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Iodine reduction by tin
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Title: Iodine reduction by tin
Caption: Iodine reduction by tin. Tin(II) sulfate (SnSO4) solution has pale yellow color (left vial). Iodine (I2) dissolved in water with added potassium iodide (KI) and polyvinyl alcohol has deep blue color (right vial). When tin(II) sulfate solution is added drop by drop to the iodine solution (middle vial), it becomes colorless, as I2 is reduced to I- and Sn2+ is oxidized to Sn4+: Sn2+ + I2 -> Sn4+ + I-.
Credit: Album / Science Source / GIPhotoStock Images
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Image size: 10000 × 2792 px | 79.9 MB
Print size: 84.7 × 23.6 cm | 3937.0 × 1099.2 in (300 dpi)
