Effervescence Test

EFFERVESCENCE TEST is a fun science experiment for kids to do at home which explains one of the properties of acids and bases. We generally see effervescence while opening a cold-drink bottle after shaking it. Similarly, this experiment will show effervescence with erupting colored volcanoes due to a reaction by using an acid, base, water colors and dishwashing liquid.

Safety First! Adult Supervision Required. Don’t Eat/Drink your Experiments, Wear safety goggles where ever required

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Materials and tools required.

In the box

• Colour Pallete
• Base Powder
• Acid 2 (Vinegar)

Video on Youtube for the Experiment

What to Do!

1. Pour 20 ml of water in 50 ml beaker.
2. Add 4 grams of base 3 in it and mix the solution.
3. Pour the solution in every alternate groove of the color palette.
4. Mix any 5 water colors of your choice in those solutions.
5. Add a drop of liquid soap in each groove.
6. Pour acid 2 in the bigger grooves.
7. Pipette out acid 2 and put 2 ml of it in each smaller grooves.
8. You can see the colors erupting in front of your eyes.

Images for Instructions

Working Principle of Effervescence Test :

In this experiment when we add acid (vinegar or acetic acid) into the base solution (sodium bicarbonate), it leads to rapid production of carbon dioxide (CO₂  gas) which leads to effervescence. This is one of the properties of an acid and base reaction. An acid, when it mixes with a base, it produces effervescence. Effervescence is nothing but escape of gas from an aqueous solution which results in the formation of fizz. This effervescence produces tiny colored volcanoes erupting in the color palette which longs last till the time carbon dioxide keeps on getting released.

These phenomenon is also generally observed when we shake a soft-drink bottle and quickly release its cork, rapid effervescence is observed as CO₂  gas is trapped in the bottle under high pressure.

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