after using NaOH to hydrolyze, it should probably be pH adjusted back, or buffered back with swamping in a buffer that doesn't react with FeIII (no citrate, phosphate.. actually simply hitting it with 10% sulfuric should bring the pH near 1-2, where the reaction happens. Above pH 3 to 5 (depending on ferric concentration) rust hydroxide precipitates no matter what... so the higher than 2 pH citrate and phosphate buffers wouldn't work even if they didn't react with ferric..

Cool video.

Paracetamol is a phenol itself and codeine is an aryl ether so it might be hydrolysed to a phenol.

@sciocleseus I think that's a great idea... equations and numbers are better pictured, then talking through them showing with a pencil tip

interesting, thanx

great intro. yes that stuff is a bit complicated for me.

Loved the blooper at the end.. lol...

that's great. a drug test i can do on my self. Main OTC pain killer i take is 2x 500mg paracetamol/10mg codeine phosphate. Is there a easy urine test i can use for either the paracetamol or the codeine? Thanks

Was cleraning out gmail, and according to doubleu.sciencedirectdotom/science/article/pii/0304416574900713 abstract, in the absence of phos, iron salicylate forms even at pH 9. A standard NaOH digest then ferric would give an unreproducible brown sludge as blank, or simply ferric into random pH unbuffered samples might, and pH 2 would help there, but sulfuric lacks buffer capacity at pH 2, and since salycilate is such a strong complexer, weaker complexers such as low pH citrate might work fine.

I highly recommend using a whiteboard or just a piece of paper to write your mathematics and chemical equations down, otherwise it is hard to follow when you just say it. very interesting videos though :)