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Chemistry Forums for Students => Analytical Chemistry Forum => Topic started by: sophie on September 16, 2005, 04:19:37 PM

Title: sodium iodide titration
Post by: sophie on September 16, 2005, 04:19:37 PM

please *delete me*!  Doing a sodium iodide titration with 0.05M potassium iodide.  How do I standardize the potassium iodide

Title: Re:sodium iodide titration
Post by: Borek on September 17, 2005, 06:28:22 AM

You do titration of iodide with iodide?

Title: Re:sodium iodide titration
Post by: sdekivit on September 17, 2005, 03:38:04 PM

i would suggest a titration with KMnO4 in acidic environment.

Title: Re:sodium iodide titration
Post by: sophie on September 19, 2005, 10:24:41 AM

The method is a USP method and titrates sodium iodide with 0.05M potassium iodate VS using amaranth TS as an idicator.  So I should use KMnO4?  How should I go about setting up the standardization?  

Title: Re:sodium iodide titration
Post by: Borek on September 19, 2005, 10:50:10 AM

Quote from: sophie on September 19, 2005, 10:24:41 AM

The method is a USP method and titrates sodium iodide with 0.05M potassium iodate VS using amaranth TS as an idicator.  So I should use KMnO4?  How should I go about setting up the standardization?  

So you need to standardize iodate solution, not iodide, right? Potassium iodate is a standard substance, to prepare standardized solution you just need to weight KIO₃ used for solution preparation.