The Backyard Scientist attempted to create a water gun that shoots a constant stream of foam, similar to the "Elephant's Toothpaste" experiment. However, he encountered problems with the original formula being too slow and potentially explosive. He investigated Mark Rober's "Devil's Toothpaste" formula, which reacted much faster, and discovered clues that suggested the use of potassium iodide. The scientist experimented with different concentrations of hydrogen peroxide and created a reaction chamber to improve the foam's expansion. After several trials, he finally succeeded in creating a handheld foam gun using 30% hydrogen peroxide, but not before experiencing a close call when the tank ruptured due to a reaction with the brass fittings.
Here are the key facts extracted from the text:
1. The video is sponsored by Ren.
2. The Backyard Scientist has been working on an elephant's toothpaste water gun for a month.
3. The elephant's toothpaste experiment involves mixing two chemicals to create foam.
4. The Backyard Scientist tried to create a nozzle to mix the chemicals in the air but it didn't work due to the slow reaction time.
5. Mark Rober has a secret formula for "Devil's Toothpaste" that reacts faster than normal elephant's toothpaste.
6. Mark Rober refuses to share his secret formula because he claims it's too dangerous.
7. The Backyard Scientist analyzed Mark Rober's videos and found clues to the secret formula.
8. The first clue is that Mark Rober adds potassium iodide to his normal elephant's toothpaste.
9. The potassium iodide turns yellow when exposed to air and reacts with oxygen to create iodine.
10. The Backyard Scientist tested potassium iodide and found that it doesn't react with hydrogen peroxide to create the same effect as Devil's Toothpaste.
11. Mark Rober's Devil's Toothpaste formula is likely different from the normal elephant's toothpaste formula.
12. The Backyard Scientist suspects that Mark Rober is using a higher concentration of hydrogen peroxide.
13. High-strength hydrogen peroxide is really dangerous and can react with wood, rocks, and other materials.
14. The Backyard Scientist tried to concentrate hydrogen peroxide by evaporating it.
15. The concentrated peroxide reacts faster than the normal elephant's toothpaste formula.
16. The Backyard Scientist created a reaction chamber to mix the chemicals and improve the performance of the water gun.
17. The reaction chamber uses a tube to shoot the mixture onto the walls of the chamber, creating foam that expands and shoots out under its own pressure.
18. The Backyard Scientist tested the water gun with the reaction chamber and found that it works better with 30% hydrogen peroxide.
19. The Backyard Scientist wants to try the water gun with 60% hydrogen peroxide but is scared of the potential risks.
20. The water gun exploded due to the peroxide reacting with the brass fittings or something else.
21. The Backyard Scientist rebuilt the tank and went back to a safer concentration of 30% peroxide.
22. The Backyard Scientist successfully created a handheld foam gun using the reaction chamber and 30% peroxide.