   Chapter 16, Problem 50PS

Chapter
Section
Textbook Problem

A 0.015M solution of a base has a pH of 10.09 a) What are the hydronium and hydroxide ion concentrations of this solution? b) Is the base a strong base, a moderately weak base (Ka of about 10‒5) or a very weak base (Kb of about 10‒10)?

(a)

Interpretation Introduction

Interpretation: The hydronium and hydroxide ion concentration of the solution has to be calculated.

Concept introduction:

Equilibrium constants:

The equilibrium constant is used to quantitative measurement of the strength of the acid and bases in the water.

Ka is acid constant for equilibrium reactions.

HA + H2OH3O++ A-Ka[H3O+][A-][HA]

Kb is a base constant for equilibrium reaction.

BOH + H2OB++ OH-Ka[B+][OH-][BOH]

Stronger acids have larger Ka value and stronger bases have larger Kb values.

To calculate the hydronium ion concentration and hydroxide ion concentration by using following formula.

pH + pOH=14

Explanation

pH = -log[H3O+]The given pH = 10.09 10.09 =  -log[H3O+][H3O+]= 8.1×10-11We know,pH + pOH =14.00pH =10.09         pOH =14 - 10.09                  =3

(b)

Interpretation Introduction

Interpretation:

The ionization constant (Kb) of an unknown base has to be calculated. and the base is a strong base or a moderately weak base or very weak base also to be identified.

Concept introduction:

Equilibrium constants:

The equilibrium constant is used to quantitative measurement of the strength of the acid and bases in the water.

Ka is acid constant for equilibrium reactions.

HA + H2OH3O++ A-Ka[H3O+][A-][HA]

Kb is base constant for equilibrium reaction.

BOH + H2OB++ OH-Ka[B+][OH-][BOH]

Stronger acids have larger Ka value and stronger bases have larger Kb values.

To calculate the hydronium ion concentration and hydroxide ion concentration by using following formula.

pH + pOH=14

Still sussing out bartleby?

Check out a sample textbook solution.

See a sample solution

The Solution to Your Study Problems

Bartleby provides explanations to thousands of textbook problems written by our experts, many with advanced degrees!

Get Started

Water-soluble vitamins are mostly absorbed into the lymph. the blood. the extracellular fluid, b and c.

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

Is cis-trans isomerism possible in alkanes?

Introduction to General, Organic and Biochemistry

What is hereditarianism, and what is the invalid assumption it makes?

Human Heredity: Principles and Issues (MindTap Course List)

Why can’t you see deeper into the Sun than the photosphere?

Horizons: Exploring the Universe (MindTap Course List)

Name one environmental factor that typically influences enzyme function.

Biology: The Unity and Diversity of Life (MindTap Course List) 