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Bath Bomb Chemistry Reactions

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Bath Bomb Chemistry Reactions

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Bath bomb fizzing in water

🧪 Part 1: Understanding Chemical Reactions

What is a Chemical Reaction?
A chemical reaction happens when substances mix together to form new substances with different properties. In bath bombs, we see a special type called an acid-base reaction.

1. What happens during a chemical reaction?

Substances change colour only

New substances are formed

Nothing changes at all

Only the temperature changes

2. The main ingredients in a bath bomb are:

Sodium bicarbonate (baking soda)

Citric acid

Salt

Essential oils

3. Fill in the blanks:

When sodium bicarbonate mixes with citric acid in water, they react to produce __________ gas, which creates the fizzing effect. This type of reaction is called an __________-__________ reaction.

⚗️ Part 2: The Science Behind Bath Bombs

The Chemical Equation:
Sodium Bicarbonate + Citric Acid + Water → Carbon Dioxide + Water + Sodium Citrate

4. In the bath bomb reaction, which are the reactants (starting materials)?

Carbon dioxide and water

Sodium bicarbonate and citric acid

Essential oils and food colouring

Sodium citrate only

5. What gas is produced that makes the bath bomb fizz?

Oxygen

Hydrogen

Carbon dioxide

Nitrogen

6. Predict what would happen if you added more citric acid to your bath bomb recipe:

🔬 Part 3: Safe Observation Activity

Simple Experiment: Mix 1 teaspoon of baking soda with 1 teaspoon of citric acid in a clear glass. Add a small amount of water and observe.

7. What did you observe when the ingredients mixed with water?

8. Why doesn't the reaction happen when the powders are dry?

The powders are too cold

Water is needed to start the reaction

The powders need to be heated first

There's not enough oxygen present

9. Explain in your own words why bath bombs are stored in dry conditions:

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