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Chemistry Forums for Students => High School Chemistry Forum => Topic started by: mostlynotugly on November 12, 2009, 11:09:42 AM

Title: How do I make standard solution of iodine in aqueous potassium iodide?
Post by: mostlynotugly on November 12, 2009, 11:09:42 AM

How do I make standard solution of iodine in aqueous potassium iodide?

Any takers?  ???

Title: Re: How do I make standard solution of iodine in aqueous potassium iodide?
Post by: Borek on November 12, 2009, 11:47:50 AM

http://www.titrations.info/iodometric-titration-solutions

http://www.titrations.info/iodometric-titration-standardization

Title: Re: How do I make standard solution of iodine in aqueous potassium iodide?
Post by: mostlynotugly on November 12, 2009, 12:24:43 PM

Thanks, I titrated a DCPIP solution against Vitamin C, but there was no pink colour change it just went straight to blue? Is DCPIP unreliable?

Title: Re: How do I make standard solution of iodine in aqueous potassium iodide?
Post by: Borek on November 12, 2009, 01:41:20 PM

What pH? I seem to remember that it requires acidic solution to become pink, but I can be wrong.