In this video we do something really silly and remove a can from the coke it contains.
To do the demonstration: First get any soft drink can and using sandpaper, sand off the label. Then open the can and suspend it by the tab in 5% hydrochloric acid. The exact concentration is not critical. The can must be opened or it will rupture as the aluminum is removed.
over the course of an hour, the aluminum in the can will be attacked by the acid and dissolve away. This leaves behind the drink and also a very thin plastic liner inside the can. This liner protects the drink from leaching metals out of the can. Carefully lift the can to reveal the liner still holding the drink.
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https://www.youtube.com/watch?v=X1pB6O6AYMU
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Use the discount code "copper" for a 5% discount.
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In this video we make trimethyl orthoformate.
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https://www.youtube.com/watch?v=TmUNTkP2nw0
One of the most basic pieces of lab equipment is the stir plate. We get a lot people asking how our chemicals magically stir themselves so hopefully this video will shed some light on that.
Now that we've shown you one and what's inside. STOP ASKING ABOUT IT!!!!
:)
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https://www.youtube.com/watch?v=HH57T4w9UHc
In this video we dissolve a Platinum Bar in a combination of hydrochloric and nitric acids better known as aqua regia.
First the 1 ounce platinum bar is covered with 200mL of 12M hydrochloric acid (about 37%). Then 25mL of 15M nitric acid (~70%) is added. The mixture is gently heated to near boiling. The acid will bubble as it reacts. Chemical gas bubbling like this looks more like fizzing and is distinct from boiling. When the bubbling almost stops (~4 hours) add another 25mL of nitric acid. Repeat as necessary. The dissolution is very slow and may take days for a compact bar of platinum. This reaction is usually much quicker for small bits of platinum scrap or powder. If more then 75mL of nitric acid has been added then alternate subsequent acid additions with 50mL hydrochloric acid and 25mL nitric acid. This is because both hydrochloric and nitric acids are consumed in side reactions.
Eventually the platinum will dissolve into a red liquid while hot and when cooled will be an orange liquid. This crude solution of chloroplatinic acid and unreacted nitric and hydrochloric acids may be further processed into purified chloroplatinic acid.
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https://www.youtube.com/watch?v=APxL87X92t4
In this video we show how to use Anodization to give colors to silver coins, also known as toning.
First we mix 200mL of water, 10g of powdered sulfur and 20g of sodium hydroxide and stir for ten minutes or so. This forms a solution of sodium polysulfides.
Then we place in the solution our silver object, in this case a silver coin. We attach the positive terminal of a battery, 1.5 volts is good, to the coin and touch the negative end to solution away from the coin. The silver will get oxidized by the current and form silver sulfide. The layer of silver sulfide imparts color to the coin depending on thickness which is proportional to the time the current is applied.
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https://www.youtube.com/watch?v=GajkqaSr01c
How to Make a Complete and Refillable Glow Stick with a steampunk style to it.
The idea is simple, use compression fittings normally used in plumbing to create a glow stick tube that can be emptied and refilled when the fluid dies.
The vials or ampoules of hydrogen peroxide is created from cheap glass pipettes that are flame sealed.
The other chemicals can be found from our original glow stick reaction video:
http://www.youtube.com/watch?v=kH19EIf5GtE
An important change though is the use of diethyl phthalate solvent rather than ethyl acetate. Diethyl phthalate gives a longer lasting light. Other aliphatic dialkyl phthalates can be used including diethylhexyl phthalate so you can use whatever you have onhand.
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https://www.youtube.com/watch?v=xwi5M1nk6fQ
In this video we use cat litter and drain opener to make sodium silicate. This will be a valuable precursor to other silicon based chemicals in the future.
Most cat litter is made from clay but "crystal" cat litter or "silica" cat litter is made from silica gel. Silica gel is amorphous silicon dioxide made by aqueous chemistry is very easy to convert into other silicon compounds.
The process is quite straightforward: 60g of silica gel based cat litter is mixed with 100mL of water. Then 80g of sodium hydroxide is slowly added to dissolve the silica gel. What's produced is a solution of sodium silicate.
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https://www.youtube.com/watch?v=Ip-jDuM25FE
In this video we make sodium magnesium oxide aggregate. A useful substitute for sodium metal in most cases.
Doing this is very simple, we combine 30g of magnesium metal turnings or powder and 40g of sodium hydroxide in a metal container. The mixture is ignited with sparklers or a fuse and the container is covered with a heavy lid to protect it from air. The mixture will burn and generate hydrogen gas. What's produced is a mixture of sodium metal interspersed with magnesium oxide. While not pure sodium, it has much of the same reactivity and can be used for solvent drying in place of sodium.
Because the aggregate is highly reactive, even toward air, it is recommended to store the aggregate under an inert solvent like toluene or mineral oil.
Related videos:
Nighthawkinlights video on making sodium: https://www.youtube.com/watch?v=seSg_GWj1b0
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https://www.youtube.com/watch?v=ZXCSL0r4aqg
Glassware generously provided by http://www.alchemylabsupply.com/
Use the discount code "copper" for a 5% discount.
Donate to NurdRage!
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Molecular sieves vs. standard methods of solvent drying: http://ccc.chem.pitt.edu/wipf/Web/Solvent_Drying.pdf
This video sponsored by:
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https://www.youtube.com/watch?v=NMfs3e9OdZQ