14010754
Description
Flashcards by I Shouldn't be awake, updated more than 1 year ago
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Created by I Shouldn't be awake
over 6 years ago
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| Question | Answer |
| Chromium(III) Sulfate with water | [Cr(H2O)5SO4]+ Green |
| Chromium alum with water | [Cr(H2O)6]2+ purple solution |
| Chromium with limited ammonia | Cr(OH)3 Grey-green |
| Chromium with excess ammonia | [Cr(NH3)6]2+ Purple |
| Chromium with limited NaOH | Cr(OH)3 Green |
| Chromium with excess NaOH | [Cr(OH)6]3- Dark green |
| Dichromate reduction | Cr2O72- orange /H+ with Zn forms Cr3+ (green) |
| Further reduction | EXCESS Zn(s) pale blue Cr2+ formed |
| Oxidation of Cr3+ | Hot H2O2/OH- forms CrO42- |
| Cr2+ | pale blue |
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