   Chapter 14, Problem 158AE

Chapter
Section
Textbook Problem

# Rank the following 0.10 M solutions in order of increasing pH.a. HI, HF, NaF, NaIb. NH4Br, HBr, KBr, NH3c. C6H5NH3NO3, NaNO3, NaOH, HOC6H5, KOC6H5, C6H5NH2, hno3

(a)

Interpretation Introduction

Interpretation: The 0.10 solution of given compounds are to be rank in order of increasing pH values.

Concept introduction: The scale of acidity from 0 to 14 is known as pH scale. The value of pH less than seven is considered as acid whereas the value of pH greater than seven is considered as base.

The pH value of strong acid is very less (close to 1 ) whereas the pH value of strong base is high (close to 14 ).

To arrange: The compound HI,HF,NaF,NaI in order of increasing pH values.

Explanation

Explanation

Refer to table 13-7 .

The acidic strength of compound depends on their bond strength.

The order of acidic strength is HI>HF

The compound NaF and NaI are salts. The NaF is conjugate base of weak acid. It means that it is a strong base

(b)

Interpretation Introduction

Interpretation: The 0.10 solution of given compounds are to be rank in order of increasing pH values.

Concept introduction: The scale of acidity from 0 to 14 is known as pH scale. The value of pH less than seven is considered as acid whereas the value of pH greater than seven is considered as base.

The pH value of strong acid is very less (close to 1 ) whereas the pH value of strong base is high (close to 14 ).

To arrange: The compound HBr,NH4Br,KBr,NH3 in order of increasing pH values.

(c)

Interpretation Introduction

Interpretation: The 0.10 solution of given compounds are to be rank in order of increasing pH values.

Concept introduction: The scale of acidity from 0 to 14 is known as pH scale. The value of pH less than seven is considered as acid whereas the value of pH greater than seven is considered as base.

The pH value of strong acid is very less (close to 1 ) whereas the pH value of strong base is high (close to 14 ).

To arrange: The given compound in order of increasing pH values.

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