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Hi, i'm working on lab report on iodometric determination of Cu in Brass and can someone...

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Chemistry

Hi, i'm working on lab report on iodometric determination of Cuin Brass and can someone please explain in WORDSon how the analyte (copper) reaction with iodide works? thanks

2Cu2+ + excess I- → 2CuI(s) + I2

Answer & Explanation Solved by verified expert
4.2 Ratings (744 Votes)
In acid solution practically all oxidizing agents will oxidize iodide ion to iodine quantitatively The iodine formed in the reaction can then be titrated by means of a standard sodium thiosulfate solution This type of indirect titration is given the general name of iodometry 2Cu2 excess I 2CuIs I2 The amount of iodine liberated in the reaction between iodide ion and an oxidizing agent is a measure of the quantity of oxidizing agent originally present in the solution The amount of standard sodium    See Answer
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