Jump to content
bmeekins

Quantification of bromine (Br2)

Recommended Posts

I'm new to these forums, but I'm hoping I might be able to get some help with a problem I'm having. I'm working on a project that will (hopefully) produce a continuous stream of bromine via electrolysis of anhydrous hydrogen bromide gas. The actual process of doing the electrolysis is not overly difficult, but I'm trying to come up with a good way to quantify the amount of bromine that is produced so that we can determine the Faradaic efficiency of the reaction. In looking through the literature, it seems that I could try and do some kind of colorimetric measurement or bubble the product stream through an organic solvent, but in each case I'm concerned that the amount of bromine will be under-reported.

Any suggestions on how I might tackle this? Thanks!

Share this post


Link to post
Share on other sites
2 hours ago, bmeekins said:

I'm concerned that the amount of bromine will be under-reported.

Why?

In any event, you can check by titration.

2 hours ago, bmeekins said:

electrolysis of anhydrous hydrogen bromide gas.

HBr does not conduct.

Share this post


Link to post
Share on other sites
1 minute ago, John Cuthber said:

Why?

In any event, you can check by titration.

 

Because, as stated, we want to determine the Faradaic efficiency of the reaction. Such a calculation requires precise determination of the number of mols of product so we can compare it accurately with the total charge passed. If the amount of Br2 measured is lower than the actual amount made, our apparent Faradaic efficiency will be less than the actual value.

Share this post


Link to post
Share on other sites
12 hours ago, bmeekins said:

If the amount of Br2 measured is lower

Why would it be?

Are you assuming you can't get the right answer?

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.