6.8.1 Introduction to Salts
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Understanding salts
- A salt is an ionic compound formed when the hydrogen of an acid is partly or completely replaced by a metal ion or ammonium ion.
- All salts are chemically and electrically neutral.
Example
Diagram above shows that when the hydrogen ion in nitric acid is replaced by Na+, Ca2+, NH4+ or Al3+ ions, salts are formed.
Example:
State whether the following chemical are salt or not salt..
- barium nitrate _______
- zinc sulphate _______
- aluminium oxide _______
- carbon dioxide _______
- tin nitrate _______
- glucose _______
- ethanol _______
Answer:
Barium nitrate, zinc sulphate and tin nitrate are salts.
Aluminium oxide, carbon dioxide, glucose and ethanol are not salts.
There are 4 types of salt that you need to know in the SPM syllabus:
Four type of Salt, there are:
- Nitrate,
- Chloride,
- Sulphate,
- Carbonate,