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12.10 Salts

A salt is an ionic compound which when dissolved in water yields a positive ion other than hydrogen ion (H+) and a negative ion other than hydroxyl ion (OH-).

No.

Salt

Prepared from

 

1

2

3

 

KCL

NH4Cl

FeSO4

Acid

Base

HCl

HCl

H2SO4

KOH

NH3

FeO


Classification of Salts

No.

Name

Formation

Contains

Examples

1

Normal Salt

Formed by replacement of the hydrogen by a basic radical

Doesnít contain replaceable hydrogen

NaCl, CuSO4,

AgCl,

CH3COONa

2

Acid salt

Formed by replacement of a part of the hydrogen by a basic radical

Replaceable hydrogen

NaHSO3, KHSO3, NaH2PO4, K2HPO3

3

Basic salt

Formed by incomplete neutralization of a base Pb(OH)Cl,

Metallic cation OH- of a base & anion of acid with an acid

Cu(OH)NO3, Pb(OH)Cl, Pb(OHNO3)

4

Double salt

Formed by mixing saturated solutions of two salts

Mixture of two salts combined together

Mohrís salt

FeSO4, (NH4)2SO4

6H2O

Alum

K2SO4.Al2(SO4)3

24H2O

5

Mixed salt

No general method

Two or more acidic or basic

NaKCO3, Ca(OCl)Cl

6

Complex salt

Mixing saturated solution of two salts

Simple and complex ions

K2(HgI4)

Na22HO2

[next page]

Index

12.1 - Lowry and Bronsted Concept
12.2 - Conjugate Acid Base Pairs
12.3 - Amphoteric Substance
12.4 - Lewis Acids and Bases
12.5 - Strong and Weak Acids and Bases
12.6 - Dissociation
12.7 - Ostwald's Dilution Law
12.8 - Hydrogen Ion Concentration : pH
12.9 - Polyprotic Acids
12.10 - Salts
12.11 - Methods of Preparation of Salts
12.12 - Properties of Salts

Chapter 13





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