Properties of Acids and Bases Explained

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Properties of Acids and Bases

What do you already know about acids and bases?

Learning Objective

At the end of the lesson you will be able to describe and compare the main properties of acids and bases, give examples, and explain their uses.

What is an Acid?

Acids are substances that taste sour, react with metals, and turn blue litmus paper red. Common examples include lemon juice and vinegar.

What is a Base?

Bases feel slippery, taste bitter, and turn red litmus paper blue. Soap and baking soda are everyday examples.

Comparing Acids and Bases

Acids

Bases

Bitter taste pH greater than 7 Turns red litmus blue

Sour taste pH less than 7 Turns blue litmus red

Testing with Litmus Paper

Litmus paper helps identify acids and bases by changing colour. Acid turns blue litmus red, base turns red litmus blue.

Real-life Uses

Acids help in food preservation and cleaning. Bases are used in soaps, detergents, and antacids.

Summary and Reflection

We explored the properties, testing methods, and uses of acids and bases. Can you name more examples from your environment?

Write down 3 things you learned in this lesson.

Write down 2 things you want to know more about.

Ask 1 question about something you haven't quite understood yet.