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What is a Salt?

In this worksheet, students will explore the many types of salt produced in reactions between acids and alkalis.

'What is a Salt?' worksheet

Key stage:  KS 3

Curriculum topic:   Chemistry: Chemical Reactions

Curriculum subtopic:   Reactions of Acids with Alkalis

Difficulty level:  

Worksheet Overview

QUESTION 1 of 10

The salt that you put on your chips has the chemical name sodium chloride. This, however, is only one example of the many different salts in chemistry.

 

Salt

 

 

A salt (not to be confused with assault!) is the product of a neutralisation reaction between an acid and a base. A base is a substance that neutralises an acid. Examples of bases include alkalis, metal oxides etc.

When an acid is neutralised, the metal ion from the base (in red below) combines with the negative ion from the acid (in blue below) to form a salt.

 

For example:

sodium hydroxide + hydrochloric acid sodium chloride + water

calcium oxide + nitric acid calcium nitrate + water

magnesium + sulfuric acid magnesium sulfate + water

 

The three equations shown above give examples of the salts produced from the three main acids: hydrochloric, sulfuric and nitric. These acids are the most commonly used in the science lab, which makes it important to learn their names and the salts produced by their reactions:

 

hydrochloric acid (HCl) - produces chloride salts 

sulfuric acid (H2SO4) - produces sulfate salts

nitric acid (HNO3) - produces nitrate salts

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