Re: zinc nickel composition
actually i am working with acid digestion method.im stripped off the zinc nickel plating from metal by using nitric acid and then do 2 titration with EDTA.the first one with murexide indicator then second with xylenol orange indicator.but my problem is the 1st titration which i used murexide indicator is so hard to identify the color change from yellow to reddish violet.now i just put about 3 cristal into it. What is the right amount i should use?
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