Homework Help: Chemistry-iodometric titration

Posted by angela on Wednesday, August 4, 2010 at 7:39pm.

In an iodometric titration, excess potassium iodide solution (KI) is added to the sample.Analyte such as chlorine liberates iodine from KI under acidic condition. Liberated iodine is titrated against standard sodium thiosulphate.
The concentration of analyte in the sample is given as
mg analyte/L
= (mL sodium thiosulphate x normality of sodium thiosulphate x milliequivalent weight of analyte) / mL of sample

Why do we need to multiply by normality of sodium thiosulphate?

Chemistry-iodometric titration - DrBob222, Wednesday, August 4, 2010 at 7:43pm
mL Na2S2O3 x N Na2S2O3 = # milliequivalents.
Then #milliequivalents x milliequivalent weight = grams.

Answer this Question

Related Questions

Analytical Chemistry - Predict the effect (Increase, Decrease, No effect, ...
chemistry - Equations for iodometric titration of carbon monoxide
Science : Chemistry - The concentration of dissolved chlorine in tap water can ...
Chemistry - please help - Please help to determine the (%w/w) benzoyl peroxide (...
chemistry - Predict the effect (Increase, Decrease, No effect, Indeterminate)and...
analytical chemistry - Predict the effect (Increase, Decrease, No effect, ...
chemistry - When varsol and iodine in potassium iodide aqueous solution is mixed...
chemistry - Potassium iodide (KI) is used to treat iodine deficiencies. What is ...
Repost-Chemistry -please help - Hi, sorry I missed out something. The titrant ...
Chemistry - Determine the moles of ammonia in the following cobalt ammine ...

For Further Reading

First Name:
School Subject:
Answer: