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Ingredients

small drink bottle

60 ml water

1 tablespoon baking soda

1/4 cup vinegar

orange food colouring

few drops of detergent

small square of tissue.

Making the eruption

Place the water, soap, food colouring and vinegar in the drink bottle. Wrap the baking soda in the tissue and drop into the bottle. The volcano model will then erupt.

For extra realism

The volcano can be made more realistic by enclosing the structure in home made play dough. Mix 6 cups of flour, 2 cups of salt, 4 tablespoons of cooking oil, and 2 cups of water in a large bowl. Mix the ingredients by hand until smooth and firm. Build up the mixture around the drink bottle to create the mountain. Lava channels and vegetation can be built around the volcano.

The chemical reaction

NaHCO3 + CH3COOH --> Na+ + H2O + CO2 + CH3COO- Carbon dioxide is released creating the fizz.

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16y ago

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