Criado por I Shouldn't be awake
mais de 6 anos atrás
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Questão | Responda |
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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