In this video we make a chemical solution that changes color when exposed to air and reverses when sealed away from air.
In a vial about 20 mL in volume. Add 200 mg of copper chloride, 10 mL of hydrochloric acid (20% or higher in concentration) and 2 g copper metal. Seal the vial and let it sit overnight. It helps to include a stir bar and stir the solution overnight.
What's happening is the copper metal is reacting with the copper (II) chloride in solution to produce copper (I) chloride. This reaction is called comproportionation where the same substance in two different oxidation states react to form a single substance of intermediate oxidation.
Eventually the solution will go clear as all the copper (II) ions are converted to colorless copper (I) chloride.
To observe the air sensitive reaction, simply open the cap and let the solution sit on air. Oxygen in the air will react with the copper (I) ions to convert them to copper (II) ions which are green in hydrochloric acid. ... https://www.youtube.com/watch?v=W_P2hdsJAaY
In this video we make ammonia gas and dissolve it water from various chemicals easily accessible to the amateur.
The first method is merely boiling household ammonia solution that's domestically available from the local supermarket. The ammonia boiled out is lead into cold water where it can be dissolved. While this did work the yield was quite low at around 2.5g per 100mL of household ammonia solution. From the 600mL of ammonia solution used only about 15g was obtained.
The second method was to revisit the classic method to produce sodium nitrate from ammonium nitrate and sodium hydroxide by dissolving them both separately in water and then mixing them together and trying to boil out the ammonia. This worked terribly and i got almost no yield at all.
The third method that seemed to work the best was to react urea and sodium hydroxide in water. This reaction was well-behaved, steady and easily performed with domestically available chemicals. Starting from 200mL water, 90g urea and 120g sodium hydroxide, about 38.6g of ammonia was obtained.
I intend to use the ammonia in a future project to make nitric acid.
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https://www.youtube.com/watch?v=0-jJ5QF-EVE
In this video, we make isopropyl nitrite without using sodium nitrite.
Typically, amateur chemists use sodium nitrite, hydrochloric acid, and isopropyl alcohol for this process, but sodium nitrite is becoming harder to obtain. This sodium nitrite-free pathway goes through nitrosylsulfuric acid which can be made using more easily obtained fuming nitric acid and sulfur dioxide.
To make fuming nitric acid from you can use this video: https://youtu.be/88gbfCnrV8o
How to make sulfur dioxide: https://youtu.be/2AFKlLSwUZ4
To begin, we dry 400mL of 99% isopropyl alcohol using molecular sieves 3A (that itself was previously dried at 200 Celsius). In a separate flask, we mix 63g of fuming nitric acid with 150mL of glacial acetic acid, keeping the mixture cool in an ice bath.
To make glacial acetic acid, i refer you to Nile Red: https://www.youtube.com/watch?v=8iG_qnkF08Y
or Amateur chemistry:
https://www.youtube.com/watch?v=FOb4R5_LK-I
Meanwhile, a sulfur dioxide is injected from a sulfur dioxide generator into our nitric acid mixture forming nitrosylsulfuric acid.
After the reaction, the nitrosylsulfuric acid precipitates out. It's filtered and i got a Yield of 117g or 91%. Due to its instability, it must be used promptly. It's slowly combined with chilled isopropanol, creating isopropyl nitrite. Careful addition and temperature control are crucial to prevent decomposition.
After the reaction, we add ice and make up the volume to 1L to separate the isopropyl nitrite. A separatory funnel is used to recover the lighter organic phase of isopropyl nitrite. The final yield is 56g or about 63% based on nitric acid, with an adjusted yield of 69% based on nitrosylsulfuric acid quantity.
While this method may not match the ease of sodium nitrite-based processes, it serves as a valuable alternative for those facing sodium nitrite availability challenges.
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https://www.youtube.com/watch?v=aT1Bylf1_00
We process the products of dissolving platinum in aqua regia to make chloroplatinic acid.
First we reacted 31.1g of platinum with aqua regia as seen here: http://www.youtube.com/watch?v=APxL87X92t4
That solution contains unreacted nitric acid so we must destroy that. To do this we first reduce volume of the platinum containing solution by evaporating or boiling. Once it's down to less than 100mL and cooled to room temperature we add in 100mL of 15M hydrochloric acid. Then we boil the solution. The solution should be covered with an empty round bottom flask to prevent splashing out of the valuable platinum. As it boils the leftover nitric acid is reacted with the hydrochloric acid to produce nitrogen dioxide, nitrosyl chloride and chlorine gases. A yellow orange or brown gas coming from the solution indicates the reaction is occurring. We keep boiling until the solution is back down to 100mL and then allow to cool. If the gases were observed then another 100mL of hydrochloric acid should be added again and the boiling down repeated. This process should be performed as often as necessary until no gases are observed.
Once all the traces of nitric acid are destroyed the solution is reduced down to ~ 50mL and allowed to dry. Since chloroplatinic acid is extremely hygroscopic I recommend using a desiccator bag or a vacuum desiccator to dry it.
Eventually it will crystallize to an orange solid. Break it up and store it in air-tight containers away from light.
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https://www.youtube.com/watch?v=MlMj3VEYBMA
In this video we revisit making silver nitrate by the classic reaction of silver and nitric acid.
Related videos:
The original video of making silver nitrate: https://www.youtube.com/watch?v=d6hPgGV_qAg
Very simple silver photography: https://www.youtube.com/watch?v=8e0-AbwBDYM
Silver conductive ink: https://www.youtube.com/watch?v=EBlqPS8boLI
Silver mirrors: https://www.youtube.com/watch?v=hUX_cpFWNso
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https://www.youtube.com/watch?v=U8v2zbUYBgw
In this video we make dimethyl dioxane from propylene glycol based antifreeze.
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...
https://www.youtube.com/watch?v=Soc4uR6Zpc4
We show how to make an Aluminum Air Battery
"Air" batteries are batteries that use oxygen from the air as an oxidant for their chemistry. Most batteries on the other hand carry another chemical as their oxidant. Air batteries are currently being researched by scientists as a means of energy storage for everything from cars to laptops.
The aluminum air battery is one of the simplest to make. To do just mix 60 grams of salt with 300mL of water. Then attach wires to a ball of aluminum foil and a piece of steel wool. Put the aluminum in the bottom of the salt water and place a paper towel over it. Then place the steel wool on top.
You now have an aluminum air battery. The iron in the steel catalyzes the reaction of oxygen with water to make hydroxide and the aluminum reacts with the hydroxide to make aluminum oxide.
The power isn't very good because aluminum metal tends to passivate under these conditions. Better chemicals and electrode materials usually fix these issues, but that's beyond the ability of the home lab.
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https://www.youtube.com/watch?v=_FxIzMwOF00
Using sodium hydroxide (drain cleaner) we dissolve glass.
Glass is nearly invulnerable to chemicals and thus why it's the preferred material for chemical containers and reaction vessels. But when exposed to molten sodium hydroxide even glass will dissolve.
To perform the reaction a steel container is used as it's resistant to the sodium hydroxide.
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https://www.youtube.com/watch?v=nmktRTHL1NA
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Burn Steel wool: https://www.youtube.com/watch?v=5MDH92VxPEQ
Make thermite: https://www.youtube.com/watch?v=RiF73l4PjyY
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https://www.youtube.com/watch?v=vPnqLSyoEy8
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My old videos on sodium acetate trihydrate:
https://www.youtube.com/watch?v=Yxk3OZWq9Ls
https://www.youtube.com/watch?v=CAwxhAP9mnc
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https://www.youtube.com/watch?v=gBtDp8E7RcU