Choose your Halloween outfit!
Warning! Only under adult supervision.
- solutions of sodium carbonate;
- citric acid;
- ammonium iron(III) sulfate and potassium hexacyanoferrate(III),;
- plastic backing;
- Halloween stencils;
- spray bottle;
- white short sleeve T-shirt;
- black long sleeve shirt;
- “Infinity Portal” box (MEL Science subscription).
X-ray T-shirt: Attach and press a stencil to a black long sleeve shirt. Apply bleach with a spray bottle. After a while, the image begins to "appear."
Chest reactor: Take the infinity portal from the MEL Science subscription. Use straps to fasten the reactor to your chest.
Cyan jack-o'-lantern: Mix solutions of citric acid, ammonium iron(III) sulfate, ammonium carbonate, and potassium hexacyanoferrate(III) – this creates a photosensitive mixture. Protect the back of a white T-shirt with plastic backing and use a paintbrush to apply the photosensitive mixture to the front. Cover the area soaked in the solution with a stencil and leave it under a lamp.
X-ray T-shirt: Sodium hypochlorite (NaOCl) is most commonly used in bleach. Hypochlorite ions are a strong oxidizing agent; they break down the bonds in the dye molecules, changing their structure and whitening the fabric. Wash your shirt before wearing it.
Chest reactor: A semi-transparent mirrorlets in some light and reflects the rest. The light from the LEDs inside the portal is reflected in the mirrors multiple times. Each reflection is slightly offset from the previous one – this creates the illusion of depth in the image!
Cyan jack-o'-lantern: Under the influence of bright light, the iron(III) ions in the photosensitive mixture begin to actively enter an excited state. At the same time, they oxidize the ions of citric acid, resulting in the formation of a complex mixture of organic substances and iron(II) ions, with which potassium hexacyanoferrate(III) forms an insoluble blue compound: Fe²⁺ + K₃[Fe(CN)₆] → KFe[Fe(CN)₆]↓ + K⁺ This compound is firmly fixed in the fabric fibers, so when rinsed with water, the blue pattern remains!
Even more safe experiments are waiting for you in the MEL Science subscription!