What’s hiding inside aluminum cans? Just the drink, or…?
Reagents and equipment: various soft drinks in aluminum cans, sandpaper, beakers, drain cleaner, wooden rods, glass container.
Buff the top layer of paint off of the aluminum cans. Open the cans and use the wooden rods to suspend them in suitably-sized beakers. Add some drain cleaner (usually a 10% sodium or potassium hydroxide solution). Observe a tumultuous reaction and release of gas. Wait two hours. Take the cans out of the liquid. The aluminum may have dissolved, but the drinks haven’t leaked out!
These ordinary aluminum cans are concealing a devious secret – they are covered with a protective layer not only on the outside, but on the inside as well! When we remove their paint coatings, we expose the aluminum, which easily reacts with a drain cleaner that contains an alkaline component. But even when the aluminum has dissolved completely, the drinks will not leak. The cans contain a secret second material – a layer of plastic that keeps the drinks themselves from interacting with the aluminum.
Carbonated drinks contain what are known as “acidity regulators,” the most popular of which are orthophosphoric and citric acids. They are used to acidify foods, giving them a sour and slightly bitter taste. These acids can react with various metals, including the aluminum comprising the soda cans. A special plastic coating is therefore applied to the inside of the cans to prevent the two from interacting. This plastic is most often an epoxy resin (polyethylene, polypropylene, polyester, or other polymers may be used in some cases). These extremely-prevalent epoxy resins contain bisphenol A (BPA), a substance that usually evokes a mixed reaction from consumers. Bisphenol A has the ability to mimic natural human hormones; namely, it is structurally similar to estrogen. Over the past 20 years, it has undergone thorough investigation to determine any effects it may have on the human body. According to extensive research and risk assessments conducted by both governmental and independent organizations worldwide, bisphenol A is safe at normal everyday levels of exposure from food and beverage containers. A Canadian Department of Health report concluded that an average adult would need to consume 940 canned drinks in one day to even get close to the “tolerable daily intake” limit for BPA exposure.
When the aluminum cans are processed for recycling, the films burn up at the high temperatures in the convection furnaces.
2Al 2NaOH 6H2O = 2Na[Al(OH)4] 3H2
Safety precautions: wear protective gloves, glasses, and a mask. Work in a well-ventilated area. Perform this experiment under adult supervision only!
11 views
33
8
1 month ago 00:27:21 1
When Shoegaze Meets Electronica
2 months ago 00:09:27 1
China Takes LEAD in EUV Technology with 6 Self Developed Machines!
2 months ago 00:26:34 31
Beat making tutorial with BAM - Beat Maker & Music Maker
2 months ago 00:56:47 3
Penn Badgley, Are We Confusing YOU w/ Real Love? TV Fantasies vs. True Bond w/ Dr. Nura | Soul Boom
2 months ago 00:11:38 1
Bashar Beethoven Meditative 3xLoop - 7th Symphony 2nd Movement Allegretto
2 months ago 00:26:49 1
Massive Pre-Historic Mega Structure That CAN NOT Be Explained
2 months ago 00:20:31 1
Perfect Morning Breathwork to Lower Stress & Boost Energy | 15 Minute Routine
2 months ago 00:13:35 1
Russia’s DONE With G7 Gold - BRICS Precious Metals Exchange Threatens The U.S. & UK
2 months ago 00:13:34 1
G7 Banking Giant Joins China’s RMB Payments System, Bypassing USD In Global Trade
2 months ago 00:03:21 9
KARDS ’Blood and Iron’ - Winter Expansion 2024 - Development teaser I
2 months ago 00:27:55 1
Massive Pre-Historic Artifacts in Japan That Should NOT Exist
2 months ago 00:03:34 1
2 Minute Diet - What is the Okinawa Diet? *Blue Zone Diets and Living to 100*
2 months ago 00:25:37 4
Deuce Formerly From Hollywood Undead | Interview 2024 - Episode 1
2 months ago 00:01:45 1
SPIDER-MAN 4 (2026) - First Trailer | Tom Holland
2 months ago 00:05:18 1
BTS - Cypher Pt. 4 live from The Wings Tour 2017 [ENG SUB] [Full HD]
2 months ago 00:21:01 1
Why Chosen Ones Are LEAVING The CHURCH
2 months ago 00:02:04 1
Dead Island 2 Ultimate Edition - Launch Trailer | PS5 Games
2 months ago 00:36:37 1
Pre-Egyptian Megastructure Built BEFORE The Great Flood
2 months ago 00:44:31 1
Vatican Secrets Revealed - Forbidden History - S04 EP02 - History Documentary
2 months ago 00:00:00 1
Find DEEPER Meaning in Life Through Worship Music
2 months ago 01:40:39 1
John Digweed - Live in Stereo Mini Mix Preview 2024-10-17 with tracklist
2 months ago 00:01:28 1
Firecracker Trailer #1 (2024) | Vudu
2 months ago 03:04:07 1
Gods Promises | 100+ Healing Scriptures With Soaking Music | Christian Meditation
2 months ago 01:30:02 1
Best classical music. Music for the soul: Beethoven, Mozart, Schubert, Chopin, Bach ... 🎶🎶