Which beverage would you rather drink: milk, soda, water, or orange juice? Each one of these liquids tastes very different. Why? Because they all have different levels of chemicals called acids and bases. In this video for kids, you will learn why liquids, and even the foods you eat, taste a certain way.
Acids tend to be on the sour side. In fact, the more acidic something is, the more sour it will taste. Bases, on the other hand, taste bitter. The more basic (or alkaline) a substance, the more bitter it will be. Lemon juice is a great example of a very acidic liquid. Almond milk is a great example of a basic liquid.
When something is acidic, the molecules split apart and release hydrogen ions. Molecules of basic substances split apart and release hydroxide ions and reduce the number of hydrogen ions. A higher number of hydrogen ions yields a more acidic solution while a higher number of hydroxide ions yields a more basic or alkaline solution.
Examples of acids and bases are everywhere. Apart from the liquids we drink, acids are also found in car batteries, and bases are often found in household cleaning products. In addition, our bodies contain both acids and bases. The stomach has hydrochloric acid to help digest food and kill bad bacteria. The pancreas contains a base that helps with digestion as well.
You will also learn about the pH scale and about indicators. The pH scale measures the level of acidity or base, or number of hydrogen ions, in a specific substance. The scale goes from 0 to 14, with numbers between 0–7 indicating acids and between 7–14 indicating bases. Litmus paper is one of the most common indicators. When put in a solution, it will turn red to indicate an acid or blue to indicate a base.
We hope you and your student(s) enjoyed learning about these interesting chemicals! If you want to learn even more, head over to our website and download one of our many free lesson plans, full of activities, worksheets, and more!
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What you will learn in Acids and Bases for Kids:
0:00 Introduction to acids and bases
0:51 Comparing lemon juice to almond milk
1:45 Examples of acids and what acid means
3:13 Examples of bases and what a base is
4:27 The pH scale
5:57 How acids and bases can neutralize each other
6:39 What is an indicator?
7:22 Using litmus paper to test lemon juice and almond milk
7:56 Review of the facts
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