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March 29, 2017

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Hello.
I have this question for my class.
We were to mix Na2S2O3 to a a test-tube with Varsol layer on top and an Aqueous layer (of I2/KI) on the bottom. I observed a lighter colour change in both layers. How would I express that as a chemical equation?
Also, I added saturated KI to a test-tube with the same two layers. The pink colour in Varsol got lighter and the colour in Aqueous solution also got lighter. How would I write this as a chemical equation?
Thanks

  • Science - ,

    Sorry, my apologies.
    After adding Na2S2O3, the Varsol layer became colorless and there was no change in the Aqueous layer.

  • Science - ,

    Also forgot to include:
    I2(aq) + I- <-> I3- (aq) = AQUEOUS LAYER
    I2(aq) <-> I2 = VARSOL

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