BuyFind

Introductory Chemistry: A Foundati...

9th Edition
Steven S. Zumdahl + 1 other
Publisher: Cengage Learning
ISBN: 9781337399425
BuyFind

Introductory Chemistry: A Foundati...

9th Edition
Steven S. Zumdahl + 1 other
Publisher: Cengage Learning
ISBN: 9781337399425

Solutions

Chapter 16, Problem 1ALQ
Textbook Problem

You are asked for the H+ concentration in a solution of NaOH(aq). Because sodium hydroxide is a strong base, can we say there is no H+. since having H+ would imply that the solution is acidic?

Expert Solution
Interpretation Introduction

Interpretation:

Whether there are any H+ present in a solution of NaOH( a q ) should be explained.

Concept Introduction:

Water is an amphoteric substance which means it can behave as either as an acid or as a base. We can see this clearly in the ionization of water. A proton from one water molecule is transferred to another water molecule to produce a hydroxide ion and a hydronium ion.

H2O(l) + H2O(l)H3O(aq)+ + OH(aq)-

In this water molecule that removing a proton acts as the acid and water molecule that accepts the proton acts as the base. The forward reaction does not occur in great extent. In pure water only few amount of hydronium ion and hydroxide ions present and they are equal. At 250C the actual concentrations are [H3O+] = [OH-] = 1.0×10-7 M. The product of hydronium ion and hydroxyl ion is always constant. We call this constant, the ion product constant, Kw. Thus, at 250C, [H3O+][OH-] = 1.0×10-14=Kw.

Answer to Problem 1ALQ

There are H+ present in an aqueous solution of NaOH.

Explanation of Solution

Since this is an aqueous solution of NaOH, H2 O molecules are also present. According to the meaning of ion-product constant, at constant temperature, in any aqueous solution the product of [H+ ] and [OH- ] must be constant. If we add a base to water, we get a basic solution. In this case because we have added a source of OH- the [OH- ] will be greater than the [H+ ]. So the equilibrium H2O(l) + H2O(l)H3O(aq)+ + OH(aq)- will tend more towards left hand side making more water molecules. But still tiny amount of H+ is present because the ion product should be constant.

Conclusion

There are H+ present in an aqueous solution of NaOH.

Want to see more full solutions like this?

Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!

Want to see more full solutions like this?

Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!

Chapter 16 Solutions

Introductory Chemistry: A Foundation
Ch. 16 - Explain why Cl- does not affect the pH of an...Ch. 16 - Write the general reaction for an acid acting in...Ch. 16 - Differentiate among the terms concentrated,...Ch. 16 - What is meant by “pH”? True or false: A strong...Ch. 16 - Consider two separate solutions: one containing a...Ch. 16 - Why is the pH of water at 25 °C equal to 7.00? 6....Ch. 16 - Can the pH of a solution be negative? Explain.Ch. 16 - Stanley’s grade-point average (GPA) is 3.28. What...Ch. 16 - . A friend asks the following: “Consider a...Ch. 16 - . Mixing together aqueous solutions of acetic acid...Ch. 16 - . Could a buffered solution be made by mixing...Ch. 16 - . Consider the equation:...Ch. 16 - . Choose the answer that best completes the...Ch. 16 - . You mix a solution of a strong acid with a pH of...Ch. 16 - . The following figures are molecular-level...Ch. 16 - . Answer the following questions concerning...Ch. 16 - What are some physical properties that...Ch. 16 - Write an equation showing how HCl(g) behaves as an...Ch. 16 - According to the Brøsted-Lowry model, an acid is a...Ch. 16 - How do the components of a conjugate acid—base...Ch. 16 - 5. Given the general equation illustrating the...Ch. 16 - According to Arrhenius, ____________ produce...Ch. 16 - Which of the following do not represent a...Ch. 16 - Which of the following do not represent a...Ch. 16 - In each of the following chemical equations,...Ch. 16 - . In each of the following chemical equations,...Ch. 16 - . Write the conjugate acid for each of the...Ch. 16 - . Write the conjugate acid for each of the...Ch. 16 - . Write the conjugate base for each of the...Ch. 16 - . Write the conjugate base for each of the...Ch. 16 - . Write a chemical equation showing how each of...Ch. 16 - . Write a chemical equation showing how each of...Ch. 16 - . What does it mean to say that an acid is strong...Ch. 16 - . What does it mean to say that an acid is weak in...Ch. 16 - . How is the strength of an acid related to the...Ch. 16 - . A strong acid has a weak conjugate base, whereas...Ch. 16 - . Write the formula for the hydronium ion. Write...Ch. 16 - . Name four strong acids. For each of these, write...Ch. 16 - . Organic acids contain the carboxyl group Using...Ch. 16 - . What is an oxyacid? Write the formulas of three...Ch. 16 - 25. Which of the following acids have relatively...Ch. 16 - . The “Chemistry in Focus” segment Plants Fight...Ch. 16 - . Water is the most common amphoteric substance,...Ch. 16 - . Anions containing hydrogen (for example. HCO3and...Ch. 16 - . What is meant by the iou-product constant for...Ch. 16 - . What happens to the hydroxide ion concentration...Ch. 16 - . Calculate the [H+] in each of the following...Ch. 16 - . Calculate the [H+] in each of the following...Ch. 16 - . Calculate the [OH-] in each of the following...Ch. 16 - . Calculate the [OH-] in each of the following...Ch. 16 - 35. For each pair of concentrations, tell which...Ch. 16 - . For each pair of concentrations, tell which...Ch. 16 - . Why do scientists tend to express the acidity of...Ch. 16 - . Using Fig. 16.3, list the approximate pH value...Ch. 16 - . For a hydrogen ion concentration of 2.33106M,...Ch. 16 - . The “Chemistry in Focus” segment Garden-Variety...Ch. 16 - . Calculate the pH corresponding to each of the...Ch. 16 - . Calculate the pH corresponding to each of the...Ch. 16 - . Calculate the pH corresponding to each of the...Ch. 16 - . Calculate the pH corresponding to each of the...Ch. 16 - 45. Calculate the p1-I corresponding to each of...Ch. 16 - . Calculate the pOH value corresponding to each of...Ch. 16 - . For each hydrogen ion concentration listed,...Ch. 16 - . For each hydrogen ion concentration listed,...Ch. 16 - . Calculate the hydrogen ion concentration, in...Ch. 16 - . Calculate the hydrogen ion concentration, in...Ch. 16 - . Calculate the hydrogen ion concentration, in...Ch. 16 - . Calculate the hydrogen ion concentration, in...Ch. 16 - . Calculate the pH of each of the following...Ch. 16 - . Calculate the pH of each of the following...Ch. 16 - 55. When 1 mole of gaseous hydrogen chloride is...Ch. 16 - . A bottle of acid solution is labeled “3 M HNO3.”...Ch. 16 - . Calculate the hydrogen ion concentration and the...Ch. 16 - . Calculate the pH of each of the following...Ch. 16 - . What characteristic properties do buffered...Ch. 16 - . What two components make up a buffered solution?...Ch. 16 - . Which component of a buffered solution is...Ch. 16 - . Which component of a buffered solution consumes...Ch. 16 - . Which of the following combinations would act as...Ch. 16 - . A buffered solution is prepared containing...Ch. 16 - . The concepts of acid-base equilibria were...Ch. 16 - . Strong buses are bases that completely ionize in...Ch. 16 - . 01 the following conditions, which indicate an...Ch. 16 - . Of the following conditions, which indicate a...Ch. 16 - . Buffered solutions are mixtures of a weak acid...Ch. 16 - . Of the following acids, which have relatively...Ch. 16 - . Is it possible for a solution to have...Ch. 16 - . Despite HCI’s being a strong acid, the pH of...Ch. 16 - . According to Arrhenius, bases are species that...Ch. 16 - . According to the Brønsted-Lowry model, a base is...Ch. 16 - 75. A conjugate acid-base pair Consists of two...Ch. 16 - . Acetate ion, C2H3O2- , has a stronger affinity...Ch. 16 - . An acid such as HCl that strongly conducts an...Ch. 16 - . Draw the structure of the carboxyl group. —COOH....Ch. 16 - . Because of _________ , even pure water contains...Ch. 16 - . The ion-product constant for water, Kw, has the...Ch. 16 - . The number of________ in the logarithm of a...Ch. 16 - . A solution with pH = 9 has a (higher/lower)...Ch. 16 - . A 0.20 M HCI solution contains ________ M...Ch. 16 - . A buffered solution is one that resists a change...Ch. 16 - . A(n) _________ solution contains a conjugate...Ch. 16 - . When sodium hydroxide, NaOH, is added dropwise...Ch. 16 - . When hydrochloric acid, HCI. is added dropwise...Ch. 16 - . The following are representations of acid-base...Ch. 16 - . In each of the following chemical equations,...Ch. 16 - . Write the conjugate acid for each of the...Ch. 16 - . Write the conjugate base for each of the...Ch. 16 - . Of the following combinations, which would act...Ch. 16 - . Which of the following bases have relatively...Ch. 16 - . Calculate [H+] in each of the following...Ch. 16 - . Calculate [OH-] in each of the following...Ch. 16 - . Calculate the pH corresponding to each of the...Ch. 16 - . Calculate the pH of each of the solutions...Ch. 16 - . Calculate the pH corresponding to each of the...Ch. 16 - . Calculate the pOH corresponding to each of the...Ch. 16 - . For each hydrogen or hydroxide ion concentration...Ch. 16 - . Calculate the hydrogen ion concentration, in...Ch. 16 - . Calculate the hydrogen ion concentration, in...Ch. 16 - . Calculate the hydrogen ion concentration, in...Ch. 16 - . Calculate the hydrogen ion concentration and the...Ch. 16 - . Write the formulas for three combinations of...Ch. 16 - . Choose pairs in which the species listed first...Ch. 16 - . Complete the table for each of the following...Ch. 16 - . Consider 0.25 M solutions of the following...

Additional Science Textbook Solutions

Find more solutions based on key concepts
According to the USDA Eating Patterns, which of the following vegetables should be limited? a. carrots b. avoca...

Nutrition: Concepts and Controversies - Standalone book (MindTap Course List)

Match the concepts:

Human Biology (MindTap Course List)

A flat surface of area 3.20 m2 is rotated in a uniform electric field of magnitude E = 6.20 105 N/C. Determine...

Physics for Scientists and Engineers, Technology Update (No access codes included)

What factors affect sea level and the location of a coast?

Oceanography: An Invitation To Marine Science, Loose-leaf Versin