117. Solving a chemistry problem
Seller: Derkach
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Product description
Is it possible: a) by the action of Bertolet's salt in an acidic medium, oxidize iodide - ions to free iodine; b) chloride - ions to free chlorine c) by the action of potassium dichromate in an acidic medium, oxidize arsenite - ion to arsenate - ion? Why, when oxalic acid (or oxalate) is titrated, do the first drops of a permanganate solution discolour slowly, while in the future this discolouration occurs almost instantly? What can be done so that the first drops of KMnO4 also instantly discolor?
Additional information
If you do not open the file - install the RAR archiver. Inside the archive you will find a solution in Word format.