Thames & Kosmos Glowing Chemistry handleiding

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Thames & Kosmos

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Handleiding

Solution 1

Solution 2

Glowing cube

YOU WILL NEED

› Safety goggles

› Luminol

› Sodium carbonate

› Potassium hexacyanoferrate(III)

› 2 Test tube

› Double-headed measuring spoon

› Pipette

› Petri dish

› 1 sugar cube

HERE’S HOW

1. Prepare Solution

[water + sodium

carbonate + luminol] and Solution

[water +

hydrogen peroxide + potassium

hexacyanoferrate(III)] just as you did in the

previous experiment.

2. Place the sugar cube in the Petri dish and use

the pipette to drip about 15 drops of Solution

onto it. Don’t let the sugar cube dissolve or

crumble in the process.

3. Darken the room, turn on the red light, and

wait a few minutes to get used to the dim

light. Then carefully pour Solution

into the

Petri dish (near its edge) and switch off the red

light.

EXPERIMENT 16

Mysterious Glow

WHAT’S HAPPENING

The sugar cube will start to glow

mysteriously from the bottom. If you

watch for a while, the entire cube will

eventually glow. Sooner or later, it will

fall apart and dissolve. Once again, what

you are witnessing is the chemical

interaction of luminol with hydrogen

peroxide, but the reaction slowed down

because of the sugar crystals. As

everything dissolves into a little

puddle, the liquid around the cube will

glow in addition to the cube itself.

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