Extracting Oxalic acid from rhubarb leaves.

Hi all,
I have had a request from a student for the above practical.
I have sent him off to find a good method but obviously I need to look into this myself.
Does anyone have any advice, methods, top tips?

Thanks in advance.
 
I remember doing this practical as my first A level chemistry practical back in 1975 it involved extracting the oxalic acid from a weighed sample of rhubarb leaf, with hot water, making it up in a volumetric flask, and doing a potassium permaganate titration. - don't have the method anymore, though, sorry.
 
I remember doing this practical as my first A level chemistry practical back in 1975 it involved extracting the oxalic acid from a weighed sample of rhubarb leaf, with hot water, making it up in a volumetric flask, and doing a potassium permaganate titration. - don't have the method anymore, though, sorry.
Hi John J,
Sounds similar to what we are planning, thanks.
 

ajmc98

Don't lick, smell or touch it and you won't die.
I think the oxalic acid content of rhubarb leaves is between 0.5-1% so might be an idea to get a decent amount of leaves depending on your class sizes.
 
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