Thames & Kosmos Wow in the World: Everlasting Volcano handleiding

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Thames & Kosmos

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Handleiding

VINEGAR AND BAKING SODA ERUPTION

Place the volcano on a

at surface that can get

messy. Put newspaper

or paper towels under it.

With the beaker, measure

10 ml of baking soda.

Pour it into the crater.

Fill the beaker as follows: rst, to the

10-ml mark with dishwashing

detergent; second, to the 30-ml

mark with water; third, to the

90-ml mark with

white vinegar; and

nally, add 20

drops of red

food coloring.

Pour the liquid from the beaker onto the

baking soda in the crater. The mixture will

immediately foam up

and erupt out of the

crater.

Note: You do

not use the lava

lever with this

eruption.

The mixture foams up vigorously because

the vinegar is an acid and

the baking soda is a base.

When acids and bases combine, a chemical

reaction that releases carbon dioxide gas occurs. The dishwashing

detergent surrounds the bubbles with a protective layer, making the

bubbles last longer, resulting in the foam. These bubbles don’t contain

normal air, but rather carbon dioxide formed from the reaction.

What’s

going

on her?

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