Hi and welcome back to my channel. Today we're going to be looking at oxidizing alcohols. We're going to look at the practical process of using mild oxidation agents. When you're using these mild oxidizing agents, you first need to boil some water and then switch off your binsen as they're all flammable. This then allows the water to cool down to around 80 degrees.
We're going to look at three oxidizing agents. The first that we're going to look at is acidified potassium dichromate. Acidified potassium dichromate is orange. We're also going to look at phalings, which is blue, and tolins, which is colourless. We're going to put these three oxidising agents into the water bath.
Inside, with the oxidising agents, we've put in an aldehyde. Aldehydes can be oxidised to carboxylic acids. Ketones cannot.
We allow the chemical reaction to take place over a few minutes in the hot water bath. The reaction is complete, we can have a look at the results. Phalanx turns from blue to a brick red. Dichromate turns from orange to a blue-green. And tolanx turns from colourless to a silver-mirror or a dark brown.
These are the colour changes for a positive result with dichromate, tolanx and phalanx. The colour change with phalanx is due to the reduction of the copper 2 plus ions to copper 1 plus ions. The colour change with toluenes is due to the reduction of silver ions to silver atoms and the colour change with acidified potassium dichromate is due to the reduction of dichromate ions to chromium ions.
In the next clip decide whether compound X or compound Y is an aldehyde Compound X showed no reaction with any of the oxidizing agents. This means that compound X was a ketone. Compound Y had a colour change for all three of the oxidizing agents.
This means that compound Y was an aldehyde. Thank you for watching my video. Please remember to subscribe and ring the bell to be notified of new videos.
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