Chapter 16, Problem 7A

a.

Interpretation Introduction

Interpretation:Whether the given acid base pair HI,I- is a conjugate acid-base pair is to be found out.Corrections are to be made if they are not a conjugate acid base pair.

Concept Introduction:An acid and base pair with the gap of one proton(presence or absence) is called a conjugate acid-base pair.

Answer to Problem 7A

HI and I- are a conjugate acid base pair.

Explanation of Solution

HI is an acid. On removal of a proton it becomes I- which is a Lewis base. There is a difference of a single proton between the two of them so they are a conjugate acid base pair.

b.

Interpretation Introduction

Interpretation:Whether the given acid base pair H₃PO₄,PO₄³- is a conjugate acid-base pair is to be found out.Corrections are to be made if they are not a conjugate acid base pair.

Concept Introduction:An acid and base pair with the gap of one proton(presence or absence) is called a conjugate acid-base pair.

Answer to Problem 7A

H₃PO₄,PO₄³- is not a conjugate acid base pair. The correct conjugate acid base pair is H₃PO₄,H₂PO₄-

Explanation of Solution

H₃PO₄,PO₄³- have a proton difference of 3 so they are not a conjugate acid base pair. H₃PO₄,H₂PO₄- have a proton difference of 1 so it will be the correct conjugate acid base pair for this case.

c.

Interpretation Introduction

Interpretation:Whether the given acid base pair HClO,HClO₂ is a conjugate acid-base pair is to be found out.Corrections are to be made if they are not a conjugate acid base pair.

Concept Introduction:An acid and base pair with the gap of one proton(presence or absence) is called a conjugate acid-base pair.

Answer to Problem 7A

HClO,HClO₂is not a conjugate acid base pair. The correct conjugate acid base pair is HClO, ClO- and HClO₂,ClO₂-

Explanation of Solution

HClO and HClO₂are both separate acids and cannot be conjugate acid base pair for each other. They will form two separate conjugate acid base pairs which will have proton difference of 1 namely HClO, ClO- and HClO₂,ClO₂-

d.

Interpretation Introduction

Interpretation:Whether the given acid base pair H₂CO₃,CO₃²- is a conjugate acid-base pair is to be found out.Corrections are to be made if they are not a conjugate acid base pair.

Concept Introduction:An acid and base pair with the gap of one proton(presence or absence) is called a conjugate acid-base pair.

Answer to Problem 7A

H₂CO₃,CO₃²- is not a conjugate acid base pair. The correct conjugate acid base pair is H₂CO₃,HCO₃-

Explanation of Solution

H₂CO₃,CO₃²- have a proton difference of 2 so they are not a conjugate acid base pair. H₂CO₃,HCO₃- have a proton difference of 1 so it will be the correct conjugate acid base pair for this case.