why is the KMnO4 solution filtred ?

[Joumana]

Hi,

 

In chemisty lab ,in the expirament of Oxidiation-Reduction titrations| : determination of Oxalate.

 

the equestion is :

why is the KMnO4 solution filtred ?? and why should it not be stored in rubber-stoppered bottle ??

 

Joumana

[hermanntrude]

the usual reason for filtering something is to remove any solids. Without more details it's hard to tell in this particular example.

 

KMnO4 is a strong oxidiser. what do you think it might do to rubber? and what do you think that might do to the KMnO4?

[sivas54]

KMnO4 in neutral aqueous solution is not stable. It slowly gets converted into MnO2. If MnO2 is not filtered out , MnO2 will interfere with all colorimetry expts and also the regular chemical reactions.

[Joumana]

(hermanntrude)

I think, it will interacte with the rubber becuase it's strong oxidaser.

you led me to ask more ^^ ..

what's the reaction will happen btw them ??

 

 

( sivas ) thank you

[hermanntrude]

i'm not sure of the exact reaction but I wouldnt be surprised if it did indeed oxidise the rubber, and by doing so, be reduced itself. probably to MnO2 and some potassium salt. I'm just guessing, though.