Chapter 19.5, Problem 48LC

Interpretation Introduction

Interpretation : The salt that would hydrolyze to produce an acidic aqueous solution is to be identified.

Concept Introduction : One of the products of a neutralization reaction is salt. Salt constitutes a cation from a base and an anion from an acid. They are neutral in solution form.

Answer to Problem 48LC

Option (d) is the correct answer

Explanation of Solution

When salt is dissociated, its cations or anions either remove hydrogen ions or give hydrogen ions to water.

Positive ions in salts that form acidic solutions cause them to release hydrogen ions into the water.

Negative ions in salts that create basic solutions draw hydrogen ions from water.

The given salt is ${\left({\text{NH}}_{\text{4}}\right)}_{\text{2}}{\text{SO}}_{\text{4}}$ .

The salt forms an acidic solution because the anion is from strong acid.

The salt is formed by the reaction of strong acid sulfuric acid and weak base ammonia.

Conclusion

The reason for incorrect options The given salt is ${\text{KC}}_{\text{2}}{\text{H}}_{\text{3}}{\text{O}}_{\text{2}}$ .

The salt does not form an acidic solution because the anion is from a weak acid.

The salt is formed by the reaction of weak acid methanoic acid and strong base potassium hydroxide.

The given salt is $\text{LiCl}$ .

The salt forms a neutral solution.

  $\text{LiCl}+{\text{H}}_{\text{2}}\text{O}\to \text{LiOH}+\text{HCl}$

The given salt is ${\text{NaHCO}}_3$ .

The salt does not form an acidic solution because the anion is from a weak acid.

The salt is formed by the reaction of weak acid carbonic acid and strong base sodium hydroxide.