Why we have to add 200mg Na2CO3 in preparation of 0.1N sodium thiosulfate solution?





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Hai friends my name is Radha. I am selected in the sbi clerk exam held on november 2009. I am a chemistry graduate. What type of questions they will ask in the internviews. Any body having the answer please send to my mail id radhaswedha@rediffmail.com

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Why we have to add 200mg Na2CO3 in preparation of 0.1N sodium thiosulfate solution?

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