ʻO ka ua ʻulaʻula paha ka sodium polysulfide precipitation. ʻOi aku ka nui o ka sodium sulfide e oxidized e ka ea i ka sodium polysulfide (e hana i ka sulfur i mea hoʻokahi, a laila hana i ka sodium polysulfide). Ke kiʻekiʻe ka index sulfur o ka sodium polysulfide, ʻulaʻula ʻeleʻele i loko o ka wai wai, a puka mai ia ma muli o ka hopena insoluble ma lalo o nā kūlana anaqueous. a me ka wai (hiki ke kākau ʻia ka pane ʻana o ka 1:6).
Ka ʻike ʻana i ke ʻano kuhikuhi o ka ua ʻulaʻula
Wehe i ka mea ʻulaʻula a holoi i nā manawa he nui me ka ethanol piha (e hoʻāʻo e holoi i ka solution sodium sulfide) e ʻike inā e hemo. , a holoi ia i na manawa he nui me ka ethanol. E lawe i ka ua a me ka dilute sulfuric acid, e nana ina he hydrogen sulfide pakele (pono e hiki ke honi ia oe, hiki no hoi ia oe ke hoohana i ka pulu acetate a i ole ke alakai nitrate pepa hoao) , ka ua inā he nui ka hoʻololi ʻana i ka ʻulaʻula melemele a i ʻole ka waiu keʻokeʻo turbidity, ʻo ia ka huahana o ka sodium polysulfide (potassium) ka hanana. hana ʻana i ka carbonate (carbon tetrachloride alkali decomposition product).
Ka manawa hoʻouna: Iune-13-2022
