# Chapter 16, Problem 16.25QP

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### CHEMISTRY: ATOMS FIRST VOL 1 W/CON...

14th Edition
Burdge
ISBN: 9781259327933

#### Solutions

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Section
FindFindarrow_forward

### CHEMISTRY: ATOMS FIRST VOL 1 W/CON...

14th Edition
Burdge
ISBN: 9781259327933
Interpretation Introduction

Interpretation: The concentration of OH- ions in 1.4×103MHCl solution has to be calculated

Concept Information:

Relationship between pH and pOH

pOH is similar to pH .  The only difference is that in pOH the concentration of hydroxide ion is used as a scale while in pH , the concentration of hydronium ion is used.

The equation of equilibrium for autoionization of water is,

Kw=[H+][OH-]

The equilibrium expression for water at 25oC is,

[H+][OH-]= 1×10-14

Taking negative logarithm on both sides, we get

log([H+][OH-])= -log(1×10-14)(log[H+])+(-log[OH-])= 14)

The relationship between the hydronium ion concentration and the hydroxide ion concentration is given by the equation,

pH+pOH=14,at25oC

As pOH and pH are opposite scale, the total of both has to be equal to 14.

To Calculate: The concentration of OH- ions in a 1.4×103MHCl solution

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