Acids and bases

What you'll learn

1. 1

   Imagine a glass of 🍋 lemonade — it tastes sour, right? That's because it has an acid inside it.

2. 2

   Which of these is an acid? 🍋

3. 3

   Drag the pH scale to show where lemon juice belongs — it's an acid, so it should be on the left side.

4. 4

   Let's test a mystery liquid 🧪 — it turns blue litmus paper red. What is it?

5. 5

   What colour does blue litmus paper turn in an acid? 🧪

6. 6

   Tap the correct label for this liquid: it has pH 12, feels slippery, and turns red litmus paper blue.

7. 7

   What pH number is neutral (not acid or base)? 🌊