“Disappearing spoon” experiment
How to make a spoon which dissolves in hot water
Do you want to trick your friends, but don’t know how? In this experiment, we’ll show you an incredible property of gallium!
After working with gallium, rinse everything with alcohol, and then with soap and water. Liquid in which gallium has melted must not be consumed.
Warning! Only under adults supervision.
Reagents and equipment:
- silicone sealant;
- plastic container;
- box cutter;
- rubber bands.
Squeeze silicone sealant into the container – the layer should be about 2 cm thick. Spread the sealant evenly with a spatula and place an ordinary teaspoon on it. Put a match under the edge of the spoon to the wall of the container – it will make the cavity into which we will later pour melted metal. Add another layer of sealant, even it out and leave to dry at room temperature for 2 weeks.
After the silicone is completely dry, take out of the mold, cut it open carefully and remove the spoon and match. Place the two halves of the mold together and fix them together with rubber bands, to ensure there is no leakage. Take an ampule containing gallium and immerse in hot water. Collect the melted gallium in a syringe and squeeze it into the hollow that we made previously. Put in the fridge for 20 minutes.
Remove the rubber bands and carefully take out the spoon – it doesn’t look any different from an ordinary one. Invite your friends around for tea and watch their amazed faces. Just make sure they don’t drink the tea – it has a nasty taste and isn’t good for you!