Is titrant known or unknown concentration? (1 Viewer)

[enigma_1]

It's in the burette but I can't find it specifically written as the known or unknown concentration. I'm assuming it's unknown since the thing in the burette is unknown. Is my logic correct?

 

[strawberrye]

The solution in the burette is usually the solution with the unknown concentration.

 

[enigma_1]

So the definition if the titrant is the unknown concentration substance in the burette right?

 

[xGhanem]

Can't the unknown solution can be in either the burette or the Conical Flask, based on personal preference??

 

[QZP]

The solution in the burette is usually the solution with the unknown concentration.

Nope

Can't the unknown solution can be in either the burette or the Conical Flask, based on personal preference??

Yes, but conventionally the conical flask contains the unknown solution and the burette delivers the known solution, hence you should do it this way.

 

[hit patel]

It doesn't matter. As long as you get the stoichiometry right. But personal preference, if one of the solution like NaOH absorbs moisture then use that in the burette as it can be covered by aluminium foil.

 

[hit patel]

Nope

Yes, but conventionally the conical flask contains the unknown solution and the burette delivers the known solution, hence you should do it this way.

And the conical flask conventionally contains the standard solution as far I was taught.

 

[enigma_1]

wow then there's much conflicting thoughts on this. I was taught that the burette holds the unknown concentration and my chem teacher said when you go to uni the burette contains something in particular which I forgot but usually it's not always the unknown. Anyways thanks everyone

 

[strawberrye]

It doesn't matter. As long as you get the stoichiometry right. But personal preference, if one of the solution like NaOH absorbs moisture then use that in the burette as it can be covered by aluminium foil.

Just wanted to point out that NaOH is not used as a primary standard(either as a base or acid) in a typical titration reaction.

 

[someth1ng]

There is no proper convention, which ever method is most convenient because both methods can achieve the exact same result.

With that said, the reason why I tend to prefer having the unknown in the conical flask is because you usually have a limited supply of the unknown solution but you have an effectively unlimited supply of the standard solution. When you put something in a burette, it requires more cleaning and wastage of solution to clean it (rinse with the solution it will hold). Doing that with the standard solution is easy but it's harder to do that with the analyte because you don't have as much of it so you don't want to waste it.