Question

classify these salts as acidic, basic, or neutral: NH4Br, LiNO3, K2SO3, KCL, Na2S

Answer 1

General guidance

Concepts and reason

Neutralization reaction: Neutralization reaction is a reaction between acid and base, which gives salt and water. Depending on the nature of acid or base, salts are divided into three types

1.Acidic salt

2.Basic salt

3.Neutral salt

Fundamentals

Neutralization reaction:

HA (aq)+BOH (aqBA (a)+H20(1) acid base saltwater

\u2022 Acidic salt: Salts resulted from the neutralization of strong acid by weak base.

\u2022 Basic salt: Salts resulted from the neutralization of strong base by weak acid.

\u2022 Neutral salt: Salts resulted from the neutralization of strong base by weak acid.

Step-by-step

Step 1 of 3

1.${\\rm{N}}{{\\rm{H}}_{\\rm{4}}}{\\rm{Br}}$: Given salt is ammonium bromide, which forms ammonium and bromide ions during ionization. Bromide ion is a conjugate base of the strong acid HBr and the ammonium gives hydronium ions in water.

NH,Br->NH4'+Br

Therefore, given compound is made up of the combination of strong acid and the weak base, which indicates that it\u2019s an acidic salt.

2.${\\rm{LiN}}{{\\rm{O}}_{\\rm{3}}}$

Given salt is lithium nitrate, which forms lithium ion and nitrate ion during ionization. Lithium ion was generated from ${\\rm{LiOH}}$ and ${\\rm{N}}{{\\rm{O}}_{\\rm{3}}}^{\\rm{ - }}$ was obtained from${\\rm{HN}}{{\\rm{O}}_{\\rm{3}}}$. The neutralization reaction between the strong acid and strong base neutralization was written below

LiNO,-> Li + + N03. LiOH + HNO,-> L\u0130NO, + H2O

Therefore, it is a neutral in nature.

3.${{\\rm{K}}_{\\rm{2}}}{\\rm{S}}{{\\rm{O}}_{\\rm{3}}}$

Given salt is potassium sulfite, which is formed from the reaction of strong base and weak acid since sulfite ion gives hydroxide ions in water and the potassium ion obtained from strong base KOH. Therefore, given salt is considered as basic salt.

Dissociation of given salt can be written as

Then sulfite ion reacts with water as follows

SO, (a)H,(HSO, (aq)+OH (aq)

Explanation | Common mistakes | Hint for next step

Nature of the salts is given by using their conjugate ion (acid or base) nature.

1.${\\rm{N}}{{\\rm{H}}_{\\rm{4}}}{\\rm{Br}}$

Ammonium bromide is an acidic salt

2.${\\rm{LiN}}{{\\rm{O}}_{\\rm{3}}}$

Lithium nitrate is neutral salt.

3.${{\\rm{K}}_{\\rm{2}}}{\\rm{S}}{{\\rm{O}}_{\\rm{3}}}$

Potassium sulfite is basic salt.

Acidic salt: Salts resulted from the neutralization of strong acid by weak base.

Basic salt: Salts resulted from the neutralization of strong base by weak acid.

Neutral salt: Salts resulted from the neutralization of strong base by weak acid.

Step 2 of 3

4.${\\rm{KCl}}$

Given salt is potassium chloride, which forms potassium ion and chloride ion during ionization. This salt is formed from strong acid and strong base neutralization reaction.

KOH+HCI>KCHH2O

Therefore given salt is neutral salt.

5.${\\rm{N}}{{\\rm{a}}_{\\rm{2}}}{\\rm{S}}$

Given salt is sodium sulfide, which is formed from the strong base and weak acid since sulfide ion gives hydroxide ions in water and the sodium ion is obtained from strong base NaOH.

Dissociation of given salt can be written as

Na,S2Na +S

Then sulfide ion reacts with water in the following manner

Therefore, given salt is considered as basic salt.

Explanation | Common mistakes | Hint for next step

Nature of the salts is given by using their conjugate ion (acid or base) nature.

4.${\\rm{KCl}}$

Potassium chloride is neutral salt.

5.${\\rm{N}}{{\\rm{a}}_{\\rm{2}}}{\\rm{S}}$

Sodium sulfide is basic salt.

Acidic salt: Salts resulted from the neutralization of strong acid by weak base.

Basic salt: Salts resulted from the neutralization of strong base by weak acid.

Neutral salt: Salts resulted from the neutralization of strong base by weak acid.

Step 3 of 3

All given salts are classified below into acidic, basic, and neutral.

Basic salt:s Acidic salts Neutral salts K,so, LiNO NH4Br KCl Na,S

Classification of the given salts is given below.

Basic salt:s Acidic salts Neutral salts K,SO LiNO NH4Br KCl Na,S

All the given salts are classified into acidic, basic, and neutral salts according to their corresponding parent acid and base involved in neutralization reaction.

Answer

Classification of the given salts is given below.

Basic salt:s Acidic salts Neutral salts K,so, LiNO NH4Br KCl Na,S

Answer only

Classification of the given salts is given below.

Basic salt:s Acidic salts Neutral salts K,so, LiNO NH4Br KCl Na,S