The Magic Water Experiment

Hello everyone! Welcome to Station 2 — Magic Water!

My name is Jacob, and these are my friends Chisa, Note, and Krin. We are going to help you with today's activity.

So, what are we going to do today?

Today, we are going to use purple cabbage water to test three different liquids. We will find out if they are acidic, neutral, or basic.

First, let's talk about the science behind this experiment.

Purple cabbage contains a natural substance called anthocyanin. Anthocyanin works as an indicator. An indicator is a substance that changes color when it comes into contact with substances that have different pH levels.

pH tells us if something is acidic, neutral, or basic. A low pH means acidic, a pH around 7 is neutral, and a high pH means basic.

When we add purple cabbage water to a liquid, the anthocyanin reacts with it. This makes the color change. By looking at the new color, we can learn about the pH of that liquid.

Now, let's see what colors we can get!

The color changes depending on the pH of the liquid.

If the liquid is acidic, the purple cabbage water can change to red or pink.

If the liquid is neutral, it usually stays purple, which is close to the original color.

And if the liquid is basic, it can change to blue or green.

So, the color helps us know if the liquid is acidic, neutral, or basic.

Now, let's look at the liquids we are going to test.

We have three clear liquids: vinegar, water, and salt water.

They all look quite similar, so it can be hard to tell them apart just by looking.

That's why we are going to use purple cabbage water to test them.

We will add the cabbage water to each liquid and watch for the color change.

Now, I will explain the experiment.

Now it's your turn! Test all three glasses and put them in the correct places on the paper.