I really enjoyed this practical to make Fizzing Bath Bombs because it was hands-on and allowed us to see a chemical reaction in action. One of my favourite parts was mixing the oil and colour and then watching the reaction happen, when the bath bomb was placed in water. It fizzed just like I hoped it would, which felt really satisfying after all the careful mixing.

I found that adding the oil slowly was a bit tricky at first – it was important to go slow so that the mixture didn't start reacting too early. Moulding the bath bomb was also a bit of a challenge to get the shape right, but with practice, it came together well.

Overall, I was really happy with how my bath bomb turned out. It held its shape, and fizzed effectively.

This is how we did it...

For this practical, we made bath bombs using a mixture of dry and wet ingredients. The equipment we used included a beaker, stirring rod, spoon, and gloves. The ingredients were:

• • 100g bicarbonate of soda
• • 50g citric acid
• • 25g cornflour
• • 2 tbsp oil
• • A few drops of liquid food colouring

1. We began by measuring and adding the bicarbonate of soda, citric acid, and corn flour into a beaker. Using the stirring rod, we mixed them thoroughly until all the powders were evenly combined.

2. In a separate small bowl, we mixed the oil with a few drops of food colouring. We stirred well to try and evenly combine the colour into the oil.

3. Slowly, we added the coloured oil mixture into the dry ingredients, a little at a time, whisking between each addition to prevent the mixture from reacting too early.

4. Once all the ingredients were combined and the mixture had a texture like damp sand, we used gloves to press and mould it into a ball shape.

5. The bath bomb was then set aside to dry and later tested by dropping it into water – where it fizzed nicely!

Japji Kaur [8G]