🧪 Part 1: Bath Bomb Chemistry Knowledge

1. What are the two main ingredients that cause a bath bomb to fizz?

Sodium bicarbonate and citric acid

Salt and sugar

Soap and water

Oil and vinegar

2. Sodium bicarbonate is classified as:

An acid

A base

Neutral

A salt

3. What gas is produced when a bath bomb dissolves in water?

Oxygen

Hydrogen

Carbon dioxide

Nitrogen

4. Which safety precautions should you follow when making bath bombs? (Select all that apply)

Wear safety goggles

Work in a well-ventilated area

Avoid inhaling powder

Wash hands thoroughly afterwards

📝 Part 2: Understanding the Reaction

5. Complete the word equation for the bath bomb reaction:

Sodium bicarbonate + Citric acid + Water → _____________ + _____________ + _____________

6. Explain why bath bombs only start fizzing when they come into contact with water:

7. Why do we add cornflour or arrowroot powder to bath bomb mixtures?

8. What would happen if you used too much citric acid compared to sodium bicarbonate? Explain your answer:

🔬 Part 3: Practical Prediction Activity

9. You are making bath bombs with the following recipe:

Recipe: 100g sodium bicarbonate, 50g citric acid, 25g cornflour, 10ml essential oil, food colouring

Scenario: You add 2ml of water accidentally to your dry mixture before moulding.

Predict: What will happen and why?

10. Design a simple test to show that carbon dioxide is being produced when your bath bomb dissolves. Describe your method:

Bath Bomb Chemistry Worksheet

Bath Bomb Chemistry Worksheet

🧪 Part 1: Bath Bomb Chemistry Knowledge

📝 Part 2: Understanding the Reaction

🔬 Part 3: Practical Prediction Activity

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