   # Calculate the concentration of all species present and the pH of a 0.020 -M HF solution. ### Chemistry: An Atoms First Approach

2nd Edition
Steven S. Zumdahl + 1 other
Publisher: Cengage Learning
ISBN: 9781305079243

#### Solutions

Chapter
Section ### Chemistry: An Atoms First Approach

2nd Edition
Steven S. Zumdahl + 1 other
Publisher: Cengage Learning
ISBN: 9781305079243
Chapter 13, Problem 65E
Textbook Problem
5 views

## Calculate the concentration of all species present and the pH of a 0.020-M HF solution.

Interpretation Introduction

Interpretation: The concentration of all the species present in a 0.020M HF solution and its pH is to be calculated.

Concept introduction: The pH of a solution is define as a figure that expresses the acidity of the alkalinity of a given solution. A logarithmic scale is used on which, the value 7 corresponds to a neutral species, a value less than 7 corresponds to an acid and a value greater than 7 corresponds to a base.

The pH of a solution is calculated by the formula, pH=log[H+]

### Explanation of Solution

Explanation

To determine: The concentration of all the species present in a 0.020M HF solution and its pH .

The dissociation of HF is, HF(aq)  H+(aq) + F(aq)

The stated reaction is,

HF(aq)  H+(aq) + F(aq)

The major species that are present are H+ and F .

The [H+] and [F] is 3.6×10-3M_ .

The change in concentration of HF is assumed to be x .

The ICE table for the stated reaction is,

HF(aq)H+(aq)+F(aq)Inititialconcentration0.02000Changex+x+xEquilibriumconcentration0.020xxx

The equilibrium concentration of [HF] is (0.020x)M .

The equilibrium concentration of [H+] is xM .

The equilibrium concentration of [F] is xM .

The Ka for HF is 6.6×104 .

At equilibrium, the equilibrium constant expression is expressed by the formula,

Ka=ConcentrationofproductsConcentrationofreactants

Where,

• Ka is the acid dissociation constant.

The equilibrium constant expression for the given reaction is,

Ka=[H+][F][HF]

Substitute the value of Ka , [HF] , [H+] and [F] in equation (1)

### 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

Find more solutions based on key concepts
A deficiency of niacin may result in which disease? pellagra beriberi scurvy rickets

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

What things were unique about the 2005 Atlantic hurricane season?

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

A vascular bundle in a leaf is called _____ a. Xylem b. Mesophyll c. avein

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

A typical magnitude of the external magnetic field in a cardiac catheter ablation procedure using remote magnet...

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