Just one sec...
Hey! Sign in to get help with your study questionsNew here? Join for free to post

Kinetics of the reaction between Iodide and Persulphate ions?

Announcements Posted on
At uni or currently applying? Take our short accommodation survey to win one of 5 x £20 Amazon vouchers 25-06-2016
  1. Offline

    ReputationRep:
    Hi there! I'm new here and I was wondering if anyone can help me.

    I am investigating the kinetics of the reaction of iodide and persulphate ions but I am really struggling to work out teh concentrations and volumes I need. My teacher says that as I am changing the concentration of the KI, the Peroxidisulphate needs to be at least 10 times in excess. But how do I work this out. I ahev had one failed attempt so far when I worked out that I would need 4cm of 0.01M KI, 2cm 0f 0.1M s2O8 and 1 cm of 0.1M Thiosulphate and 1cm of Starch. This reaction did not work at all and still probably hasn't changed colour form clear to Blue.

    So how can I work it out? Thanks in advance!

Reply

Submit reply

Register

Thanks for posting! You just need to create an account in order to submit the post
  1. this can't be left blank
    that username has been taken, please choose another Forgotten your password?
  2. this can't be left blank
    this email is already registered. Forgotten your password?
  3. this can't be left blank

    6 characters or longer with both numbers and letters is safer

  4. this can't be left empty
    your full birthday is required
  1. Oops, you need to agree to our Ts&Cs to register
  2. Slide to join now Processing…

Updated: June 29, 2009
TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

Poll
Which way did you want the referendum to go?

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22

Registered Office: International House, Queens Road, Brighton, BN1 3XE

Quick reply
Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.