Thames & Kosmos Kids First: Crystals, Rocks & Minerals handleiding

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Thames & Kosmos

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Handleiding

WHAT’S HAPPENING

Copper sulfate forms clear blue

crystals. They look like someone

grabbed a brick by one corner and

pulled it lengthwise.

ABOUT

COPPER

SULFATE

The blue substance

is produced from

copper sulfate in

large quantities, and

serves as a pesticide

in wine production

and to combat

algae in swimming

pools — it is a

powerful poison to

microorganisms. This

copper salt is also

used to copper coat

objects and to clean

copper metal.

Crystals of blue

YOU WILL NEED

› Copper sulfate

› Small measuring cup

› Double-ended measuring spoon

› Wooden spatula

› Display box

› Old glass jelly jar

› Distilled water

› Sheet of paper

› Pencil

HERE’S HOW

1. Dissolve 16 small spoonfuls of copper

sulfate in 10 ml water.

2. Let the solution stand uncovered for a few

days in a protected location. It will

evaporate and form blue crystals with a

characteristic shape. Use the paper and pen

to make a label for the solution.

3. After the crystals have formed, pour the

solution into a jelly jar and label it.

4. Take out the prettiest crystals with the help

of the measuring spoon, and save them in

your box.

5. The rest of the solution has to evaporate

completely. Return the dry copper sulfate

to the vial.

For copper sulfate, note the

information about hazardous

substances on page 6.

10 ml



Homemade Crystals

EXPERIMENT 3

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