.1PE Ch. 17.4 - Prob. 17.12.2PE Ch. 17.5 - Consider a saturated solution of the salt MA3, in...Ch. 17.5 - Prob. 17.13.2PE Ch. 17.5 - Prob. 17.14.1PE Ch. 17.5 - Prob. 17.14.2PE Ch. 17.5 - Prob. 17.15.1PE Ch. 17.5 - Prob. 17.15.2PE Ch. 17.6 - An insoluble salt MA has a Kap of 1.0 × 10-10. Two...Ch. 17.6 - Does a precipitate form when 0.050 L of 2.0 × 10-2...Ch. 17.6 - Under what conditions does an ionic compound...Ch. 17.6 - Prob. 17.17.2PE Ch. 17 - Prob. 1DE Ch. 17 - The following boxes represent aqueos solutions...Ch. 17 - Prob. 2E Ch. 17 - Prob. 3E Ch. 17 - Prob. 4E Ch. 17 - Prob. 5E Ch. 17 - Prob. 6E Ch. 17 - Prob. 7E Ch. 17 - Prob. 8E Ch. 17 - 17.9 The following graphs represent the behavior...Ch. 17 - Prob. 10E Ch. 17 - 17.11 The graph below shows the solubility of a...Ch. 17 - 17.12 Three cations, Ni+2, Cu+2, and Ag+, are...Ch. 17 - Prob. 13E Ch. 17 - Prob. 14E Ch. 17 - Prob. 15E Ch. 17 - Use information from Appendix D to calculate the...Ch. 17 - Prob. 17E Ch. 17 - a. calculate the percent ionization of 0.125 M...Ch. 17 - Prob. 19E Ch. 17 - 17.20 Which of the following solutions is a...Ch. 17 - Prob. 21E Ch. 17 - Calculate the pH of a buffer that is 0.105n M in...Ch. 17 - Prob. 23E Ch. 17 - A buffer is prepared by adding 10.0 g of ammonium...Ch. 17 - You are asked to prepare a pH = 3.00 buffer...Ch. 17 - You are asked to prepare an pH = 4.00 buffer...Ch. 17 - Prob. 27E Ch. 17 - Prob. 28E Ch. 17 - Prob. 29E Ch. 17 - Prob. 30E Ch. 17 - Prob. 31E Ch. 17 - Prob. 32E Ch. 17 - The accompanying graph shows the titration curves...Ch. 17 - Prob. 34E Ch. 17 - 17.35 The samples of nitric and acetic acids shows...Ch. 17 - 17.36 Determine whether each of the following...Ch. 17 - Prob. 37E Ch. 17 - Prob. 38E Ch. 17 - Prob. 39E Ch. 17 - Assume that 30.0 mL of a M solution of a week base...Ch. 17 - Prob. 41E Ch. 17 - Prob. 42E Ch. 17 - Prob. 43E Ch. 17 - Prob. 44E Ch. 17 - Prob. 45E Ch. 17 - Consider the titration of 30.0 mL of 0.050 M NH3...Ch. 17 - Prob. 47E Ch. 17 - Prob. 48E Ch. 17 - 17.49 for each statement, incate whether it is...Ch. 17 - The solubility of two slighty soluble salts of...Ch. 17 - Prob. 51E Ch. 17 - 17.52 a. true or false: solubility and...Ch. 17 - If the molar solubility CaF2 at 35 C is 1.24 *10-3...Ch. 17 - Prob. 54E Ch. 17 - Prob. 55E Ch. 17 - Prob. 56E Ch. 17 - using calculate the molar solubility of AgBr in a....Ch. 17 - calculate the solubility of LaF3 in grams per...Ch. 17 - Prob. 59E Ch. 17 - Consider a beaker containing a saturated solution...Ch. 17 - Calculate the solubility of Mn (OH) 2 in grams per...Ch. 17 - Calculate the molar solubility of Ni (OH) 2 when...Ch. 17 - 17.63 Which of the following salts will be...Ch. 17 - For each of the following slightly soluble salts,...Ch. 17 - Prob. 65E Ch. 17 - Prob. 66E Ch. 17 - Use values of Kap for Agl and Kf for Ag (CN) 2- to...Ch. 17 - Prob. 68E Ch. 17 - Prob. 69E Ch. 17 - Prob. 70E Ch. 17 - Calculate the minimum pH needed to precipitate Mn...Ch. 17 - Prob. 72E Ch. 17 - Prob. 73E Ch. 17 - Prob. 74E Ch. 17 - Prob. 75E Ch. 17 - Prob. 76E Ch. 17 - A solution containing several metal ions is...Ch. 17 - An unknown solid is entirely soluble in water. On...Ch. 17 - Prob. 79E Ch. 17 - Prob. 80E Ch. 17 - 17.81 Precipitation of the group 4 cautions of...Ch. 17 - Prob. 82E Ch. 17 - Prob. 83AE Ch. 17 - Prob. 84AE Ch. 17 - Furoic acid (HC5H3O3) has a K value of 6.76 x 10-4...Ch. 17 - Prob. 86AE Ch. 17 - Equal quantities of 0.010 M solution of an acid HA...Ch. 17 - Prob. 88AE Ch. 17 - 17.89 A biochemist needs 750 ml of an acetic...Ch. 17 - A sample of 0.2140 g of an unknown monophonic acid...Ch. 17 - A sample of 0.1687 g of an unknown monoprotic acid...Ch. 17 - Prob. 92AE Ch. 17 - Prob. 93AE Ch. 17 - What is the pH of a solution made by mixing 0.30...Ch. 17 - Suppose you want to do a physiological experiment...Ch. 17 - Prob. 96AE Ch. 17 - Prob. 97AE Ch. 17 - For each pair of compounds, use Kap values to...Ch. 17 - Prob. 99AE Ch. 17 - Tooth enamel is composed of hydroxyapatite, whose...Ch. 17 - Salts containing the phosphate ion are added to...Ch. 17 - Prob. 102AE Ch. 17 - 17.103 The solubility –product constant for barium...Ch. 17 - Prob. 104AE Ch. 17 - Prob. 105AE Ch. 17 - A buffer of what pH is needed to give a Mg2+...Ch. 17 - The value of Kap for Mg3(AsO4)2 is 2.1 10-20 ....Ch. 17 - Prob. 108AE Ch. 17 - Prob. 109AE Ch. 17 - Prob. 110IE Ch. 17 - Prob. 111IE Ch. 17 - Prob. 112IE Ch. 17 - Prob. 113IE Ch. 17 - Prob. 114IE Ch. 17 - Prob. 115IE Ch. 17 - Prob. 116IE Ch. 17 - A concentration of 10-100 parts per billion (by...Ch. 17 - Prob. 118IE Ch. 17 - Prob. 119IE Ch. 17 - In nonaqueous solvents, it is possible to react HF...

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