Login

Search the forums now!

Welcome, Guest. Please login or register.

March 29, 2026, 08:03:46 am
Pages: [1]   Go Down

Author Topic: Back titration for sodium hypochlorite and potassium iodide?  (Read 1457 times)  Share 

0 Members and 1 Guest are viewing this topic.

horizon

  • Victorian
  • Trendsetter
  • **
  • Posts: 179
  • Respect: +1
Back titration for sodium hypochlorite and potassium iodide?
« on: February 22, 2012, 07:37:58 pm »
0
Why is a back titration needed to analyse the sodium hypochlorite content in bleach?
What gives rise for the need to use a back titration in redox titrations?


My notes say that we must first add excess potassium iodide to the solution containing the sodium hypochlorite. 
But can't you just titrate the two directly, using starch as an indicator and stop when it turns blue/black? Is there such thing as a 'broad end point' for redox titrations too?

Many thanks!
Logged
Pages: [1]   Go Up